GN 411.2 Centring bore clamps


  • RoHS

Description

Specification

Types

  • Type K: with clamping balls
  • Type S: with clamping segments
Steel
  • hardened
  • blackened
Clamping balls /-segments
  • hardened
  • blank, ground

Information

With centring bore clamps GN 411.2 workpieces can be centrally positioned and clamped from the inside of the bore.
They offer the following advantages:
- Precise self centering
- Repetitive accuracy: ± 0.025
- Accuracy of concentricity: ± 0.05
- Solid and stable clamping through either 3 or 6 contact points on the workpiece
- Clamping of workpieces with uneven or irregular surface (such as castings)
- Distortion free clamping
- Reduced height
- Can be fitted in any position
- Large adjustable range
- Draw-down clamping

On request

  • Centring bore clamps GN 411.3, operable from the opposite side respectively for hydraulic or pneumatic operation 
  • Centring bore clamps with 2 clamping elements for clamping tubes

Technical information

Technical information

Operating principle

A circular ball cage containing 3 or 6 balls is forced outwards over an accurately guided cone by means of a screw which, through the exerted thrust, will enlarge the outside diameter of the circular ball cage. This in turn will lead to a firm contact between the centring clamp and bore of the workpiece.
Type K (with balls) is used for clamping applications where minute ball marks at the contact points with the workpiece are acceptable. Type S (with clamping segments) is used in such cases where marks at the clamping points on the workpiece would be acceptable.
Centring bore clamps  GN 411.2
GN 411.2
Filter
Description d1 d2 d3 d4 d5 d6 h1 h2 k ±0.1 l1 min. l2 l3 t min. w1 w2 Number of
clamping elements
Clamping force
in kN
Weight
GN 411.2-11,7-K 11.7 14.2 - M 4 4.3 1.5 - 2.5 3.5 3.9 8.6 6.3 - 0.7 1.3 3 0.5 12
GN 411.2-14,5-K 14.5 18.5 12 M 4 4.3 2 5.5 3.5 4.5 9.8 14.2 5 6 1.2 2.3 3 3.5 20
GN 411.2-18,5-K 18.5 22.5 15 M 5 5.3 2.5 7.5 3 5.5 11.5 16.5 6.2 7 1.2 2.3 3 4 39
GN 411.2-22,5-K 22.5 26.5 20 M 6 6.4 3 6 4 7 14.1 19.6 9 8 1.2 2.3 3 4.5 77
GN 411.2-26,5-K 26.5 30.5 20 M 6 6.4 3 6 4.5 7 14.1 19.8 9 8 1.2 2.3 3 4.5 86
GN 411.2-30,5-K 30.5 38.5 25 M 6 6.4 4 7 4.5 9 14.1 23.2 9 8 2.3 4.6 3 4.5 125
GN 411.2-38,5-K 38.5 46.5 30 M 8 8.4 4 7.5 4.5 11 18 27.2 12 10 2.3 4.6 6 6.5 233
GN 411.2-46,5-K 46.5 54.5 30 M 8 8.4 4 7.5 4.5 11 18 27.1 12 10 2.3 4.6 6 6.5 323
GN 411.2-54,5-K 54.5 70.5 45 M 10 10.5 5 9 5.5 15 23.7 40.6 14 12 4.7 9.2 6 8 653
GN 411.2-70,5-K 70.5 86.5 60 M 12 13 5 10 5.5 17 28.3 46.1 17 15 4.7 9.2 6 10 1271
GN 411.2-86,5-K 86.5 102.5 60 M 16 17 5 10 5.5 25 30.3 51.2 21 15 4.7 9.2 6 12.5 1783
GN 411.2-14,5-S 14.5 18.5 12 M 4 4.3 2 5.5 3.5 4.5 9.8 14.2 5 6 1.2 2.3 3 3.5 20
GN 411.2-18,5-S 18.5 22.5 15 M 5 5.3 2.5 7.5 3 5.5 11.5 16.5 6.2 7 1.2 2.3 3 4 39
GN 411.2-22,5-S 22.5 26.5 20 M 6 6.4 3 6 4 7 14.1 19.6 9 8 1.2 2.3 3 4.5 61
GN 411.2-26,5-S 26.5 30.5 20 M 6 6.4 3 6 4.5 7 14.1 19.8 9 8 1.2 2.3 3 4.5 102
GN 411.2-30,5-S 30.5 38.5 25 M 6 6.4 4 7 4.5 9 14.1 23.2 9 8 2.3 4.6 3 4.5 127
GN 411.2-38,5-S 38.5 46.5 30 M 8 8.4 4 7.5 4.5 11 18 27.2 12 10 2.3 4.6 6 6.5 235
GN 411.2-46,5-S 46.5 54.5 30 M 8 8.4 4 7.5 4.5 11 18 27.1 12 10 2.3 4.6 6 6.5 325
GN 411.2-54,5-S 54.5 70.5 45 M 10 10.5 5 9 5.5 15 23.7 40.6 14 12 4.7 9.2 6 8 660
GN 411.2-70,5-S 70.5 86.5 60 M 12 13 5 10 5.5 17 28.3 46.1 17 15 4.7 9.2 6 10 1280
GN 411.2-86,5-S 86.5 102.5 60 M 16 17 5 10 5.5 25 30.3 51.2 21 15 4.7 9.2 6 12.5 1792