SPANNTOP
SPANNTOP
SPANNTOP
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<strong>SPANNTOP</strong><br />
<strong>SPANNTOP</strong> ® : Systematic clamping<br />
■ outside clamping<br />
■ inside clamping<br />
■ in front of the chuck<br />
02.2007
HAINBUCH. Workholding technology<br />
HAINBUCH manufactures clamping devices. We have been doing it for more than<br />
50 years, and are now in the third generation. The company is headquartered in<br />
Germany. Hainbuch has subsidiaries in France, Italy, Sweden, Thailand, and the<br />
USA. In addition there are several national and international commercial agencies.<br />
The <strong>SPANNTOP</strong> system developed by HAINBUCH is a genuine classic. It is extremely<br />
easy to handle and convincing in implementation: For example in turning centers<br />
and milling centers, on gear cutting machines and grinding machines, or also on<br />
rotary transfer machines and friction welding lathes. Wherever rigidity, precision,<br />
and ease of change-over are required. This is where the strengths offered by the<br />
modular structure really shine.<br />
With <strong>SPANNTOP</strong>, one fits into the other: With its different adaptations the<br />
chuck offers an incredible number of clamping possibilities, which not<br />
only optimizes the production process, it also optimizes the balance sheet.<br />
2
<strong>SPANNTOP</strong>. The original<br />
Drawtube<br />
adapter<br />
<strong>SPANNTOP</strong> chuck<br />
[pages 4 – 11]<br />
■ combi pull-back for chuck<br />
elements and bar work<br />
■ combi deadlength for work<br />
pieces with short collar<br />
■ modular for bar work<br />
Clamping head [page 12]<br />
■ for clamping of raw material<br />
■ for clamping of<br />
finished material<br />
■ machinable to size<br />
Changing fixture<br />
[page 13]<br />
■ manual<br />
■ pneumatic<br />
■ pneumatic-hydraulic<br />
MANDO Adapt [page 14]<br />
Mandrel-in-<strong>SPANNTOP</strong>-chuck<br />
■ for I.D. clamping<br />
?<br />
Often copied, never equaled. <strong>SPANNTOP</strong> is well<br />
thought-out in all the details – from drawtube<br />
adapter to changing fixture. See for yourself:<br />
The advantages of the <strong>SPANNTOP</strong><br />
system<br />
■ rigidity<br />
■ concentric accuracy<br />
■ quick change-over<br />
■ circumferential clamping<br />
■ vibration damping<br />
■ axial draw force against the end-stop<br />
Jaw adapter [page 15]<br />
Jaw-clamping-in-<strong>SPANNTOP</strong>-chuck<br />
■ for clamping in front of the chuck<br />
<strong>SPANNTOP</strong> . The original 3
<strong>SPANNTOP</strong>. Chuck types<br />
<strong>SPANNTOP</strong> chuck<br />
Combi pull-back<br />
With axial fixed end-stop<br />
for chuck elements and a<br />
through-bore capacity for<br />
bar work.<br />
The clamping head pulls<br />
the work piece onto the<br />
end-stop.<br />
<strong>SPANNTOP</strong> chuck<br />
Combi deadlength<br />
With axial fixed clamping<br />
head and end-stop for<br />
chuck elements and<br />
through-bore capacity for<br />
bar work.<br />
<strong>SPANNTOP</strong> chuck<br />
Modular<br />
With a through-bore for<br />
bars and tubes.<br />
4 <strong>SPANNTOP</strong> . Chuck types
Circumferential clamping<br />
Axial force against the end-stop<br />
In particular:<br />
Work pieces can also be<br />
clamped very short.<br />
Circumferential clamping<br />
Radial clamping without<br />
axial movement<br />
In particular:<br />
Work pieces can also be<br />
clamped on a short collar<br />
