I have always wondered... On my larger units, I offer the option of DA
style collet chucks up to 3/4" shank capacity. Funny thing is that
customers usually call me within 6 months to a year to get replacement
collets.

I assume they are spinning tools in the collets and ruining the ID surface
of the collet and thus causing runout... Or maybe tightening the collet
chuck around an empty collet and deforming it? What would cause a collet to
go bad? The same doesn't hold true for the ER style collets on our smaller
units and/or the Key Type chucks... At least not as often.

....Of course, it could simply be that they are losing them, but given their
size, I doubt that is the case.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

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