English - ROLLVIS SWISS, Vis à rouleaux satellites

Who is ROLLVIS ?
After its founding in 1970, ROLLVIS SA soon began to focus on the manufacture
and marketing of satellite roller screws under the trademark « Rollvis swiss ».
Now a benchmark in this highly specialised field, ROLLVIS SA has invested
in the most powerful machines for the production of screws with low tolerance
margins designed to individual specifications.
A fast-growing company with a young and highly qualified workforce,
ROLLVIS SA recently moved into new ultra-modern premises near to Geneva.
It is structured to preserve its human scale and its capacity to listen and adapt
perfectly to its customers’ requirements.
Three decades and more of skills and experience combined with the latest
high-end techniques ensure its products comply with the most stringent and
demanding standards, notably in the following applications:
aeronautics, space
defence, car industry
moulding, injection
(plastics and metal)
optical, graphics
special machine tools
medical
electrical cylinders
measuring machines
and laser machines
robotics, chemicals,
and all other fields
of high technology
To ensure its satellite roller screws always gain by the latest progress in technology
to make them ever more reliable, ROLLVIS SA has set up its own « Research
and Development » department where its highly qualified engineers and
technicians use the most recent and most powerful design software available
in their unceasing quest for the control of avant-garde technologies.
New processes are constantly reviewed to optimise the product, production
system, quality control, tests and trials for individual requirements.
Even the most exacting customers swear by the outstanding reliability and
quality of ROLLVIS products.
Present on all the continents, over time ROLLVIS SA has built up an excellent
sales network, so that wherever you are in the world, there are experts to give
you answers and advice.

contents
Introduction - Satellite roller screws compared to ball screws 2
- 1 -
Types of roller screws 3 and 4
Identification system 5
Accuracy - Efficiency 6
Geometry 7
Preloading 8
Preloading examples 9
Mean speed and axial load 10
Nominal lifespan 11
Rigidity 12
Rotation speed 13
Driving torque 14 and 15
Calculation example 16 and 17
Lubrication 18 and 19
Handling advice 20 and 21
Preference program
Type RV ........ diameters of 3.5 to 12 22
Type RV ......... diameters of 15 to 23 23
Type RV ......... diameters of 25 to 36 24
Type RV ......... diameters of 39 to 48 25
Type RV ......... diameters of 51 to 75 26
Type RV ...... diameters of 80 to 150 27
Type BRV ......... diameters of 8 to 44 28
Type RVR ...... diameters of 8 to 125 29
No liability can be accepted for any errors or omissions.
We reserve the right to make changes in the interest of technical progress.
Applications 30 to 32

Introduction
ROLLVIS satellite roller screws are used to transform rotary movements
into linear movements and vice versa. The bearing elements are threaded
rollers between the screw and the nut. The high number of points of contact
enables satellite roller screws to support very heavy loads.
The ROLLVIS manufacturing programme comprises satellite roller screws
without roller recycling (types RV and BRV) and with roller recycling (type RVR),
in a range of accuracy classes.
The ROLLVIS range also includes other types such as the reverse roller screw
(type RVI) and the differential screw (type RVD).
Satellite roller screws compared to ball screws
The satellite roller screw is similar to the ball screw with the difference
that the load transfer elements are threaded rollers.
The main advantage of satellite roller screws is that they have a high
number of points of contact to support the load.
Load capacity and lifespan
The main advantage of roller screws compared to ball screws is that their
admissible static and dynamic load capacities are higher.
The bearing function is ensured by threaded rollers instead of balls and
the load is spread over a higher number of points of contact.
- 2 -
Satellite roller screws like ball screws
use Hertz’s law.
The admissible Hertz pressure is the same for satellite roller screws and
ball screws. Satellite roller screws thus have a static load 3 times greater
than that of ball screws and their lifespan is 15 times longer.
Speed & acceleration
Satellite roller screws can rotate much faster and support much greater
acceleration.
RV and BRV satellite roller screws are designed so that the rollers are not
recycled. This means the mechanism can support twice the rotation speed
of a ball screw. Acceleration can reach up to 3g.
Lead & pitch
Planetary roller screw can be achieved with smaller leads compared
to ball screws.
As the lead is a function of the pitch of the planetary roller screw, the lead
can be very small (0.5mm and even less).
Planetary roller screws can be achieved with entire or real numbers
(i.e. lead of 3.32mm per revolution), which avoid reduction gears.
This is an advantage compared to ball screws. The lead can be chosen and
realised without any geometrical changes of both the screw shaft and the
nut body, which allows updates with minor changes.
In a ball screw the lead is limited by the dimension (OD) of the bearing
ball, which is a standard feature.
Rigidity & strength
The many points of contact give a satellite roller screw greater rigidity and
shock tolerance than a ball screw.

RV and BRV screws
The main elements of RV and BRV satellite roller screws are the
screw, the nut and satellite rollers.
The screw has a multiple-start thread. The angle between the flanks is
90° and the profile is triangular. The nut has an internal thread identical
to that of the screw. The rollers have a single-start thread with an angle
the same as that of the nut. This ensures there is no axial movement
between the nut and the rollers. The rollers do not therefore need
to be recycled.
RV
and
BRV
RVR screws
RVR satellite roller screws have very fine threads and are used when
very great positioning accuracy is required along with high rigidity and
load-carrying capacity.
The main elements of RVR satellite roller screws are the screw, the nut
and the rollers which are guided and maintained at the correct distance
in a cage.
The screw has a single- or two-start thread with a triangular profile. The
angle between the flanks is 90°. The nut has the same internal thread as
the screw. The rollers are not threaded but have grooves perpendicular
RVR
Types of roller screws
- 3 -
The flanks of the roller thread are convex. At each end of the rollers there
is a cylindrical pivot and gear teeth. The pivots are mounted in the holes
of the end rings, thus ensuring the rollers are equidistant. The end rings
are floated in the nut body and axially secured with circlips.
The gear teeth engage in gear wheels fixed in the nut. This guides the
rollers parallel to the axis to ensure perfect functioning.
to the screw axis. The distance between the grooves matches the exposed
thread of the screw and nut. The flanks are convex and the angle
between them is 90°.
When the screw or nut rotates, the rollers are axially displaced in the nut.
After a complete revolution, each roller is returned to its initial position by
two cams at the end of each nut. They can be recycled this way because
there is a groove the length of the nut.
The cage pockets are slightly longer than the rollers to enable them
to move axially within the nut.

RVI
RVI screws
Types of roller screws (ctd.)
RVI satellite roller screws work on the same principle as RV and BRV screws except that their
nut system is reversed.
This means the rollers themselves rotate around the screw (instead of the nut in RV and BRV
screws) and move axially within the nut.
Apart from the screw threading where the rollers orbit, the journal is smooth and can have a special
shape (e.g.: antirotation).
The nut is threaded along its entire length and is much longer than on RV and BRV screws.
It governs the overall travel of the complete screw and therefore limits it if needed.
RVD screws
The RVD differential screw is actually a variant of the RV and BRV screws.
Its components, expertly calculated and adjusted, are used to produce extremely fine threads
(less than 0.02 mm).
The movement of the rollers in this somewhat complex mechanism does however prevent
a wide range of travel.
The nuts are larger than on the RV and BRV types.
- 4 -

Design RV = ground thread, non-recycling rollers
BRV = rolled thread, non-recycling rollers
RVR = ground thread, recycling rollers
RVI = ground thread – reverse system
RVD = ground thread – differential screw
Nut types 1 = single nut
2 = split nut
3 = double nut
Nut design 1 = cylindrical nut
6 = nut with flange at one end
7 = nut with central flange
8 = special nut design
Seal 0 = without wipers
1 = with wipers
Screw diameter d0 in mm
Nominal lead P in mm
Thread direction R = right
B = right/left
L = left
Thread accuracy G1 = 6 µm/300 mm
G3 = 12 µm/300 mm
G5 = 23 µm/300 mm
G9 = 200 µm/1000 mm (BRV only)
6-digit number to identify customer’s specification
Identification system
- 5 -
Example
RV 210 / 30. 5. R3. 6-- ---

