Re: [CAD_CAM_EDM_DRO] Re: Thread milling

In a message dated 12/9/04 10:54:08 PM Eastern Standard Time,
robsheplyman@... writes:

> ////I was taught and its common knowledge within the ranks that there is no
> such thing as a size range on collets. Collets are ground to specific
> diameter. Using them on any other diameter will disfigure them and is referred to
> as "the cardinal sin of collets". Installing a larger or smaller than intended
> diameter in their bore will result in 3 points of contact within the spindle
> and risk triangulating the taper. To hold a tap shank which none of them are
> nominal, simply make an adapter in the lathe with a nominal O.D and setscrew
> to secure. There are some commercially available with collapsible collets
> like tapmatic uses if memory serves me correct.
>
> Ron
>

Ron:

I agree, even in the woodworking industry collets with a size range are very
very scarce and downright scary since you are turning them around 20,000 rpm
or more in some cases.

Randy Abernathy

4626 Old Stilesboro Road NW
Acworth, GA 30101
Ph / Fax: 770-974-5295
E-mail: cnc002@...

I furnish technical support, repair, and other related services for your
industrial woodworking machinery. My background as Senior Service Engineer for the
SCMI Group for nearly fifteen years with factory training, combines with my
extensive background in electronics, mechanics, pneumatics, electrical and CNC
machinery to offer you needed support for your machinery.



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