Dunham Collet Chucks - 5C, 16C, 2J, 3J

CNC COLLET CHUCK

Lathe chucks

Features and Benefits

Dunham Tool manufactures a high quality 2j CNC collet chuck, 5c collet chuck, 16c collet chuck and 3j CNC collet chuck as well as many other sizes such as a 1c collet chuck and 3c collet chuck. These precision lathe chucks will mount directly to American Standard (A4, A5, A6, A8) and Camlock (D4, D5, D6, D8) style spindles. The Dunham Tool lathe chucks are also frequently used on cylindrical grinders, rotary tables, and many other machines. Dunham will provide the correct spindle and draw tube adapters to accommodate your spindle and draw tube requirements.

These productivity enhancing CNC collet chuck systems have a built-in concentricity adjustment (under 0.00050” TIR) and can be mounted on all American Standard spindles in less than 20 minutes. Only one complete lathe chuck assembly is required because each spindle adapter of the assembly will accept any Dunham Tool 16c, 2j, 3j and 5c collet adapter. Change-over is accomplished quickly and easily by the removal and replacement of only six bolts on the collet adapter Also available for Camlock style spindles.

Dunham air actuated collet chuck assemblies for converting CNC lathes and grinders to workholding with 16c, 2j, 3j and 5c collets are available.

Available for American Standard, Camlock and special spindle noses
Adapts CNC lathes for standard 16c, 2j, 3j and 5c collets, expanding collets, and 5c step chucks
Each spindle mount accepts 16c, 2j, 3j and 5c collet adapter
Built-in concentricity adjustment (under 0.00050” TIR)
Workholders are actuated by machine closer
Light weight permits higher turning speeds
Balanced design for smooth running
Easy and fast mounting (less than 20 minutes)
Collet unaffected by centrifugal force
Small body diameter reduces tool interference
Consistently lower cost

Specifications and Dimensions for CNC Collet Chuck Systems

Information for fabrication of Drawtube Adapter
Machine model
Spindle A4, A5, A6, A8, Camlock	A
Spindle I.D.	B
O.D. Draw tube	C
I.D. Draw tube	D
Draw tube external thread size	E
Draw tube internal thread size	F
Draw tube fully extended	G
Draw tube fully retracted	H

Model Number and Description CNC Collet Chuck

Part Number	Part Description
DTC-5C-4T-A4	Accepts 5C collets, Hardinge ® tapered nose, fits A-4 spindle. Bar capacity 1 1/16"
DTC-5C-4T-A5	Accepts 5C collets, Hardinge ® tapered nose, fits A-5 spindle. Bar capacity 1 1/16"
DTC-5C-4T-A6	Accepts 5C collets, Hardinge ® tapered nose, fits A-6 spindle. Bar capacity 1 1/16"
DTC-5C-4T-A8	Accepts 5C collets, Hardinge ® tapered nose, fits A-8 spindle. Bar capacity 1 1/16"

DTC-5CTHD-A4	Accepts 5C collets, Hardinge ® threaded nose, fits A-4 spindle. Bar capacity 1 1/16"
DTC-5CTHD-A5	Accepts 5C collets, Hardinge ® threaded nose, fits A-5 spindle. Bar capacity 1 1/16"
DTC-5CTHD-A6	Accepts 5C collets, Hardinge ® threaded nose, fits A-6 spindle. Bar capacity 1 1/16"
DTC-5CTHD-A8	Accepts 5C collets, Hardinge ® threaded nose, fits A-8 spindle. Bar capacity 1 1/16"

DTC-16C-A4	Accepts 16C collets, fits A-4 spindle. Bar capacity 1 5/8"
DTC-16C-A5	Accepts 16C collets, fits A-5 spindle. Bar capacity 1 5/8"
DTC-16C-A6	Accepts 16C collets, fits A-6 spindle. Bar capacity 1 5/8"
DTC-16C-A8	Accepts 16C collets, fits A-8 spindle. Bar capacity 1 5/8"
DTC-16C-D16	Accepts 16C collets, fits D1-6 spindle. Bar capacity 1 5/8"
DTC-16C-D18	Accepts 16C collets, fits D1-8 spindle. Bar capacity 1 5/8"

DTC-2J-A4	Accepts 2J collets, fits A-4 spindle. Bar capacity 1 3/8"
DTC-2J-A5	Accepts 2J collets, fits A-5 spindle. Bar capacity 1 3/8"
DTC-2J-A6	Accepts 2J collets, fits A-6 spindle. Bar capacity 1 3/8”
DTC-2J-A8	Accepts 2J collets, fits A-8 spindle. Bar capacity 1 3/8"
DTC-2J-D16	Accepts 2J collets, fits D1-6 spindle. Bar capacity 1 3/8"
DTC-2J-D18	Accepts 2J collets, fits D1-8 spindle. Bar capacity 1 3/8"

DTC-3J-A4	Accepts 3J collets, fits A-4 spindle. Bar capacity 1 3/4"
DTC-3J-A5	Accepts 3J collets, fits A-5 spindle. Bar capacity 1 3/4"
DTC-3J-A6	Accepts 3J collets, fits A-6 spindle. Bar capacity 1 3/4"
DTC-3J-A8	Accepts 3J collets, fits A-8 spindle. Bar capacity 1 3/4"
DTC-3J-D16	Accepts 3J collets, fits D1-6 spindle. Bar capacity 1 3/4"
DTC-3J-D18	Accepts 3J collets, fits D1-8 spindle. Bar capacity 1 3/4"

DTC-22J-A6	22J Collets, fits A-6 spindle, Bar Capacity 2 1/4"
DTC-22J-A8	22J Collets, fits A-8 spindle, Bar Capacity 2 1/4"
DTC-5C-4T-D14	Accepts 5C collets, Tapered Nose, fits D1-4 spindle. Bar Capacity 1 1/16"
DTC-5C-4T-D15	Accepts 5C collets, Tapered Nose, fits D1-5 spindle. Bar Capacity 1 1/16"
DTC-5C-4T-D16	Accepts 5C collets, Tapered Nose, fits D1-6 spindle. Bar Capacity 1 1/16"
DTC-5C-4T-D18	Accepts 5C collets, Tapered Nose, fits D1-8 spindle. Bar Capacity 1 1/16"
DTC-5CTHD-D14	Accepts 5C collets, Threaded Nose, fits D1-4 spindle. Bar Capacity 1 1/16"
DTC-5CTHD-D15	Accepts 5C collets, Threaded Nose, fits D1-5 spindle. Bar Capacity 1 1/16"
DTC-5CTHD-D16	Accepts 5C collets, Threaded Nose, fits D1-6 spindle. Bar Capacity 1 1/16"
DTC-5CTHD-D18	Accepts 5C collets, Threaded Nose, fits D1-8 spindle. Bar Capacity 1 1/16"
DT-ADPTR	Drawtube adapter - Customer must supply dimension from existing draw tube.
SPECIAL CNC COLLET CHUCKS AVAILABLE. ADDITIONAL INFORMATION AVAILABLE ON REQUEST.