Satellite roller screws are divided into tolerance classes based on DIN
69051, part 3 (ball screws). The determining factor is the lead error V300p
referred to a thread length of 300 mm.
The table opposite
shows the tolerance
classes:
Tolerance Cl
V300p
G1
6 µm/300 mm
G3
12 µm/300 mm
G5
23 µm/300 mm
G9
200 µm/1000 mm
Positioning satellite roller screws are supplied in tolerance classes G1, G3
and G5 and transport satellite roller screws (type BRV) in tolerance
class G9.
Lead error
The lead error ep relative to effective travel Lu is calculated for the transport
satellite roller screw by the following formula:
ep = 2 . Lu . V300p
1000
Lead errors ep for positioning satellite roller screws are shown in the table
opposite. For tolerance classes G1 and G3, the lead and torque diagrams
are supplied with the screws.
Lead is checked by a 3D measuring machine or on a measuring bench
equipped with a laser interferometer.
Efficiency in %
100
90
80
70
60
50
40
30
20
10
η 1
η 2
Machine tools
Measuring machines
Specific machines (benders)
Robotics
Aeronautics (aeroplanes and helicopters)
Space (rockets and satellites)
Satellite roller
screw
Trapezoidal
thread screw
1 2 3 4 5 6 7 8 9 10
Helix angle ϕ in deg.
Accuracy
Efficiency
Rollvis satellite roller screws achieve high rates of mechanical efficiency.
The figure opposite shows efficiency rates η1 for the ascent and η2 for the descent,
according to the helix angle. The efficiency of a trapezoidal thread screw is shown
for comparison. Satellite roller screws, unlike friction screws, are not self-locking.
Advantages
High axial load capacity
Long lifespan
High efficiency
No backlash
Extremely high rigidity
Defence (tanks, cannons, missiles, etc.)
Oil industry
Nuclear industry
Medical
Chemical industry
Optical
- 6 -
Lead accuracy symbols according to DIN 69051/3
P nominal lead
e0 difference between required lead and nominal lead
V300p difference between actual and nominal lead
over 300 mm
ep difference between actual and nominal lead
over a length Lu
Vup travel variation over a length Lu
V2πp travel variation over one revolution
effective travel
Lu
more than
315 mm
400 mm
500 mm
630 mm
800 mm
1000 mm
1250 mm
1600 mm
2000 mm
2500 mm
Applications
Rollvis satellite roller screws have proved their superior worth in many fields of applications such as:
Lu
315 mm
400 mm
500 mm
630 mm
800 mm
1000 mm
1250 mm
1600 mm
2000 mm
2500 mm
3150 mm
Ep in microns
for tolerance class up to
G1 G3 G5
6
12
23
7
13
25
8
15
27
9
16
30
10
18
35
11
21
40
13
24
46
15
29
54
65
77
93
Accuracy greater than 6 µm/300 mm
High rotation speed (RV and BRV systems)
Small leads (from 0.25 mm)
with wide diameters (system RVR)
Fast acceleration and deceleration
Telescopes
Graphics
Laser machines
Injection moulding machines
Car industry

Nut geometry and shape
Standard satellite roller screws are available with 3 nut designs:
• single nut (ES)
• split nut (EF)
• double nut (ED)
Geometry
Single nuts have low axial backlash of 0.01 to 0.03 mm. The split cylindrical nut is preloaded by clamping
the two halves of the nut in a housing. A precision spacer ring is mounted between the two halves to maintain
the required level of preloading. Split nuts with a flange at one end have a spacer ring designed to hold the
halves apart. The halves are aligned by a parallel key. Double nuts are preloaded in the same way as split nuts.
FLANGE SHAPES
Shape A Shape B
60° 60°
- 7 -
45° 30°
SINGLE NUTS
• Nuts in one piece
with axial backlash
• Wipers
(if requested by the customer)
SPLIT NUTS:
• Nuts in two pieces, preloaded,
without backlash
• Same dimensions as single nuts
• Reduced load capacities
• Wipers
(if requested by the customer)
DOUBLE NUTS:
• Two single nuts, preloaded,
without backlash
• Same load capacities as single nuts
• About twice as long as single nuts
• Wipers
(if requested by the customer)

Preloaded nuts are used to eliminate backlash and increase rigidity.
Preloading should be carefully calculated to achieve the highest rate of efficiency and the
longest possible lifespan (see figure above).
For preloaded nuts, in addition to the individual loads F1…Fn, preload Fv must also
be taken into account to determine the mean load Fm. This yields new individual
loads F1v…Fnv.
If for example an absence of backlash is required for all operational loads, preload Fv must
be selected according to the maximum load Fmax.
Fv = Fmax [N]
2.83
If a satellite roller screw only needs to be backlash-free for a specific load, preload Fv
should be selected according to the corresponding load Fn.
Fv = Fn [N]
2.83
Unless the customer otherwise requests, split and double nuts are preloaded in the standard
version to a maximum of 5% of the dynamic load capacity.
F1…Fn [N] : individual loads
Fv [N] : preloading force
Preloading
Fnv [N] : load resulting from the individual load and preloading
Fma [N] : mean load taking into account preloading
F1
FV
- 8 -
F2
Resulting load depending on preload Fv
An axial load on a preloaded nut system increases
the load of one of the halves and relieves the other from
the preloading force. The resulting load can be estimated
by the following equations:
Loaded half of nut:
Fnv(1) = Fv + 0.65 . Fn [N] if Fn < 2.83 . Fv [N]
Fnv(1) = Fn [N] if Fn ≥ 2.83 . Fv [N]
Relieved half of nut:
Fnv(2) = Fv - 0.35 . Fn [N] if Fn < 2.83 . Fv [N]
Fnv(2) = 0 [N] if Fn ≥ 2.83 . Fv [N]

Preloading examples
Preloading with rigid spacer (thickness calibrated by Rollvis SA)
Preloading with elastic washers
Flange nut Cylindrical nut
Elastic washers
Flange nut Cylindrical nut
- 9 -

For variable speed and load, lifespan should be calculated with mean
values nm and Fm.
For variable speed and constant load with speed n, the mean speed
nm is used (figure below).
nm = q1 .n1 + q2 .n2 + …[min -1 ]
100 100
Mean speed and axial load
- 10 -
For a variable load at constant speed, the mean load Fm is used
(figure below).
3
Fm =
3
F1
3
. q1
+ F2 . q2
+ …[N]
100 100
For a variable load at variable speed, the mean load Fm is used.
3
Fm =
3
F1
3
. q1 n1
. + F2 . q2 n2
. + …[N]
100 nm 100 nm
For a variable linear load at constant speed, the mean load Fm is used
(figure below).
Fm = Fmin+ 2 . Fmax [N]
3
nm [min -1 ] : mean speed
n1…nn [min -1 ] : individual speeds
q1…qn [%] : time percentage
Fm [N] : mean load
F ; F1…Fn ; Fmin; Fmax [N] : actual forces

Nominal lifespan
The nominal lifespan L10 or Lh of a satellite roller screw is attained with a probability of 90%.
If greater reliability is required, the nominal lifespan L10 or Lh must be multiplied by the reliability factor fr
(table opposite).
Modified lifespan Ln = L10 . fr [revolutions]
or Lhn = Lh . fr [h]
Nominal lifespan of single nuts (with backlash)
The nominal lifespan of single nuts is calculated by the following formula:
or
- 11 -
L10 = ( C ) 3
Lh =
fm
Reliability
%
90
95
96
97
98
99
L10 [h]
nm . 60
If the lifespan is predetermined, the dynamic load capacity is calculated as follows: C = Fm . L10 [N]
106 3
The lifespan in actual hours LhN is calculated by the following formula:
The utilisation factor fN is calculated as follows:
Nominal lifespan of preloaded nuts
For preloaded nuts, it is first necessary to calculate the lifespan of each half of the nut
with the corresponding dynamic load capacity C and the mean axial load Fma
(including preload). The total lifespan L10 of the preloaded nut is obtained with
the two lifespan values L10(1) and L10(2) (in revolutions).
Ln [revolutions] : modified lifespan (revolutions)
Lhn [h] : modified lifespan (hours)
L10 [revolutions] : nominal lifespan (revolutions)
Lh [h] : nominal lifespan (hours)
LhN [h] : lifetime in actual hours
fr [-] : reliability factor
LhN =
FN =
Lh [h]
fN
fr
1
0.62
0.53
0.44
0.33
0.21
.10 6 [revolutions]
Lifespan of satellite roller screws
Expected lifespan of the machine
L10(1) = ( C ) 3
Fma(1)
L10(2) = ( C ) 3
Fma(2)
C [N] : dynamic load capacity
Fm [N] : mean load (single nut with backlash)
Fma [N] : mean load (preloaded nut)
nm [min -1 ] : mean speed
fN [-] : utilisation factor
.10 6 [revolutions]
.10 6 [revolutions]
L10 = ( L10(1) -10/9 + L10(2) -10/9)
-9/10
[revolutions]

Satellite roller screw rigidity
Rigidity
Case 1 : fkn = 0.25 Case 3 : fkn = 2.0
Case 2 : fkn = 1.0 Case 4 : fkn = 4.0
The overall rigidity Cges of a satellite roller screw is made up of the
following individual rigidity values:
Cme nut rigidity
CL bearing rigidity
CSp screw rigidity
Cu rigidity of the surrounding
construction
Nut rigidity Cme
The rigidity Cme of a complete satellite roller screw nut can be approximated
with the following formula:
Cme = fm . fK . Fn 1/3 [N/µm]
fm for single nut ES = 0.75
fm for split nut EF = 1
fm for double nut ED = 1.5
The following condition is set for Fn for the Cme values shown in the
table for standard preloading:
Fn = 2.83 . FV [N]
Fv [N] : preloading force
Fn [N] : axial load
Cme [N/µm] : nut rigidity
Cs [N/µm] : screw rigidity
[N2/3 /µm] : rigidity factor
fk
- 12 -
Nut rigidity CS
Nut rigidity CS can be determined by the following simplified formula:
CS = 164 .
d0 2
L
[N/µm]
Permissible buckling force Fknzul
at rotation speed n = 0
Permissible buckling force can be calculated by the following formula:
Fknzul = 0.8 . 101.6 . fkn .
4
d0
L2 [kN]
fm [-] : correction factor
L [mm] : free screw length
d0 [mm] : nominal diameter of screw
Fknzul [N] : permissible buckling force
fkn [-] : correction factor for bearing type

