Threaded Mandrel for Unimat SL Chucks

[Paul Jones]

PJs,
I agree with preferring the ER class of collet with their 1 mm clamping ranges (~0.04") and better holding qualities. However, I think there is a larger selection of new and used fixtures based on the 5C collet, plus the ability to customize the collet (soft jaws), expandable versions to clamp ID, and ones for hex and square rods. I don't think you can have too many different collets but having the common diameters is really all you need. Thank you for the advice.
Regards, Paul