Re: [CAD_CAM_EDM_DRO] Hardening rails

In a message dated 11/22/2003 12:35:07 PM Central Standard Time,
johnatl@... writes:
Maybe I could put it in the oven at 500deg?
JJ:

MANY "in here" have already answered your question several times in more than
one way, but here's ANOTHER answer from an old [deleted] who has used LOTSA
Thomson stuff: Their "Class L" is case-hardened to RC-60 (that's like a new
file), and PRECISION centerless-ground to some precision measured in "tenths".
It is STRAIGHT within, what, 0.001" per foot, or something like that. There
is NO WAY without oversize rod, straightening-equipment, and
centerless-grinding equipment that you will APPROACH the required precision for proper function
with linear ball-bearings. Just bite the bullet and PAY those OUTRAGEOUS
prices Thomson charges, and be DONE with it!

I have found that paying for the GOOD stuff will COST you less in the end, if
you hope or expect a piece to last until the following Monday!

Jan Rowland


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