Permissible rotation speed
and axial load
Satellite roller screws are restricted by the internal
configuration of the nut, the bearings at the
end of the screw and the critical number of revolutions
nkr due to flexural vibration.
The value of the permissible speed applied
can be:
RV : d0 . n ≤ 140'000
RVR : d0 . n ≤ 32'000
Rotation speed
Case 1 : fkr = 0,32 Case 3 : fkr = 1,55
Case 2 : fkr = 1,0 Case 4 : fkr = 2,24
n [min-1 ] : rotation speed
nkr [min-1 ] : critical rotation speed
nkrzul [min-1 ] : permissible critical rotation speed
L [mm] : free screw length
L
L
Critical speed nkr with axial load Fn = 0
Critical speed is influenced by the axial load. It can be calculated on request for every satellite
roller screw configuration.
When the correct screw end bearings are chosen, their maximum speed will have no effect on the
desired speed. All that needs to be determined is the critical speed nkr for flexural vibration.
The critical speed nkr for flexural vibration can be calculated by the formula below. The correction
factor fkr depends on the type of bearing and the clamping conditions (figure above).
The calculation is based on the assumption that satellite roller screw nuts provide no guidance
and the bearings at the screw end are considered rigid in the radial direction.
nkr = 108 . 10 6 . d0 . 1
L 2
The permissible critical speed can be calculated by taking the bearing type into account:
nkrzul = 0.8 . nkr . fkr [min-1 ]
d0 [mm] : nominal diameter of screw
fkr [-] : correction factor for bearing type
0,8 [-] : safety factor
- 13 -
[min -1 ]
L
L

Driving torque
All the values for motor rating can be calculated by the formulas below.
Note that the load-free torque Mv must be taken into account for preloaded nuts (based on preloading Fv).
For single nuts with backlash, the formula is: Mv = 0 [Nm]
Motor driving torque MM at constant speed
Load-free torque
« Ascent » load torque ML1 =
- 14 -
Mv = Fv . P . i . c
2000 . π
P . i . F
2000 . π . η1
« Descent » load torque ML2 = P . i . F . η 2
The frictional forces of the guide slideway
must be taken into account in feed force F.
Screw lead P
2000 . π
Motor driving torque MM = (MV + ML1,2 + MR . i) [Nm]
If, as is possible in « Descent » mode, the motor driving torque is negative,
the motor must have a brake.
Motor driving power PM = MM . nM
9.55
d [mm] : external diameter of screw
d2 [mm] : core diameter of screw
P [mm] : screw lead
L [mm] : length of satellite roller screw
mT [kg] : mass to move
D1 [mm] : diameter of driving wheel
D2 [mm] : diameter of driven wheel
i [-] : reduction ratio
F [N] : feed force
Fv [N] : preloading force
J2
Driving torque
JM
nM
J1
i = D1
D2
MM
[Nm]
[Nm]
[Nm]
[W]
Fa [N] : acceleration force
Mv [Nm] : load-free torque
ML1 [Nm] : « ascent » load torque at constant speed
ML2 [Nm] : « descent » load torque at constant speed
MM [Nm] : motor driving torque
MLa [Nm] : load torque on acceleration
MB [Nm] : acceleration torque
MMa [Nm] : motor driving torque on acceleration
MR [Nm] : frictional torque of screw bearings
[kgm2 ] : moment of inertia of motor
JM
v
F

Motor driving torque MMa with acceleration
The rotary moment of inertia of screw JR is a rough estimate.
We shall be happy to calculate the exact value on request.
Load torque MLa =
Motor speed nM =
Rotation speed reached after acceleration nM =
JR [kgm2 ] : rotary moment of inertia of screw
JT [kgm2 ] : translatory moment of inertia of screw
J [kgm2 ] : moment of inertia
J1 [kgm2 ] : moment of inertia of driving wheel
J2 [kgm2 ] : moment of inertia of driven wheel
PM [W] : driving power of motor at constant speed
PMa [W] : driving power of motor on acceleration
sB [mm] : acceleration path
tB [s] : acceleration time
v [m/s] : speed rate
- 15 -
P . i . (F + F2)
2000 . π . η1
Translatory moment of inertia JT = mT .( P 2 . π)
Rotary moment of inertia (screw) JR = 4.8 . (d1 + d2) 4 . L . 10 -14 [kgm 2 ] (for steel)
Sum of reduced moments of inertia J = JM + J1 + i 2 (JR + JT + J2) [kgm 2 ]
v . 6 . 104
P . i
Acceleration torque MB = f (nM) MB = nM . J
9.55 . tB . η
Acceleration torque MB = f (sB) MB = 4 . π . sB . J
P . i . tB 2 . η
Acceleration time tB = f (nM) tB =
Acceleration time tB = f (sB) tB =
nM . J
9.55 . MB . η
4 . π . sB . J
P . i . MB . η
120 . sB
P . i . tB
Path travelled during acceleration sB = nM . tB . P . i
120
Motor driving torque MMa = (Mv + MLa + MR . i + MB) [Nm]
Motor driving power PMa = Mma . nM
9.55
2
[Nm]
. 10 6 [kgm 2 ]
[Min -1 ]
[Nm]
[Nm]
[Min -1 ]
[mm]
[W]
nM [min-1 ] : rotation speed of motor
η [-] : mechanical efficiency of gearing
η1 [-] : mechanical efficiency of satellite roller screw
for « ascent » η1 = 0,71…0,89
η2 [-] : mechanical efficiency of satellite roller screw
for « descent » η2 = 0,61…0,85
c [-] : coefficient of friction referred to preloading
c = 0,1…0,5
(for efficiencies η1 + η1 see page 6)
[s]
[s]

Satellite roller screws RV 20 x 5
Nominal diameter : d0 = 20 mm
Lead : P = 5 mm
Nut : split nut (EF), preloaded
Mounting position : horizontal
Load direction : both sides
Rapid mode : one side, opposite to working load
Calculation example
- 16 -
N°
1
2
3
4
Operating mode
Peak load
Roughing feed
Finishing feed
Rapid
Time percentage
q [%]
q1 = 5
q2 = 40
q3 = 50
q4 = 5
Rotation speed
n [min -1]
n1 = 15
n2 = 110
n3 = 70
n4 = 1700
Axial load
F n [N]
F1 = 8300
F2 = 4500
F3 = 4200
F4 = 1150
Mean speed nm = 5 . 15 + 40 . 110 + 50 . 70 + 5 . 1700 = 165 min -1
100 100 100 100
Preloading
Preloading is defined for the « finishing feed »
operating mode (F3 = 4200 N).
Load on nut half 1
Nut half 1 is loaded in operating modes 1, 2 and 3.
As F1, F2 eand F3 ≥ 2,83 Fv:
Nut half 1 is only partly loaded in operating mode 4.
As F4 = 1150 N < 2,83 FV:
Load on nut half 2
Half nut 2 is loaded in operating mode 4.
Half nut 2 is not loaded in operating modes 1, 2 and 3.
As F4 < 2,83 . Fv:
Mean load
Nut 1
Nut 2
Lifespan
Dynamic load capacity of a nut C = 23 400 N
Half nut 1
Half nut 2
3
Fv = 4200 = 1484 N
2.83
Fnv = Fn hence F1V = 8300 N
F2V = 4500 N
F3V = 4200 N
F4v = 1484 - 0,35 . 1150 = 1082 N
F1v = F2v = F3v = 0
F4v = 1484 + 0.65 . 1150 = 2232 N
Fma(1) = 8300 3 . 15 . 5 + 4500 3 . 110 . 40 + 4200 3 . 70 . 50 + 1082 3 . 1700 . 5 = 3511 N
165 100 165 100 165 100 165 100
3
Fma(2) = 2232 3 . 1700 . 5 = 1789 N
165 100
L10(1) = ( 23400 ) 3
3511
L10(2) = ( 23400 ) 3
1789
.10 6 = 296 . 10 6 revolutions
.10 6 = 2237 . 10 6 revolutions

Total lifespan
Lifespan in hours (with utilisation factor fN = 0,6)
Nut rigidity Cme = 1 . 42.5 . 4200 1/3 = 686 N/µm
Satellite roller screw rigidity
Free length between fixed bearing and nut 1 = 1000 mm
Nominal diameter of screw d1 = 20 mm
Bearing rigidity C1 = 850 N/µm (assumed value)
Driving torque
Driving torque MM is calculated for the peak load of F1 = 8300 N.
The screw is directly driven by the motor (i = 1).
Load-free torque:
Load torque:
Frictional torque of bearings:
Peak driving torque of motor at constant speed:
Motor driving power reaches its peak in rapid mode with F4 = 1150 N.
Load torque:
Peak driving power of motor at constant speed:
- 17 -
L10 = [(296 . 10 6 ) -10/9 + (2237 . 10 6 ) -10/9 )] -9/10
L10 = 270 . 10 6 revolutions
LhN =
270 . 106
= 45 450 h
165 . 0.6 . 60
CS = 164 . 202
1000
Total rigidity of satellite roller screw system 1
=
1
+
1
+
1
Cges 686 66 850
Mv = 1484 . 5 . 1 . 0.43 = 0.5 Nm
2000 . π
ML1 = 5 . 1 . 8300 = 7.6 Nm
2000 . π . 0.87
MR = 0.2 Nm (assumed)
= 66 N/µm
MMmax = 0.5 + 7.6 + 0.2 = 8.3 Nm
ML4 = 5 . 1 . 1150 = 1,05 Nm
2000 . π . 0.87
Cges = 56 N/µm
PMmax = (1.05 + 0,5 + 0.2) . 1700 = 312 W
9.55

