The ROTA NCR 6-jaw compensation chunk from SCHUNK (Morrisville, NC) allows the clamping of thin-walled and easily-deformed components with diameters up to 1,200mm. The ROTA NCR consists of a central chuck piston, which has three inner pendulums positioned at 120°, which work in conjunction with three pairs of base jaws. With the clamping force points aligned toward the chuck center of rotation, even pre-machined parts can be centered without deformation of the workpiece. The NOTA NCR is available in sizes from 165 to 1,200mm.
Check out www.schunk.com to get more details.