or shoulder.<br />
Circumferential clamping<br />
Axial tension<br />
Square, hexagon, special profiles<br />
<strong>SPANNTOP</strong> . Chuck types<br />
5
<strong>SPANNTOP</strong> chuck combi pull-back<br />
5<br />
When clamping, the clamping head moves axially to the rear,<br />
so that the work piece is pulled tightly onto the fixed end-stop.<br />
Thus even with the shortest clamping lengths very stable work<br />
piece clamping is achieved. Moreover, the segments of the<br />
clamping head act like wedges between the work piece and<br />
the massive chuck body, and thus ensures rigidity of the entire<br />
clamping device, which greatly increases cutting tool life.<br />
1 6<br />
4<br />
2<br />
3<br />
<strong>SPANNTOP</strong> combi pull-back is ideal<br />
■ as through-bore chuck for bar work<br />
■ as end-stop chuck for chuck work<br />
■ with work pieces that have a short clamping length<br />
1 flange<br />
2 chuck body<br />
3 clamping head<br />
4 torsional safety<br />
5 mounting threads for front end-stop<br />
6 changeable base end-stop [can be<br />
fixed from outside via 3 screws]<br />
The advantages<br />
■ axial draw force against the end-stop, which stabilizes<br />
clamping [important for shorter clamping length]<br />
■ little inertia loss<br />
■ extremely rigid<br />
■ optimal holding power<br />
■ simple mechanics, results in better power conversion<br />
■ clamps work pieces with short clamping length<br />
■ converts to a fully functional »bar chuck« when the<br />
end-stop plate is removed<br />
■ excellent concentricity after clamping head change<br />
[< 0.01 mm]<br />
6 <strong>SPANNTOP</strong> chuck . Combi pull-back
effective<br />
clamping forces<br />
Material: 18CrNi8 / 1.5920<br />
Depth of cut: approx. 1.0 mm<br />
Feed:<br />
0.25 mm/U<br />
Cutting speed:<br />
100 rpm<br />
Significant time savings thanks to fast processing in the<br />
<strong>SPANNTOP</strong> chuck without the use of a center, which is<br />
required with a jaw chuck.<br />
chuck<br />
base end-stop<br />
end-stop<br />
work piece<br />
clamping head<br />
Common-Rail injection nozzle<br />
––––––––––––––––––––––––––––––––<br />
Material: 18CrNi8 / 1.5920<br />
Depth of cut: approx. 1.5 mm<br />
Feed:<br />
0.25 mm/U<br />
Cutting speed:<br />
100 rpm<br />
Typical clamping and processing examples<br />
Common-Rail<br />
sun shaft<br />
front end-stop<br />
coolant supply is possible for<br />
flushing or for air sensing control<br />
depth [end-] stop with/without ejector<br />
<strong>SPANNTOP</strong> Chuck . Combi pull-back<br />
7
<strong>SPANNTOP</strong> chuck combi deadlength<br />
3 5 6<br />
For this type the clamping head is coupled in the chuck and<br />
there is no axial movement.<br />
Tension is introduced through the axial movement of the connecting<br />
sleeve.<br />
Thus the work piece is clamped radially without axial movement.<br />
An interior base end-stop, or a front end-stop mounted on the<br />
front side, can be used here as well.<br />
<strong>SPANNTOP</strong> combi deadlength can be used<br />
■ as through-bore chuck for bar work<br />
■ as end-stop chuck for chuck work<br />
■ for work pieces with a very short collar<br />
1<br />
7<br />
2<br />
4<br />
1 flange<br />
2 chuck body<br />
3 connecting sleeve<br />
4 clamping head<br />
5 torsional safety<br />
6 mounting threads for front end-stop<br />
7 changeable base end-stop [can be<br />
fixed from outside via 3 screws]<br />
The advantages<br />
■ radial clamping without axial movement of the clamping head<br />
