manufactures high quality 5c air collet chucks, 2j air collet chucks,
16c air collet chucks and 3j air collet chucks as well as many other
sizes. Our lathe chuck can be used in both rotary and stationary
applications, and will mount to any American Standard or Camlock style
spindles with the use of a Dunham spindle mounting adapter.
Dunham Tool chucks, with a precision collet closer and collet
actuator, are commonly used as a lathe chuck, as well as with
cylindrical or surface grinders, rotary tables, machining centers and
other equipment. Dunham will provide the spindle adapter to accommodate
your workholding specification. This air lathe chuck is designed for
absolute concentricity adjustability.
Dunham air collet chucks are designed for secondary chucking, not for
through work, and accept all 5c collets and Dunham expanding internal
collets for I.D holding from 1/4" to 6" diameters. Models are also
available for 2j, 3j and 16c collets.
Adjustable concentricity screws permit adjusting to 0.0005" TIR.
Internal stops eliminate length changes due to drawback. Foot or hand
valves free hands for efficient part handling. A special air union
permits spindle speeds to 3,500 rpm. Heat is not generated in the air
collet chucks due to the external mounting of an air union.
Collet sticking is eliminated by a spring-loaded piston. Shop air
pressure activates a large piston, closing the collet. The piston is
spring-loaded and returns when air pressure is exhausted.