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Designation
Centring Clamp
Form
A
Version 1
with ball
Body material
steel
Component material
steel
Body surface finish
hardened and black oxid finish
Component surface finish
hardened and ground
Steel code
1.2842
D2=Ball Ø
4
D=Diameter min.
22,5
D=Max. diameter
26,5
F3=Retaining force max. kN
4,5
M=Tightening torque max. Nm
10
N=No. of balls
3
R=Application
blanks
A
7
Clamping type
internal clamping
D1
M10
D2
20
D3
3
D4
M05
H
25,4
H1
19,8
H2
14,2
H3
13
H4
2,3
L
6
L1
17,4
L2
15
M
3,5
SW
8

Description

Material
Body 1.2842.

Ball and hex segments 1.4112.

Tension spring 1.4310.
Version
Body hardened and black oxidised.
Ball and hex segments hardened and ground.
Note
Form A: With balls for holes where light marking is acceptable.
Technical Data
Repetitive accuracy ±0.025
Concentric accuracy ±0.05
Application
For centre positioning and clamping in blind holes. Operated from below, manual or automatic using pneumatics or hydraulics.
Advantages
- Precise self-centring.
- Distortion free clamping.
- Large spread range.
- Low overall height.
- Positive down force.
Drawing reference
Form A:
With balls for holes where light marking is acceptable.
Form B:
With hexagons for sensitive hole surfaces.

1) Mounting aid:
pin to accurately position the mandrel segments.
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