■ clamps work pieces on a short collar or shoulder<br />
■ converts to a fully functional »bar chuck« when the end-stop<br />
plate is removed<br />
■ excellent concentricity after clamping head change [< 0.02 mm]<br />
8 <strong>SPANNTOP</strong> chuck . Combi deadlength
The example shows a situation where<br />
the right chuck clamps the part, which is<br />
then cut off.<br />
pull-back<br />
deadlength<br />
Typical clamping and processing examples<br />
A work piece with narrow collar must be<br />
clamped.<br />
Long work piece is pulled forward several<br />
times out of the left chuck and reprocessed.<br />
Thanks to radial clamping only the axial<br />
clearance to the grooves is better maintained.<br />
Work piece transfer with narrow collar is an<br />
ideal application.<br />
short clamping surface<br />
<strong>SPANNTOP</strong> Chuck . Combi deadlength<br />
9
<strong>SPANNTOP</strong> chuck modular<br />
1<br />
2<br />
6<br />
1 mounting threads [e. g. for guide rings]<br />
2 mounting threads for front end-stop<br />
3 clamping head with pull-back effect<br />
4 chuck body<br />
5 torsional safety<br />
6 flange<br />
<strong>SPANNTOP</strong> modular can be used<br />
■ as through-bore chuck for bar work<br />
5<br />
4<br />
3<br />
<strong>SPANNTOP</strong> modular offers up to 35 % more rigidity and up<br />
to 50 % higher clamping forces than conventional collet<br />
chucks. The axial tension produced during the clamping<br />
process draws the clamping head directly into the chuck body.<br />
On the other hand, when using conventional collets the clamping<br />
force pushes the chuck away from the spindle nose, which<br />
significantly decreases rigidity.<br />
With <strong>SPANNTOP</strong> modular not only work piece clamping is<br />
highly stable, but there is also a significant increase of rigidity<br />
of the entire clamping fixture. This in turn has a favorable<br />
effect on tool life.<br />
The advantage of <strong>SPANNTOP</strong> relative to traditional<br />
clamping collet chucks<br />
The clamping force pulls the clamping head to the spindle nose. This<br />
has a significant effect on stability.<br />
<strong>SPANNTOP</strong><br />
The advantages<br />
■ actuating force toward spindle<br />
■ parallel/cylindrical clamping<br />
■ optimal holding power<br />
■ very rigid<br />
■ parallel clamping<br />
■ minimal wear<br />
■ easy change-over<br />
■ concentricity < 0.01 mm<br />
drawtube<br />
force<br />
power flow in one direction<br />
compression force<br />
cutting force<br />
Conventional clamping collet chuck<br />
10 <strong>SPANNTOP</strong> chuck . Modular
<strong>SPANNTOP</strong>. Numbers and facts<br />
Chuck<br />
Size Test length –––––––––––––––––––– Attainable concentric precision –––––––––––––––––<br />
L –––––––––– Round –––––––––– ––––––– Square/hexagon –––––––<br />
Modular, pull-back Deadlength Modular, pull-back Deadlength<br />
32 30 < 0.01 < 0.02 < 0.04 < 0.06<br />
42 30 < 0.01 < 0.02 < 0.04 < 0.06<br />
52 30 < 0.01 < 0.02 < 0.04 < 0.06<br />
65 50 < 0.01 < 0.02 < 0.04 < 0.06<br />
80 50 < 0.01 < 0.02 < 0.04 < 0.06<br />
100 60 < 0.01 < 0.02 < 0.04 < 0.06<br />
125 60 < 0.01 < 0.02 < 0.04 < 0.06<br />
140 60 < 0.01 < 0.02 < 0.04 < 0.06<br />
>160 80 < 0.01<br />
Clamping range clamping heads<br />
Size —> d.max -> D L S Span Opening- Minimum Counter bore to Drawtube force RPM*<br />
capacity chuck range nominal clamping- max. clamping Ø d max. max.<br />
size length t Depth t<br />
