cnc collet chucks
Lathe Chuck
Features and Benefits

Dunham Tool 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. This Dunham air collet chuck is designed for use in both rotary and stationary applications, and will mount to any American Standard, Camlock, Flat Face style spindles or Rotary Tables 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.

  • Requires only 1 air line, either through the spindle to the center chuck Rear Housing air port, or to the side air port
  • Standard shop air operates air collet chucks
  • Power factor: 15 times the pressure, i.e. at 100 psi line pressure exerts a pull force of more than 1,500 lbs. on collet air chuck
  • Simple face plate mounting or special spindle mounts to suit customer requirements
  • Built-in concentricity flange permits adjusting concentricity to new standards of collet accuracy improving TIR of all collets
  • Collet gripping power can be uniformly controlled by regulating air pressure
  • Lightweight - air collet chucks weighs approximately 9 lbs. No frictional heat is generated by lathe chuck

Visit our online catalog to view the complete Dunham Tool line of machine tool products.

Specifications and Dimensions for Air Collet Chucks

Chuck Style "A" Dia. "B" Dim. "C" Dim.
2.18 THD
cnc collet chucks
Product Drawings for Air Collet Chucks
Choose either the GIF format to open in your browser or .dxf format which is in a self-extracting zip file. After downloading the file to a directory of your choice double click the .exe file and the .dxf files will be available for viewing in your CAD program. Refer to text file for the index of drawing listings.
  • Dunham 'No Thru Hole' Air Collet Chuck Kit Mounted to Lathe or Grinder Spindles and CNC Rotary Tables
    gif format

  • Dunham Air Collet Chucks: 5C, 16C, 3J, 2J, 3C gif format

    All CAD files for this product DXF format
Model Number and Description Air Collet Chucks
Air Collet Chucks
Part Number Part Description
ACC5C4T 5C Air Collet Chucks with 4 degree tapered nose
5C Air Collet Chucks with 2 3/16" threaded nose
ACC2J 2J Air Collet Chucks
ACC3J 3J Air Collet Chucks
ACC16C 16C Air Collet Chucks
Air Collet Chucks Accessories
CC1301 Thru hole for non-rotating applications only (for all sizes)
ACC-3HV-KIT 3-Way hand valve air regulator gage and one hose 36" long
ACC-3FV-KIT 3-Way foot valve air regulator gage and one hose 72" long
ACCAU Rotating union
CENTER PLUG Centering plug
ACC WRENCH Collet wrench
Spindle Mounting Adapters quoted on request.

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