Oil lubrication
Circulating mineral oils with EP additives to enhance resistance to aging
and corrosion in compliance with CL based on DIN 51517, part 2, are
especially suitable for the lubrication of satellite roller screws. Speed,
ambient temperature and operating temperature are determining factors
in the choice of viscosity.
The amount of oil required depends on the screw diameter, the number
of supporting rollers and the amount of heat to dissipate. 1 cm 3 /h
(for small screw diameters) to 30 cm 3 /h (for large screw diameters) can
be used as reference values.
The shortest possible lubrication intervals (…5 minutes) are recommended
for high loads and longer intervals (5 minutes to 1 hr) for low loads.
Automatic lubrication is recommended for high loads and speeds.
For immersion lubrication, the oil level should be such that the bottommost
roller is completely submerged in the oil. The amount of oil and the
oil-change intervals depend on the loading and installation.
The viscosity of the oil should be chosen to enable an adequate film of
lubricant to form on the contact surfaces.
Figure a shows the operating viscosity νκ to achieve for the mean speed
of the satellite roller screw and screw diameter.
Viscosity νκ ensures a state of lubrication to fulfil the nominal lifespan
provided the lubrication system is free of foreign bodies.
Nominal viscosity can be calculated on the basis of viscosity νκ with the
viscosity-temperature diagram (diagram ν-t, figure b) and the operating
temperature. Nominal viscosity is the viscosity of oil at 40°C. Viscosity
classes ISO VG (DIN 51519) are plotted in diagram ν-t.
Lubrication
As a general rule, the same lubricants are used for satellite roller screws as for roller bearings, i.e. either oil or grease. The type of lubricant used mostly
depends on operating and maintenance conditions. Unless the customer explicitly instructs otherwise, standard Rollvis grease is applied at the factory.
Grease lubrication
- 18 -
Figure a shows the nominal diameters of RV satellite roller screws. The
diameters of RVR satellite roller screws are slightly different. The requisite
operating viscosity values can be obtained by interpolation.
Intermediate values can be obtained from the steps. These must be rounded
up to the nearest viscosity value.
The operating temperature must be known or estimated to calculate
nominal viscosity. The operating temperature must be measured on the
nut after stabilisation. A suitable oil can be found in oil suppliers’ lists with
the nominal viscosity at 40°C. In general, an operating temperature of
30°C can be taken as a basis for selecting a lubricant.
Example: Satellite roller screw RV 39 x 10
Mean operating speed: nm = 1400 min -1
Operating temperature (estimated): t = 25 °C
In figure a, for a number of revolutions nm = 1400 min -1 and a
nominal diameter of 39mm, the nominal viscosity is νκ= 33 mm 2 /s.
In diagram ν-t (figure b), the 25°C temperature and 34 mm 2 /s viscosity
lines intersect between ISO VG 15 and ISO VG 22. The oil to choose will
be in viscosity class VG 22.
A suitable CLP (DIN 51517) or HLP (DIN 51525) oil can be selected
from this class.
The best grease lubricants to use are KP (DIN 51825, part 3) with a consistency factor of 2.
Lubrication intervals depend on the screw arrangement, size and operating conditions. Rollvis can provide recommendations for any type of application.

mm2 [ s ]
ν κ operating viscosity
Operating temperature t [°C]
200
150
100
90
80
70
60
50
40
30
20
15
8000
10000
6000
1000
1400
2000
3000
4000
5000
900
800 700
400
500
600
Mean screw rotation speed nm [min -1 ]
10
10 12 15 20 23 27 30 36 39 48 60 80 100 120
120
110
100
90
80
70
60
50
40
30
20
10
15
22
32
46
Nominal diameter d0 [mm]
460
320
1500
1000
680
10
4 6 8 10 20 30 40 60 100 200 300
mm2 νκ operating viscosity [ s ]
100
68
150
220
- 19 -
300
150
200
Figure b
Figure a

Assembly
If possible, the nut and screw should not be dismantled. However,
should this be necessary, an assembly sleeve must be used.
External diameter d3 of assembly sleeve:
0
- 0,05
d3 = d2
(d2 = screw core diameter)
Handling
CAUTION
RV screws always have a multiple-start thread. If the friction torque is different
after the nut is reassembled, the nut must be taken off again and
refitted on the next thread start until friction torque is correct!
- 20 -
Screw assembly
The following points must be followed when assembling the screw:
1 • Align the screw and slide guideways axially parallel.
2 • Fix the nut in housing.
3 • Run the nut along the entire length of the thread and check the screw
for ease of movement.
Please read the following handling instructions carefully.
To ensure optimal operation and a long lifespan for satellite roller screws, the following points must be scrupulously complied with.
If in doubt, please contact Rollvis.
Lubrication
Transport
Installation
Storage
Bending
Satellite roller screws are greased prior to shipment (unless oil lubrication is requested).
Do not remove this grease. Only use this type of grease for relubrication.
Handle screws with care: do not drop them or damage the thread.
Do not unscrew the nut (or only with an assembly sleeve).
Carefully align satellite roller screws parallel to the guideways.
Alignment errors will damage satellite roller screws.
Only remove satellite roller screws from their original packing just before installation.
Avoid applying radial forces to the nut.
Handling advice

Preference
program
- 21 -
Type RV ........ diameters of 3.5 to 12 22
Type RV ......... diameters of 15 to 23 23
Type RV ......... diameters of 25 to 36 24
Type RV ......... diameters of 39 to 48 25
Type RV ......... diameters of 51 to 75 26
Type RV ...... diameters of 80 to 150 27
Type BRV ......... diameters of 8 to 44 28
Type RVR ...... diameters of 8 to 125 29

Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
3.5 x 1
5 x 1
5 x 2
5 x 3
7 x 1
7 x 2
7 x 3
7 x 4
7 x 5
8 x 1
8 x 2
8 x 3
8 x 4
8 x 5
8 x 6
10 x 1
10 x 2
10 x 3
10 x 4
10 x 5
12 x 1
12 x 2
12 x 3
12 x 4
12 x 5
12 x 8
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
4
5
5
5
5
5
[mm]
3.5
4.5
4.5
4.5
7
7
7
7
7
8
8
8
8
8
8
10.5
10.5
10.5
10.5
10.5
12
12
12
12
12
12
[mm]
3.62
4.62
4.71
4.78
7.09
7.16
7.23
7.28
7.33
8.09
8.17
8.24
8.30
8.35
8.38
10.59
10.64
10.70
10.75
10.79
12.09
12.14
12.22
12.25
12.32
12.42
[mm]
Efficiency
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
Maximum backlash of single nuts: 0.03mm (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
3.35
4.35
4.17
3.97
6.89
6.76
6.62
6.47
6.32
7.89
7.76
7.63
7.49
7.33
7.34
10.38
10.31
10.21
10.10
9.98
11.89
11.81
11.74
11.65
11.56
11.13
0.86
0.85
0.88
0.88
0.84
0.88
0.89
0.89
0.90
0.83
0.87
0.89
0.89
0.89
0.90
0.80
0.86
0.88
0.89
0.89
0.79
0.85
0.87
0.89
0.89
0.90
Type RV - Ground screws
8.3
10.3
7.2
5.3
11.7
9.3
7.6
6.6
5.4
11.5
9.2
7.5
6.7
5.8
5.0
18.7
13.1
11.3
10.5
9.6
19.0
12.8
11.2
10.0
10.5
8.3
6.5
7.8
7.8
7.5
10.9
11.4
11.1
11.0
10.0
10.7
11.4
11.0
11.1
10.7
10.2
17.6
18.1
17.9
18.2
17.9
17.2
18.0
18.1
17.8
18.1
15.7
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
[N 2/3 /µm]
F K
32.6
33.0
23.0
18.8
46.3
32.3
26.2
22.9
19.6
43.8
30.4
24.1
21.4
18.9
17.1
55.3
46.4
36.9
32.6
29.1
51.6
43.5
34.9
29.9
27.3
20.4
5.2
6.5
4.5
3.4
7.4
5.9
4.8
4.2
3.4
7.2
5.8
4.7
4.2
3.7
3.2
11.8
8.3
7.1
6.6
6.0
12.0
8.1
7.1
6.3
6.6
5.2
- 22 -
3.2
3.9
3.9
3.7
5.5
5.7
5.6
5.5
5.0
5.4
5.7
5.5
5.6
5.3
5.1
8.8
9.1
9.0
9.1
9.0
8.6
9.0
9.1
8.9
9.1
7.8
[N 2/3 /µm]
20.5
20.8
14.5
11.8
29.2
20.3
16.5
14.4
12.4
27.6
19.1
15.2
13.5
11.9
10.8
34.8
29.2
23.3
20.5
18.3
32.5
27.4
22.0
18.8
17.2
12.8
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
410
520
300
210
480
300
210
170
140
570
360
260
210
170
140
600
410
300
240
200
760
520
390
310
260
170
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
5.0
5.0
5.0
5.0
5.0
5.0
6.0
6.0
6.0
6.0
6.0
8.0
8.0
8.0
8.0
8.0
8.0
[mm]
D1
15
19
19
19
19
19
19
19
19
21
21
21
21
21
21
26
24
24
24
24
30
26
26
26
26
26
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
35
39
39
39
41
41
41
41
41
41
41
41
41
41
41
48
46
46
46
46
50
46
46
46
46
46
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
41
Fk -------- Rigidity factor
Fv -------- Preloading force
16.0
20.3
20.3
20.3
20.3
20.3
20.3
20.3
20.3
22.3
22.3
22.3
22.3
22.3
22.3
27.3
25.3
25.3
25.3
25.3
31.3
27.3
27.3
27.3
27.3
27.3
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Mv ------ Load-free torque due to preloading

Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
15 x 2
15 x 3
15 x 4
15 x 5
15 x 6
15 x 8
20 x 2
20 x 3
20 x 4
20 x 5
20 x 6
20 x 8
20 x 10
21 x 2
21 x 3
21 x 4
21 x 5
21 x 6
21 x 8
21 x 10
23 x 2
23 x 3
23 x 4
23 x 5
23 x 6
23 x 8
23 x 10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
[mm]
15
15
15
15
15
15
19.5
19.5
19.5
19.5
19.5
19.5
19.5
21
21
21
21
21
21
21
22.5
22.5
22.5
22.5
22.5
22.5
22.5
[mm]
15.14
15.22
15.25
15.32
15.37
15.46
19.65
19.71
19.80
19.83
19.94
19.98
20.04
21.14
21.21
21.28
21.33
21.39
21.49
21.58
22.65
22.72
22.79
22.87
22.89
23.00
23.12
[mm]
14.81
14.74
14.65
14.56
14.47
14.16
19.32
19.22
19.15
19.02
18.97
18.69
18.62
20.82
20.72
20.62
20.52
20.42
20.19
19.96
22.32
22.24
22.15
22.06
21.97
21.71
21.62
Efficiency
0.84
0.86
0.88
0.89
0.89
0.90
0.82
0.85
0.87
0.88
0.88
0.89
0.90
0.81
0.84
0.86
0.87
0.88
0.89
0.89
0.80
0.84
0.86
0.87
0.88
0.89
0.89
Type RV - Ground screws
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
19.3
17.4
15.9
15.0
15.2
13.9
47.8
43.7
40.2
37.1
38.4
38.2
42.9
51.1
46.9
43.2
39.9
41.5
41.4
46.7
54.4
50.0
46.2
42.7
44.4
44.6
50.3
26.3
27.3
27.6
27.8
27.3
25.3
59.7
63.3
64.3
64.0
64.0
64.0
61.9
63.5
67.7
68.9
68.8
69.0
69.3
67.2
67.2
71.9
73.5
73.5
73.9
74.5
72.4
[N 2/3 /µm]
F K
51.1
41.5
35.7
32.2
29.2
24.4
80.3
64.9
55.7
49.1
44.8
39.2
34.7
81.5
65.7
56.5
49.8
45.3
39.7
35.1
82.7
66.5
57.2
50.4
45.9
40.2
35.6
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
12.2
10.9
10.0
9.4
9.6
8.7
30.1
27.6
25.3
23.4
24.2
24.1
27.0
32.2
29.6
27.2
25.2
26.1
26.1
29.4
34.3
31.5
29.1
26.9
28.0
28.1
31.7
- 23 -
13.2
13.6
13.8
13.9
13.6
12.6
29.8
31.7
32.2
32.0
32.0
32.0
30.9
31.8
33.8
34.5
34.4
34.5
34.6
33.6
33.6
36.0
36.8
36.8
36.9
37.2
36.2
[N 2/3 /µm]
32.2
26.1
22.5
20.3
18.4
15.4
50.6
40.9
35.1
31.0
28.2
24.7
21.9
51.4
41.4
35.6
31.4
28.6
25.0
22.1
52.1
41.9
36.1
31.8
28.9
25.3
22.4
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
600
460
370
310
270
210
1070
840
700
590
520
410
340
1290
1030
850
730
630
500
420
1490
1200
1000
860
750
600
500
Maximum backlash of single nuts: 0.03mm (can be reduced on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
10
10
10
10
10
10
20
20
20
20
20
20
20
25
25
25
25
25
25
25
30
30
30
30
30
30
30
[mm]
D1
34
34
34
34
34
34
42
42
42
42
42
42
42
45
45
45
45
45
45
45
45
45
45
45
45
45
45
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
56
56
56
56
56
56
64
64
64
64
64
64
64
68
68
68
68
68
68
68
67
67
67
67
67
67
67
35
35
35
35
35
35
55
55
55
55
55
55
55
54
54
54
54
54
54
54
55
55
55
55
55
55
55
51
51
51
51
51
51
65
65
65
65
65
65
65
64
64
64
64
64
64
64
65
65
65
65
65
65
65
Fk -------- Rigidity factor
Fv -------- Preloading force
35.7
35.7
35.7
35.7
35.7
35.7
43.7
43.7
43.7
43.7
43.7
43.7
43.7
47
47
47
47
47
47
47
46.7
46.7
46.7
46.7
46.7
46.7
46.7
14
14
14
14
14
14
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
4
4
4
4
4
4
4
Mv ------ Load-free torque due to preloading

Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
25 x 2
25 x 4
25 x 5
25 x 6
25 x 8
25 x 10
27 x 2
27 x 4
27 x 5
27 x 6
27 x 8
27 x 10
30 x 2
30 x 4
30 x 5
30 x 6
30 x 8
30 x 10
30 x 15
30 x 20
30 x 30
36 x 2
36 x 4
36 x 5
36 x 6
36 x 8
36 x 10
36 x 15
36 x 20
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
[mm]
24
24
24
24
24
24
27
27
27
27
27
27
30
30
30
30
30
30
30
30
30
36
36
36
36
36
36
36
36
[mm]
24.14
24.28
24.34
24.40
24.51
24.60
27.14
27.29
27.37
27.40
27.51
27.62
30.15
30.29
30.37
30.40
30.52
30.63
30.87
31.05
31.27
36.15
36.28
36.37
36.41
36.54
36.65
36.80
37.12
[mm]
Efficiency
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
Maximum backlash of single nuts: 0.03mm (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
23.82
23.63
23.53
23.42
23.21
22.98
26.82
26.65
26.56
26.43
26.22
26.00
29.82
29.65
29.56
29.43
29.22
29.01
28.44
27.81
26.41
35.83
35.63
35.56
35.44
35.24
35.12
34.48
33.88
0.80
0.85
0.87
0.87
0.89
0.89
0.78
0.85
0.86
0.87
0.88
0.89
0.77
0.84
0.85
0.86
0.88
0.89
0.90
0.90
0.90
0.75
0.82
0.84
0.85
0.87
0.88
0.89
0.90
Type RV - Ground screws
78.0
66.5
62.5
64.4
75.3
84.1
87.8
74.5
70.3
72.6
85.3
95.7
112.4
96.9
90.7
85.5
80.0
88.1
91.6
106.7
49.1
107.2
91.9
88.9
83.3
76.9
70.9
94.8
105.1
93.2
102.6
104.2
103.9
104.8
103.6
103.5
114.2
116.4
116.4
118.2
117.4
129.1
145.4
147.5
148.2
152.3
150.6
143.2
153.8
85.5
124.1
140.9
147.4
147.8
150.5
149.8
151.4
155.8
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
[N 2/3 /µm]
F K
100.5
69.5
61.9
55.9
48.7
43.6
103.4
71.0
63.3
57.1
49.6
44.5
116.2
79.8
70.9
64.1
55.8
49.6
39.9
35.2
20.9
107.1
73.1
65.5
59.1
50.8
45.0
37.4
31.6
49.1
41.9
39.4
40.6
47.5
53.0
55.3
46.9
44.3
45.7
53.8
60.3
70.8
61.0
57.2
53.9
50.4
55.5
57.7
67.2
31.0
67.5
57.9
56.0
52.5
48.5
44.7
59.7
66.2
- 24 -
46.6
51.3
52.1
51.9
52.4
51.8
51.7
57.1
58.2
58.2
59.1
58.7
64.5
72.7
73.8
74.1
76.2
75.3
71.6
76.9
42.8
62.1
70.5
73.7
73.9
75.3
74.9
75.7
77.9
[N 2/3 /µm]
63.3
43.8
39.0
35.2
30.7
27.5
65.2
44.7
39.9
36.0
31.2
28.0
73.2
50.3
44.6
40.4
35.2
31.3
25.1
22.2
13.2
67.4
46.1
41.2
37.2
32.0
28.3
23.6
19.9
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
1690
1140
980
860
690
570
1810
1250
1080
950
770
640
2130
1500
1300
1150
940
790
560
440
295
2490
1800
1580
1410
1160
980
710
560
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
35
35
35
35
35
35
40
40
40
40
40
40
50
50
50
50
50
50
50
50
50
65
65
65
65
65
65
65
65
[mm]
D1
53
53
53
53
53
53
53
53
53
53
53
53
62
62
62
62
62
62
62
62
62
74
74
74
74
74
74
74
74
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
84
84
84
84
84
84
83
83
83
83
83
83
92
92
92
92
92
92
92
92
58
110
110
110
110
110
110
110
110
64
64
64
64
64
64
65
65
65
65
65
65
71
71
71
71
71
71
71
71
71
70
70
70
70
70
70
70
70
78
78
78
78
78
78
79
79
79
79
79
79
85
85
85
85
85
85
85
85
85
84
84
84
84
84
84
84
84
Fk -------- Rigidity factor
Fv -------- Preloading force
55.5
55.5
55.5
55.5
55.5
55.5
55.2
55.2
55.2
55.2
55.2
55.2
64.7
64.7
64.7
64.7
64.7
64.7
64.7
64.7
64.7
76.7
76.7
76.7
76.7
76.7
76.7
76.7
76.7
25
25
25
25
25
25
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
28
28
28
28
28
28
28
28
6
6
6
6
6
6
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
Mv ------ Load-free torque due to preloading

Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
39 x 2
39 x 4
39 x 5
39 x 6
39 x 8
39 x 10
39 x 15
39 x 20
39 x 25
44 x 6
44 x 12
44 x 18
44 x 24
44 x 30
48 x 5
48 x 10
48 x 15
48 x 20
48 x 25
48 x 30
48 x 5
48 x 6
48 x 8
48 x 10
48 x 12
48 x 15
48 x 18
48 x 20
48 x 24
5
5
5
5
5
5
5
5
5
6
6
6
6
6
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
[mm]
39
39
39
39
39
39
39
39
39
44
44
44
44
44
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
[mm]
39.15
39.29
39.35
39.42
39.54
39.74
39.92
40.15
40.50
44.35
44.65
44.90
45.12
45.28
48.35
48.67
48.99
49.21
49.43
49.62
48.30
48.35
48.46
48.56
48.66
48.79
48.92
49.00
49.15
[mm]
38.82
38.65
38.54
38.44
38.24
38.12
37.49
36.90
36.80
43.54
43.03
42.47
41.88
41.23
47.54
47.05
46.53
45.97
45.38
44.75
47.63
47.54
47.38
47.21
47.04
46.76
46.49
46.30
45.91
Efficiency
0.73
0.82
0.84
0.85
0.87
0.88
0.89
0.90
0.90
0.84
0.88
0.89
0.90
0.90
0.82
0.87
0.88
0.89
0.90
0.89
0.82
0.84
0.86
0.87
0.88
0.88
0.89
0.89
0.90
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
181.4
156.8
150.2
142.5
131.9
124.4
137.8
143.7
142.3
122.0
133.8
136.3
139.2
137.3
247.0
207.6
219.3
223.3
240.5
171.7
243.6
236.1
220.7
206.6
217.6
224.2
225.4
226.9
260.4
197.0
226.2
235.2
238.4
243.7
247.4
241.1
265.5
251.7
231.2
240.5
236.7
229.8
237.4
383.8
412.7
415.7
473.4
448.4
407..5
418.4
431.7
442.7
443.6
447.9
450.1
438.3
495.7
485.0
[N 2/3 /µm]
F K
142.1
97.5
86.4
78.5
67.7
60.5
48.9
42.9
38.2
88.4
61.8
50.5
43.9
38.9
111.6
77.5
62.9
55.9
49.2
43.1
142.0
129.5
111.4
98.3
89.8
80.6
72.7
70.3
64.2
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
114.3
98.8
94.6
89.8
83.1
78.3
86.8
90.6
89.7
76.8
84.3
85.9
87.7
86.5
155.6
130.8
138.1
140.7
151.5
108.1
153.5
148.7
139.0
130.2
137.1
141.3
142.0
143.0
164.1
- 25 -
98.5
113.1
117.6
119.2
121.8
123.7
120.5
132.8
125.9
115.6
120.3
118.3
114.9
118.7
191.9
206.4
207.9
236.7
224.2
203.7
209.2
215.8
221.4
221.8
224.0
225.0
219.2
247.9
242.5
[N 2/3 /µm]
89.5
61.5
54.5
49.5
42.7
38.1
30.8
27.0
24.0
55.7
39.0
31.8
27.6
24.5
70.3
48.8
39.6
35.2
31.0
27.2
89.5
81.6
70.2
61.9
56.6
50.7
45.8
44.3
40.5
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
2910
2140
1890
1690
1390
1190
860
680
550
2030
1270
920
720
590
2580
1680
1240
980
810
690
2600
2350
1970
1700
1490
1260
1090
1000
850
Maximum backlash of single nuts: 0.03mm (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
Type RV - Ground screws
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
80
80
80
80
80
80
80
80
80
100
100
100
100
100
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
[mm]
D1
80
80
80
80
80
80
80
80
80
80
80
80
80
80
100
100
100
100
100
100
86
86
86
86
86
86
86
86
86
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
116
116
116
116
116
116
116
116
116
118
118
118
118
118
150
150
150
150
150
150
122
122
122
122
122
122
122
122
122
90
90
90
90
90
90
90
90
90
80
80
80
80
80
113
113
113
113
113
113
113
113
113
113
113
113
113
113
113
100
100
100
100
100
100
100
100
100
90
90
90
90
90
127
127
127
127
127
127
127
127
127
127
127
127
127
127
127
Fk -------- Rigidity factor
Fv -------- Preloading force
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
82.7
103
103
103
103
103
103
88.7
88.7
88.7
88.7
88.7
88.7
88.7
88.7
88.7
28
28
28
28
28
28
28
28
28
28
28
28
28
28
45
45
45
45
45
45
45
45
45
45
45
45
45
45
45
6
6
6
6
6
6
6
6
6
6
6
6
6
6
8
8
8
8
8
8
6
6
6
6
6
6
6
6
6
Mv ------ Load-free torque due to preloading

Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
51 x 5
51 x 10
51 x 15
51 x 20
51 x 25
60 x 15
60 x 20
60 x 25
60 x 30
60 x 6
60 x 10
60 x 12
60 x 18
60 x 20
60 x 30
60 x 42
64 x 6
64 x 12
64 x 18
64 x 24
64 x 30
64 x 36
70 x 6
70 x 12
70 x 18
70 x 24
75 x 5
75 x 10
75 x 15
75 x 15
75 x 20
75 x 20
75 x 25
75 x 30
5
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
5
5
5
5
5
5
5
5
[mm]
51
51
51
51
51
60
60
60
60
60
60
60
60
60
60
60
64
64
64
64
64
64
69
69
69
69
75
75
75
75
75
75
75
75
[mm]
51.36
51.74
51.96
52.23
52.46
60.99
61.26
61.51
61.74
60.37
60.61
60.67
60.96
61.04
61.43
61.78
64.36
64.68
64.97
65.23
65.46
65.65
69.36
69.68
69.98
70.25
75.36
75.70
76.01
76.01
76.31
76.31
76.58
76.83
[mm]
Efficiency
with backlash
and double nut
[kN]
[kN] Single nut,
C Co
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
- 26 -
[N 2/3 /µm]
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
Maximum backlash of single nuts: 0.03mm for RV 51 and 0.04mm for RV 60 to RV 75 (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
50.55
50.12
49.53
48.99
48.41
58.55
58.02
57.46
56.87
59.56
59.27
59.05
58.53
58.34
57.38
56.10
63.55
63.06
62.54
61.99
61.41
60.79
68.55
68.06
67.55
67.01
74.55
74.08
73.58
73.58
73.07
73.07
72.53
71.97
0.81
0.86
0.88
0.89
0.90
0.87
0.88
0.89
0.89
0.82
0.86
0.87
0.88
0.89
0.90
0.90
0.81
0.86
0.88
0.89
0.90
0.90
0.80
0.86
0.88
0.89
0.77
0.84
0.86
0.86
0.88
0.87
0.88
0.89
Type RV - Ground screws
273.1
227.0
244.2
294.1
296.1
497.3
444.4
402.3
367.2
257.7
231.1
221.3
214.9
265.4
284.5
245.2
307.3
264.7
238.1
269.6
265.3
276.7
406.6
347.6
310.1
338.1
568.4
525.3
469.6
643.8
492.3
569.8
525.3
481.1
420.6
449.2
460.6
505.8
514.6
1211.8
1191.0
1163.9
1134.5
474.9
504.7
510.8
507.3
594.7
530.5
500.8
558.6
604.9
612.3
682.8
658.5
667.3
724.0
781.9
786.9
773.9
918.0
1227.0
1261.0
1862.3
1265.0
1812.8
1798.9
1754.3
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
[N 2/3 /µm]
F K
116.2
79.8
65.2
56.5
52.0
97.2
184.1
75.3
69.1
127.0
97.2
88.3
71.2
70.0
54.6
46.4
138.5
96.2
78.0
68.2
60.7
57.0
160.5
110.5
89.0
76.5
171.8
121.0
97.9
115.3
84.6
98.7
88.5
80.6
172.0
143.0
153.9
185.3
186.5
-
-
-
-
162.3
145.6
139.4
135.4
167.2
179.2
154.5
193.6
166.8
150.0
169.9
167.1
174.3
-
-
-
-
-
-
-
-
-
-
-
-
210.3
224.6
230.3
252.9
257.3
-
-
-
-
237.5
252.3
255.4
253.6
297.4
265.3
250.4
279.3
302.4
306.1
341.4
329.2
333.7
-
-
-
-
-
-
-
-
-
-
-
-
73.2
50.3
41.1
35.6
32.7
-
-
-
-
80.0
61.3
55.6
44.8
44.1
34.4
29.3
87.2
60.6
49.1
42.9
38.2
35.9
-
-
-
-
-
-
-
-
-
-
-
-
2930
1920
1430
1140
940
-
-
-
-
3190
2360
2090
1550
1430
1020
760
3430
2280
1700
1360
1130
960
-
-
-
-
-
-
-
-
-
-
-
-
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
140
140
140
140
140
-
-
-
-
180
180
180
180
180
180
180
200
200
200
200
200
200
-
-
-
-
-
-
-
-
-
-
-
-
[mm]
D1
102
102
102
102
102
122
122
122
122
110
110
110
110
110
110
110
115
115
115
115
115
115
130
130
130
130
150
150
150
150
150
150
150
150
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
147
147
147
147
147
166
166
166
166
150
150
150
150
150
150
150
180
180
180
180
180
180
172
172
172
172
210
210
210
195
195
195
195
195
125
125
125
125
125
-
-
-
-
106
106
106
106
106
106
106
118
118
118
118
118
118
140
140
140
140
175
175
175
-
175
-
-
-
139
139
139
139
139
189
189
189
189
124
124
124
124
124
124
124
129
129
129
129
129
129
170
170
170
170
191
191
191
233
191
233
233
233
Fk -------- Rigidity factor
Fv -------- Preloading force
105
105
105
105
105
-
-
-
-
113.2
113.2
113.2
113.2
113.2
113.2
113.2
118
118
118
118
118
118
133.7
133.7
133.7
133.7
153
153
153
-
153
-
-
-
50
50
50
50
50
-
-
-
-
40
40
40
40
40
40
40
45
45
45
45
45
45
50
50
50
50
63
63
63
-
63
-
-
-
8
8
8
8
8
-
-
-
-
8
8
8
8
8
8
8
8
8
8
8
8
8
10
10
10
10
10
10
10
-
10
-
-
-
Mv ------ Load-free torque due to preloading
High capacity definition

