Re: [CAD_CAM_EDM_DRO] lead screw or all thread

In a message dated 16-Nov-01 22:36:49 Central Standard Time,
apollo@... writes:

> If this is what he's referring to:
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> http://www.williamsform.com/Threaded_Rods/Grade_75_All-Thread_Rebar/grade_75_all-thread_rebar.html
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I don't know. This is MY first time to see that site.

>>why would it need to be spun so fast? <<

Because, even 1" dia. allthread has relatively high threads per inch,
compared to
the usual thread-pitches used on CNC machines (usually only 5 TPI).

It does say > something about a "6-10% elongation", so I'm guessing any
hopes for
accuracy > are out the window anyway...<<

Yes. But the elongation is because it is usually used for 'FASTENING', in
which case the nuts are torqued much tighter than with CNC use. Anyway, NOT
the material to use!


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