32 BZI 32 75 47 6 ± 0.3 + 0.6 8 mm 49 x 6.5 25 000 N 8000 min. -1<br />
32 BZIG/HSW 32 75 44 3 ± 0.3 + 0.6 5 mm 49 x 6.5 25 000 N 8000 min. -1<br />
42 BZI 42 120 47 9 ± 0.5 + 0.6 11mm 68 x 10 35 000 N 7000 min. -1<br />
42 BZIG/HSW 42 120 42 4 ± 0.5 + 0.6 6 mm 68 x 10 35 000 N 7000 min. -1<br />
52 BZI/BZIG/HSW 52 125 46 4 ± 0.5 + 0.6 6 mm 64 x 9 40 000 N 7000 min. -1<br />
65 BZI 65 145 58 9 ± 0.5 + 0.6 11mm 87 x 10 45 000 N 6000 min. -1<br />
65 BZIG/HSW 65 145 53 4 ± 0.5 + 0.6 6 mm 87 x 10 45 000 N 6000 min. -1<br />
80 BZI/BZIG/HSW 80 160 53 4 ± 0.5 + 0.6 6 mm 93 x 11 50 000 N 5500 min. -1<br />
100 BZ/BZG/HSW 100 215 59 0 ± 1.0 + 2.0 2 mm 117.2 x 20 65 000 N 5000 min. -1<br />
120 BZ 120 240 61 3 ± 1.0 + 1.3 5 mm 150 x 18 70 000 N 3200 min. -1<br />
125 BZ/BZG/HSW 127 250 67 4 ± 1.0 + 2.5 6 mm 167 x 18 70 000 N 3200 min. -1<br />
140 BZ 140 265 63 5 ± 1.0 + 1.3 7 mm 166 x 18 100 000 N 3200 min. -1<br />
160 BZ 160 290 63 5 ± 1.0 + 1.3 7 mm 210 x 12 100 000 N 3200 min. -1<br />
* Data only applies if the standard clamping head version is used.<br />
<strong>SPANNTOP</strong> chuck . Numbers and facts<br />
11
The clamping head<br />
Standard<br />
[in stock]<br />
Special profile clamping<br />
possibilities<br />
■<br />
■<br />
■<br />
rigid hardened segments<br />
made of chromium-nickel steel<br />
all function surfaces are<br />
ground in one operation<br />
through continuous research<br />
and development our vulcanizing<br />
process satisfies new<br />
market requirements<br />
Modified lead-in-chamfer for<br />
square and hexagon bars<br />
Standard versions<br />
Clamping of raw<br />
material<br />
BZI<br />
Serrated with gear<br />
tooth system<br />
Clamping of finished<br />
material<br />
BZIG<br />
With smooth clamping surface<br />
for clamping on previously<br />
processed surfaces<br />
Machinable to size<br />
HSW<br />
Machining of the<br />
clamping bore to size<br />
loading ring<br />
Special versions<br />
F<br />
Fine tooth serration for<br />
increased grip, e.g. for<br />
drawn material<br />
Z<br />
Rough tooth serration for<br />
increased grip. e.g. for<br />
rolled material<br />
12 The clamping head
Clamping head change-over<br />
Set-up for ø 60 mm Remove clamping head Clean Insert clamping head Set-up for ø 65 mm<br />
Our convenient changing fixtures let<br />
you change clamping heads in a flash.<br />
1. Manual changes<br />
The manually actuated EasyGrip MQ<br />
changing fixture is the simplest<br />
change-over method.<br />
EasyGrip MQQ is especially designed<br />
for applications where workspace is<br />
tight.<br />
2. Pneumatic changing unit<br />
The pneumatically actuated PP changing<br />
fixture is absolutely convenient with<br />
its comfortable handle and integrated<br />
valve button.<br />
chuck clamping head changing fixture<br />
The PPG pneumatic changing fixture<br />
has 2 additional handles.<br />
Note: Changing fixtures can be used<br />
for any clamping diameter for the relevant<br />
clamping head size, regardless of<br />
clamping diameter.<br />
MQ<br />
MQQ<br />
PP<br />
PPG<br />
Clamping head change-over<br />
13
MANDO Adapt. Mandrel-in-<strong>SPANNTOP</strong>-chuck<br />
set-up without alignment<br />
draw bolt<br />
Mandrel size<br />
Chuck size<br />
Clamping range<br />
of the mandrel<br />
[mm]<br />
Span [mm]<br />
This mandrel-in-chuck offers convincing performance,<br />
long-lasting power, and unusual speed. It is unsurpassed<br />
by any jaw chuck. In terms of the time savings<br />
offered by the MANDO Adapt, they do not even<br />