[mm]
[mm]
[mm]
Type D X P N d0 d1 d2
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
RV
80 x 6
80 x 8
80 x 10
80 x 12
80 x 18
80 x 20
80 x 24
80 x 30
80 x 36
92 x 12
92 x 18
92 x 24
100 x 15
100 x 15
100 x 20
100 x 20
100 x 25
100 x 35
100 x 18
100 x 24
100 x 30
120 x 15
120 x 15
120 x 20
120 x 20
120 x 25
120 x 25
120 x 30
120 x 18
120 x 24
120 x 30
135 x 15
135 x 20
135 x 25
135 x 30
150 x 15
150 x 20
150 x 25
150 x 30
6
6
6
6
6
6
6
6
6
6
6
6
5
5
5
5
5
5
6
6
6
5
5
5
5
5
5
5
6
6
6
5
5
5
5
5
5
5
5
80
80
80
80
80
80
80
80
80
92
92
92
99
99
99
99
99
99
100
100
100
120
120
120
120
120
120
120
120
120
120
135
135
135
135
150
150
150
150
Efficiency
Type RV - Ground screws
with backlash
and double nut
[kN]
[kN] Single nut,
C Co
[N 2/3 /µm]
F K
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
- 27 -
[N 2/3 /µm]
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
Maximum backlash of single nuts: 0.04mm for RV 80 to RV 92 and 0.05mm for RV 100 to RV 150 (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
80.37 79.56
80.49 79.41
80.61 79.27
80.74 79.12
81.00 78.56
81.09 78.39
81.28 78.04
81.53 77.48
81.77 76.91
92.69 91.08
93.01 90.58
93.30 90.07
100.04 97.61
100.04 97.61
100.35 97.11
100.35 97.11
100.65 96.60
101.23 95.52
101.02 98.60
101.32 98.08
101.60 97.55
121.00 118.62
121.00 118.62
121.37 118.13
121.37 118.13
121.68 117.63
121.68 117.63
121.98 117.11
121.04 118.61
121.30 118.10
121.64 117.59
136.06 133.62
126.38 133.14
136.70 132.65
137.00 132.14
151.06 148.63
151.39 148.15
151.71 147.66
152.02 147.10
0.79 399.8 738.9 154.2
0.82 375.3 771.9 131.7
0.84 384.8 942.1 119.3
0.85 374.0 968.5 109.5
0.87 394.5 962.3 87.4
0.88 411.3 954.6 82.4
0.88 423.1 957.0 75.7
0.89 426.9 954.6 68.2
0.89 399.4 860.2 59.0
0.84 751.0 1791.0 169.8
0.86 817.0 1844.0 137.2
0.88 879.0 1850.0 118.0
0.85 904.0 2581.0 139.9
0.84 983.3 3533.0 155.5
0.87 829.0 2609.0 119.8
0.86 895.8 3545.0 133.5
0.88 858.0 2646.0 107.6
0.89 893.0 2598.0 90.8
0.86 751.0 1921.0 124.8
0.87 793.0 1891.0 106.0
0.88 814.0 1923.0 96.4
0.83 1135.0 3414.0 155.2
0.83 1172.0 4645.0 171.7
0.85 1042.0 3466.0 133.1
0.85 1071.0 4683.0 146.7
0.87 986.0 3535.0 119.1
0.87 1011.0 4764.0 132.0
0.87 945.0 4726.0 120.4
0.85 778.0 2534.0 138.6
0.87 786.0 2537.0 118.4
0.88 818.0 2577.0 106.5
0.82 1393.0 6033.0 194.3
0.84 1284.0 6145.0 167.0
0.86 1214.0 6264.0 149.8
0.86 1122.0 6154.0 134.9
0.81 1536.0 7285.0 210.5
0.83 1426.0 7481.0 181.9
0.85 1337.0 7571.0 161.7
0.86 1263.0 7601.0 147.3
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[mm]
D1
138
138
138
138
138
138
138
138
138
160
160
160
200
200
200
200
200
200
185
185
185
240
240
240
240
240
240
240
220
220
220
280
280
280
280
320
320
320
320
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
180
180
180
180
180
180
180
180
180
220
220
220
245
245
245
245
245
245
260
260
260
300
300
300
300
300
300
300
260
260
260
345
345
345
345
385
385
385
385
130
130
130
130
130
130
130
130
130
210
210
210
260
-
260
-
260
260
230
230
230
280
-
280
-
280
-
-
230
230
230
-
-
-
-
-
-
-
-
158
158
158
158
158
158
158
158
158
234
234
234
281
304
281
304
281
281
260
260
260
300
354
300
354
300
354
354
260
260
260
393
393
393
393
437
437
437
437
Fk -------- Rigidity factor
Fv -------- Preloading force
141.7
141.7
141.7
141.7
141.7
141.7
141.7
141.7
141.7
163.7
163.7
163.7
203
-
203
-
203
203
188
188
188
243
-
243
-
243
-
-
223
223
223
-
-
-
-
-
-
-
-
50
50
50
50
50
50
50
50
50
63
63
63
63
-
63
-
63
63
63
63
63
100
-
100
-
100
-
-
100
100
100
-
-
-
-
-
-
-
-
10
10
10
10
10
10
10
10
10
10
10
10
10
-
10
-
10
10
10
10
10
10
-
10
-
10
-
-
10
10
10
-
-
-
-
-
-
-
-
Mv ------ Load-free torque due to preloading
High capacity definition

Type D X P N d0 d1 d2
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
BRV
8 x 5
12 x 4
12 x 5
15 x 4
15 x 5
20 x 5
20 x 10
23 x 4
23 x 5
23 x 10
27 x 5
27 x 10
30 x 10
39 x 10
39 x 25
44 x 30
4
5
5
5
5
5
5
5
5
5
5
5
5
5
5
6
[mm]
8
12
12
15
15
19.5
19.5
22.5
22.5
22.5
27
27
30
39
39
44
[mm]
8.3
12.25
12.32
15.25
15.32
19.83
20.04
22.79
22.87
23.12
27.37
27.62
30.63
39.74
40.50
45.28
[mm]
Efficiency
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
- 28 -
[N 2/3 /µm]
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
Maximum backlash of single nuts: 0.03mm for BRV 8 and 0.04mm for BRV 12 and BRV 44 (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
7.45
11.65
11.56
15.65
15.56
19.02
18.62
22.15
22.06
21.62
26.56
26.00
29.01
38.12
36.80
41.23
0.89
0.89
0.89
0.88
0.89
0.88
0.89
0.86
0.87
0.89
0.86
0.89
0.89
0.88
0.90
0.90
Type BRV - Rolled screws
4.1
7.0
7.3
11.2
10.5
25.9
20.0
32.3
29.9
23.5
49.2
67.0
61.7
87.1
99.6
96.1
7.5
12.5
12.7
19.3
19.5
44.8
43.3
51.5
51.5
50.7
81.5
82.2
105.4
173.2
176.2
166.2
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
[N 2/3 /µm]
F K
14,9
23.6
21.5
28.2
25.4
38.7
34.7
45.1
39.8
28.0
49.9
35.1
39.1
47.7
30.1
38.9
2.6
4.4
4.6
7.0
6.6
16.3
12.6
20.3
18.8
14.7
30.9
42.22
38.8
54.8
62.7
60.5
3.7
6.2
6.3
9.6
9.7
22.3
21.7
25.7
25.7
25.3
40.7
41.0
52.7
86.5
88.1
83.0
9.4
14.8
13.5
17.7
16.0
24.4
21.9
28.4
25.1
17.7
31.5
22.1
24.6
30.1
19.0
24.5
170
310
260
370
310
590
340
1000
860
500
1080
640
790
1190
550
590
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
5
8
8
10
10
20
20
30
30
30
40
40
50
80
80
100
[mm]
D1
21
26
26
34
34
42
42
45
45
45
53
53
62
80
80
80
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
41
46
46
56
56
64
64
67
67
67
83
83
92
116
116
118
31
31
31
35
35
55
55
55
55
55
65
65
71
90
90
80
41
41
41
51
51
65
65
65
65
65
79
79
85
100
100
90
Fk -------- Rigidity factor
Fv -------- Preloading force
22.3
27.3
27.3
35.7
35.7
43.7
43.7
46.7
46.7
46.7
55.2
55.2
64.7
82.7
82.7
82.7
10
10
10
14
14
20
20
20
20
20
20
20
20
28
28
28
3
3
3
4
4
4
4
4
4
4
5
5
6
6
6
6
Mv ------ Load-free torque due to preloading

