Both the "5C" and "16C" feature double acting operation and pull-back design. Each is supplied with a matching collet wrench. "5C" Details The "5C" model is an all steel unit designed for use in pneumatic service to 250 PSI or hydraulic service to 750 PSI. Standard "5C" collets, step chucks and closers for holding parts up to 6 inches in diameter plus expanding collets for I.D. holding can be applied from this unit. Drawtube force is 7.5 times the line pressure applied which maximizes the gripping force available from this compact unit. This model can be easily combined in multiple configurations via the use of connector bushings that eliminate the external plumbing between units. "16C" Details The "16C" model features an A2-5 spindle nose that accepts "16C" collets up to 1- 5/8 inches, "16C" step chucks up to 6 inches in diameter plus expanding nose "16C" collets for I.D. holding of parts. Applied line pressure is multiplied 22.5 times the inlet pressure generating high drawtube forces. Maximum working pressure is 250 PSI in pneumatic service or 400 PSI in hydraulic service. The units are machined from aircraft quality aluminum and feature hardened steel bushings for long lasting trouble free service. Lexair can supply precision machined standard collets, master collets and pads, emergency collets, serrated collets plus uniquely shaped collets by special order.