come close. A top-class internal clamping fixture.<br />
The advantages<br />
■ change from O.D. clamping to I.D. clamping in<br />
less than 2 minutes – without taking the chuck off<br />
the machine<br />
■ high attainable concentricity without alignment<br />
[< 0.005 mm]<br />
■ five different mandrel sizes – each available for<br />
chuck sizes 42 – 100<br />
0<br />
1<br />
2<br />
3<br />
4<br />
42<br />
52<br />
65<br />
80<br />
100<br />
42<br />
52<br />
65<br />
80<br />
100<br />
42<br />
52<br />
65<br />
80<br />
100<br />
65<br />
80<br />
100<br />
65<br />
80<br />
100<br />
ø 20 - 28<br />
ø 20 - 28<br />
ø 20 - 28<br />
ø 20 - 28<br />
ø 20 - 28<br />
ø 26 - 38<br />
ø 26 - 38<br />
ø 26 - 38<br />
ø 26 - 38<br />
ø 26 - 38<br />
ø 36 - 54<br />
ø 36 - 54<br />
ø 36 - 54<br />
ø 36 - 54<br />
ø 36 - 54<br />
ø 50 - 80<br />
ø 50 - 80<br />
ø 50 - 80<br />
ø 70 - 100<br />
ø 70 - 100<br />
ø 70 - 100<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.25<br />
± 0.35<br />
± 0.35<br />
± 0.35<br />
± 0.40<br />
± 0.40<br />
± 0.40<br />
Fast and easy change-over<br />
Remove clamping head Install MANDO Adapt Mount segment bushing Screw in draw-bolt Mount the end-stop blank<br />
Mount MANDO Adapt on the front side of the <strong>SPANNTOP</strong><br />
chuck and you are ready to go. The mandrel is then adapted<br />
with < 0.005 mm runout. When the draw bolt that is needed<br />
for the actuation of the segmented bushing is screwed on, a<br />
slick mechanism will spread and adapt to the coupling that<br />
normally grabs the clamping head.<br />
14 MANDO Adapt . Mandrel-in-<strong>SPANNTOP</strong>-chuck
Jaw adapter. Jaw-clamping-in-<strong>SPANNTOP</strong>-chuck<br />
block jaws for<br />
machining<br />
hexagon socket wrench<br />
base end-stop<br />
Chuck size<br />
65 80<br />
Now you can also clamp in front of the chuck with<br />
the <strong>SPANNTOP</strong> combi pull-back with axial bolted<br />
base end-stop and the jaw adapter. A combination that<br />
opens completely new possibilities that previously<br />
needed another jaw chuck.<br />
The advantages<br />
■ clamp in front of the chuck – without a second<br />
clamping setup<br />
■ significantly larger clamping diameters can be<br />
realized<br />
■ drilling or milling in-between the jaws<br />
■ chuck jaw with serration, clamping diameter adjustable<br />
by 6 mm<br />
Attainable concentric precision<br />
at 35 kN measured<br />
50 mm from the front edge<br />
of the jaw [in addition to<br />
the concentricity of the<br />
main clamping unit]<br />
Max. permissible jaw<br />
machining depth on the jaws<br />
Max. permissible jaw machining<br />
diameter on the jaws<br />
Swing dia. over bed [mm]<br />
Jaw height [mm]<br />
0.03 mm 0.03 mm<br />
20 mm 20 mm<br />
120 mm 133 mm<br />
146 mm 146 mm<br />
39.5 mm 39.5 mm<br />
Fast and easy change-over<br />
Remove clamping head Install base end-stop Insert jaw adapter Fixed in place via the<br />
central bolt<br />
Jaw ready for machining<br />
A changing fixture is not required when using the jaw adapter.<br />
A central mounting screw pulls the support taper onto the base<br />
end-stop, and in the process spreads the segments in the chuck<br />
coupling. The support taper prevents the jaw adapter from<br />
tipping and thus ensures that it retains its strong clamping<br />
force.<br />
Jaw adapter . Jaw-clamping-in-<strong>SPANNTOP</strong>-chuck<br />
15
| Concept and design: ABSICHT AG www.absicht.ag | Photography: Andy Ridder www.andy-ridder.de |