LINEAR MOTION SYSTEMS

Redi-Rail ® Steel Linear Guides
Technical Information
Linear Motion Systems
SIZING CONTROL
When the positioning and configuration of rails and slides
or rollers is determined, it is necessary to verify the correct
sizing of system components, for both static and dynamic
function. With regard to the static verification, it is necessary
to determine the load applied onto each single slide. When the
heaviest loaded slide is identified, the safety coefficient must
be calculated on that slide and the result must be compared
with the maximum static load capacity.
When the load applied is the result of a sum of radial and
axial loads as well as moments, it is necessary to calculate the
value of each component and verify the following:
For system sizing of Steel Linear Slides, only the axial (Pax)
and radial (Prad) load components must be taken into
consideration. As a result, it is sufficient to calculate the
following:
MAINTENANCE
The roller’s internal elements are lubricated and protected by
double lip seals (2RS). As a result, they are maintenance free.
The sliders of the Steel Linear Guide systems are equipped
with lateral seals and a system of strong rail wipers, which
incorporate a lubrication system, assuring a release of
lubricating oil on the raceways overtime. This gives a
maintenance free system for the entire lifetime, under normal
clean operational environment.
A similar rail wiper and lubrication system is also standard
assembled on the entire system of Drawer Slides of the
Precision/RDR series.
In case the wipers with integrated lubrication system is
disassembled, it is necessary to provide a periodic manual
lubrication of the raceways, to assure a sufficient lubrication
on the contact areas. In addition, it is also necessary to
regularly clean the raceways for impurities or other residues.
For lubrication we recommend to apply standard lithium
grease lubrication, specific for ball bearings.
CORROSION RESISTANCE
Co rad
Pax
Mx
P
Prad
Where:
Pax = axial load component
Prad = radial load component
Mx, My, Mz = applied moments
Co ax = axial load capacity
Co rad = radial load capacity
Mox, Moy, Moz = resistance capacity to moments
Z = safety coefficient 1
Co ax
All Steel and Flexible rails have a surface treatment, which
ensures the hardness and offers a high resistance to
corrosion. As the surface treatment is carried out after
working the raceways, the complete surface has a high
corrosion protection also on the raceways. The treatment
gives the rails an overall black finish.
In comparison to traditional electrolytic galvanization zinc
plating, this surface treatment offer a much better corrosion
resistance protection of the rails, which usually are more
exposed to corrosion than the sliders.
All sliders and intermediate plate in RDR drawer slides have
an electrolytic zinc platting surface treatment.
ADDITIONAL TECHNICAL INFORMATION
Any further technical product information or questions
about their correct installation, may be requested from our
Application Engineers.
Technical Infomation
It is recommended to apply the following values to safety
coeffi cient Z:
Z
1 -1.5
APPLICATION CONDITIONS
Accurate determination of static and dynamic loads. Precise
assembly, tight structure.
1.5 - 2 Average conditions
2 - 3.5
Insuffi cient determination of applied loads.
Vibrations, loose structure. Imprecise assembly.
Unfavourable environmental conditions.
The data and specifi cations in this publication have been carefully compiled and are believed to be accurate and correct. However, it is the responsibility of the user to
determine and ensure the suitability of Pacifi c Bearing® products for a specifi c application. Pacifi c Bearing’s only obligation will be to repair or replace without charge,
any defective components if returned promptly. No liability is assumed beyond such replacement. *Consult www.pacifi c-bearing.com for the latest technical updates.
800.962.8979 • www.pacific-bearing.com 149