Dunham Model 2000 Cartridge Spindle 5C A2-3, Dunham 5C Air Collet Closer and Pulley

Dunham Cartridge Spindle Assemblies are designed and manufactured in 3 'Model' groups, with American Standard Spindle Noses (A2-3, A2-4, A2-5 and A2-6) as well as special Spindle Nose configurations. Dunham Spindles are designed to directly accept 5C, 2J, 16C and 3J Collets and tooling, as well as optional 1C, 3C and other 'Work Holding' Collet sizes. While primarily designed and employed as 'Work Holding Spindles' with full 'thru hole' capacities up to 1 3/4", Dunham Spindles are also designed to directly accept optional 'Tool Holding' Shank sizes such as Morse Tapers #3, 4, 5, CAT 30, 40, etc..

  

All Dunham Spindle surfaces employed as 'fixture or tool mounting surfaces' (for Collet, Jaw Chuck, Tool Shank or special fixtures) including American Standard Tapers, Diameters and faces are guaranteed for 0.000050" TIR accuracy to assure the highest accuracy and repeatability when using Jaw Chucks, Collets, Special Fixture Plates or Tool Holders.

Dunham Model 5000 16C A2-5 Cartridge Spindle

All Dunham Spindle Assemblies are manufactured with rugged, high accuracy angular contact bearings (ABEC 7) which maintain Spindle accuracies of 0.000020" to 0.000050" TIR, and are rated for up to 10,000RPM (operating superbly at low or high RPMs).

  

For very 'high volume' production applications which produce Collet wear, Dunham Spindles can also be equipped with Dunham Collet Chucks with replaceable Dunham 'Collet Noses' which mount directly to the American Standard Spindle Nose. Or they can be equipped with replaceable Dunham 'Collet Adapters' which insert directly into the Dunham Spindle shaft (for example, via a #5 Morse Taper).