Type D X P N d0 d1 d2
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
8 x 0.25
8 x 0.5
8 X 1
8 X 2
10 x 0.5
10 X 1
10 X 2
12 x 0.5
12 X 1
12 X 2
16 x 0.5
16 X 1
16 X 2
20 X 0.5
20 X 1
20 X 2
25 X 1
25 X 2
32 X 1
32 X 2
40 X 1
40 X 2
50 X 1
50 X 2
50 X 3
50 X 4
63 X 2
63 X 3
63 X 4
80 X 2
80 X 3
80 X 4
100 X 3
100 X 4
100 X 5
125 x 5
1
1
1
2
1
1
2
1
1
2
1
1
2
1
1
2
1
2
1
2
1
2
1
2
2
2
1
1
2
1
1
2
1
1
1
1
[mm]
Type RVR - Ground screws - System with rollers’ recycling
[mm]
[mm]
7.80 8.00 7.69
7.80 8.00 7.58
7.63 8.00 7.19
7.63 8.00 7.19
9.63 10.00 9.41
9.63 10.00 9.19
9.63 10.00 9.19
11.98 12.00 11.58
11.63 12.00 11.19
11.63 12.00 11.19
15.66 16.03 15.22
16.00 16.37 15.56
16.00 16.37 15.56
19.36 19.55 19.14
19.63 20.00 19.19
19.63 20.00 19.19
25.00 25.37 24.56
25.00 25.37 24.56
32.00 32.37 31.56
32.00 32.37 31.56
39.63 40.00 39.19
39.63 40.00 39.19
49.63 50.00 49.19
49.63 50.00 49.19
49.45 50.00 48.79
49.26 50.00 48.38
62.26 63.00 61.38
62.00 63.00 60.68
62.26 63.00 61.38
79.26 80.00 78.38
79.00 80.00 77.68
78.52 80.00 76.76
98.89 100.00 97.57
98.52 100.00 96.76
98.15 100.00 95.95
123.15 125.00120.95
Efficiency
Single nut,
[kN]
[kN]
with backlash
and double nut
C Co
[N 2/3 /µm]
F K
[kN]
Split nut,
preloaded,
without
backlash
[kN]
C Co F K
- 29 -
[N 2/3 /µm]
Split nuts,
preloaded,
preloading
torque
[N]
[Ncm]
Fv Mv
Maximum backlash of single nuts: 0.03mm for RVR 8 to RVR 40 and 0.04mm for RVR 50 to RVR 125 (can be less on request).
If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).
Terms used in tables
0.66
0.77
0.84
0.88
0.74
0.82
0.87
0.71
0.80
0.86
0.77
0.77
0.84
0.61
0.74
0.82
0.70
0.80
0.65
0.77
0.61
0.74
0.56
0.70
0.76
0.80
0.66
0.73
0.77
0.61
0.69
0.74
0.65
0.70
0.74
0.70
12.5
10.2
8.0
8.0
11.3
8.9
8.9
10.5
10.1
10.1
11.7
11.1
11.1
24.8
17.6
17.6
30.4
30.4
65.1
65.1
83.5
83.5
161.8
161.8
142.7
132.4
197.8
170.2
197.8
360.7
320.7
360.9
492.0
447.7
485.6
856
12.1
12.8
12.1
12.1
15.1
14.4
14.4
13.6
17.4
17.3
21.7
21.0
21.0
37.9
36.1
36.1
70.0
70.0
121.3
121.3
180.7
180.7
326.1
326.1
331.1
333.9
486.2
470.1
486.1
835.6
844.2
834.4
1276
1258
1431
3102
P ---------- Lead
D --------- Reference diameter
N --------- Number of starts
d0 ------- Nominal diameter
47.9
33.3
23.3
23.3
35.7
25.0
25.0
32.3
27.4
27.4
29.9
29.6
29.6
57.0
41.2
41.2
53.6
53.6
67.0
67.0
78.3
78.3
101.3
101.3
81.8
71.0
79.5
63.5
79.5
121.0
98.2
121.0
101.1
87.1
86.1
126.2
7.9
6.4
5.1
5.1
7.1
5.6
5.6
6.6
6.3
6.3
7.3
7.0
7.0
15.7
11.1
11.1
19.2
19.2
41.0
41.0
52.6
52.6
102.0
101.9
89.9
83.4
124.6
107.2
124.6
-
-
-
-
-
-
-
6.1
6.4
6.0
6.0
7.5
7.2
7.2
6.8
8.7
8.7
10.9
10.5
10.5
18.9
18.1
18.1
35.0
35.0
60.7
60.6
90.3
90.3
163.0
163.0
165.6
167.0
243.1
235.1
243.0
-
-
-
-
-
-
-
30.2
21.0
14.7
14.7
22.5
15.8
15.8
20.4
17.2
17.2
18.8
18.7
18.7
35.9
25.9
25.9
33.8
33.8
42.2
42.2
49.3
49.3
63.8
63.8
51.5
44.8
50.1
40.0
50.1
-
-
-
-
-
-
-
1250
1000
730
460
1200
880
570
1300
1000
670
1270
1250
890
1800
1470
1080
1870
1440
2600
2080
3090
2550
3320
2820
2460
2180
3190
2840
2540
-
-
-
-
-
-
-
d1 ------- External diameter
d2 ------- Thread bottom diameter
C --------- Dynamic load capacity
Co ------- Static load capacity
6
6
6
6
8
8
8
10
10
10
15
15
15
20
20
20
30
30
50
50
70
70
90
90
90
90
120
120
120
-
-
-
-
-
-
-
[mm]
D1
19
19
20
20
22
22
22
24
24
24
29
29
29
34
34
34
42
42
53
53
70
70
82
82
82
82
105
105
105
138
138
138
170
170
170
220
[mm]
[mm] Without
wipers
With
wipers
[mm]
[mm]
[mm]
[mm]
D2 L1 L1 L2 L3 L4
42
42
43
43
43
43
43
46
46
46
53
53
53
56
56
56
67
67
83
83
104
104
124
124
124
124
148
148
148
195
195
195
230
230
230
260
31
31
31
31
31
31
31
31
31
31
31
31
31
37
37
37
44
44
55
55
66
66
80
80
80
80
110
110
110
175
175
175
180
180
195
262
41
41
41
41
41
41
41
41
41
41
41
41
41
47
47
47
54
54
67
67
80
80
94
94
94
94
124
124
124
189
189
189
196
196
215
282
Fk -------- Rigidity factor
Fv -------- Preloading force
19.8
19.8
20.8
20.8
22.8
22.8
22.8
25.3
25.3
25.3
32.7
32.7
32.7
35.7
35.7
35.7
43.7
43.7
55.2
55.2
72.7
72.7
84.7
84.7
84.7
84.7
105.2
105.2
105.2
141.7
141.7
141.7
173.7
173.7
173.7
223
10
10
12
12
12
12
12
10
10
10
14
14
14
14
14
14
14
14
20
20
28
28
28
28
28
28
40
40
40
50
50
50
56
56
56
100
2
2
2
2
2
2
2
3
3
3
4
4
4
4
4
4
4
4
5
5
6
6
6
6
6
6
8
8
8
10
10
10
12
12
12
12
Mv ------ Load-free torque due to preloading

Applications
The great flexibility of Rollvis SA means it can make all types of screws and nuts as shown
in the examples below:
RV 26 x 4,5
RV 15 x 10
- 30 -
RV 30 x 2
RV 8 x 2

RV 14 x 2
RVR 17 x 2
- 31 -
RV 40 x 5
RV 20 x 8,5

Applications (ctd.)
RVR 32 x 1
- 32 -
RV 17 x 9
RV 45 x 9

Quality assurance
ROLLVIS SA is certified
ISO 9001/2000
and ASD-EASE
according to EN9100

ROLLVIS SA
136, ch. du Pont-du-Centenaire
CH-1228 Plan-les-Ouates
GENEVA - SWITZERLAND
Correspondence: CP 590
CH - 1212 Grand-Lancy 1
GENEVA - SWITZERLAND
Phone: +41 (0)22 706 90 40
Fax: +41 (0)22 706 90 49
E-mail: info@rollvis.com
Website: www.rollvis.com
Your nearest agent