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Old 03-21-2008, 08:50 AM
Brian Carlton Brian Carlton is offline
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Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by Monomer View Post
I've seen grinders do it.


would an injection pump need that kinda accuracy? not really. getting down to a ten thousandth is easier than you may think...
I don't believe you have seen a grinder achieve .000001". And, if so.........I'd like the address of this grinder. The number is far less than the best possible surface finish that can be achieved with stone and there is no measuring equipment that is easily obtained to verify a size to .000001".

No, the injection pump does not need that accuracy. And getting down to .0001" (which is 100X your quoted figure) is difficult but not impossible.

I've been in this business for 20 years and the difficulties of achieving .0001" on bores is well known to me.
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