JW Winco

Our customers in the USA are managed by JW Winco. Please, use the website of JW Winco: jwwinco.com

GN 411.2 Centering Bore Clamps


GN 411.2 Centering Bore Clamps, Steel Type: K - with clamping balls
Type: K - with clamping balls
GN 411.2 Centering Bore Clamps, Steel Type: K - with clamping balls GN 411.2 Centering Bore Clamps, Steel Type: S - with clamping segments

Product description


With centering 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) with type K
  • Distortion free clamping
  • Reduced height
  • Can be fitted in any position
  • Large adjustable range
  • Draw-down clamping



  • Hardened
  • Blackened

Clamping balls / segments

  • Hardened
  • Plain, tumbled


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 drawing

Hide technical drawing
GN 411.2 Centering Bore Clamps, Steel sketch

Article options / Table


Kwith clamping balls
Swith clamping segments
Show / Hide columns
w1w2Number of
in kN
11,7*14,210M 44,31,53,52,53,53,98,66,340,71,330,5
14,518,512M 44,325,53,54,59,814,2561,22,333,5
18,522,515M 55,32,57,535,511,516,56,271,22,334
22,526,520M 66,4364714,119,6981,22,334,5
26,530,520M 66,4364,5714,119,8981,22,334,5
30,538,525M 66,4474,5914,123,2982,34,634,5
38,546,530M 88,447,54,5111827,212102,34,666,5
46,554,530M 88,447,54,5111827,112102,34,666,5
54,570,545M 1010,5595,51523,740,614124,79,268
70,586,560M 12135105,51728,346,117154,79,2610
86,5102,560M 16175105,52530,351,221154,79,2612,5
* This size is only available as type K.

Build & Price

Open 3D configurator
Diameter d1


Sketch GN 411.2 dimensions

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 centering clamp and bore of the workpiece.

Type K (with balls) is used for clamping applications where minor 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.

Sketch Operating principle GN 411.2

Selected Part (How to order)

Total (net)
plus VAT 43,53 €
gross 272,62 €
In stock
Weight: 0,012 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 50,00 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

CAD data

Other data formats


For getting CAD data please enter you Email address. But we would be pleased, if you are fully registered.

Please enter the code you can find in the picture.

CAD Download Tutorial About CAD-Downloads
Save as favourite

Please enter the code you can find in the picture.

Do you find your product ?

Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM: +49 7723 6507 - 0

To the customised elements | To the contact persons

Your contact

You are looking for a Ganter partner near you? Please select the country.


Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM:

Request Callback
An error has occurred!
We have received your callback request and will contact you soon.