Collet Chucks bolt directly to lathe spindle nose.
Press Release Summary:

Original Press Release:
Lexair Direct Mount Collet Chucks Are An Economical Way To Increase Productivity
LEXINGTON. KY (December 14, 2001) - Lexair's direct mount collet chucks bolt directly to the lathe spindle nose and can be used on any spindle that incorporates a draw tube type actuator. They feature a simple pull back design and are especially suited for clamping small diameter workpieces. Their compact size increases tool clearances and reduces strain on spindle bearings. The 3600 rigid clamping feature allows increased machine speeds for bar feed applications.
Lexair's direct mount collet chucks are available in types 5C, 16C, 3J, 20C and 25C. A threaded nose is available on 5C chucks to provide step chuck capability.
Lexair is a manufacturer and marketer of heavy duty, precision hydrodynamic bar feed systems; magazine style short bar loaders; fixed length, direct mount and wrench operated collet chucks; collet workholding systems and CNC bar pullers.