When the location surface is not perpendicular to the clamping bore, we recommend the deadlength version. Here the clamping bushing only makes a radial motion, which prevents that the clamping length is shortened. It is typically used on a sub spindle. When the work piece is picked up, the deadlength clamping motion avoids having any pulling effect on the spindles.

Mandrel type 611 - Deadlength Bushing
Mandrel with a clamping bushing that is absolutely fixed in the axial position. Typical applications are: short clamping lengths and blind holes pull-back clamping.

Variation with compensating pendulum effect
For easily deformed parts like bearing rings, we offer clamping bushings with an integrated compensating pendulum effect. That makes it possible to reduce the necessary grinding stock left on the work piece by 50 % or more.

Mandrel type 811 - Deadlength Bushing
Mandrel with a clamping bushing that is in a fixed axial position. Suited for light duty machining and on smaller clamping diameters. It has a minimum clamping diameter of 25 mm. Clamping is achieved by pushing the draw bar.