With the elimination of the drawtube Lexair claims its full-bore, fixed length, self-contained collet chuck allows full capacity spindle operation. The company says, spindle capacity is increased by up to 30%, and clamping pressure is unaffected by centrifugal force, regardless of RPM.
The chuck uses air to release the work, rather than secure it, and spring force holds the workpiece while it is being machined. The full-bore chuck is available in seven models with body diameters from 6 to 14 inches, and bar capacity from 2 to 5.5 inches. It also features direct spindle mounting for A5, A6, A8 and A11 tooling.