Quote:
Originally Posted by Brian Carlton
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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AAA gauge blocks are accurate to high tolerance (± 0.00005 mm or 0.000002 in) and used to establish standards.
my mistake, as these are lapped.
anyways; my point still stands. Bosch isn't some magical company. They use the same equipment found in many other shops.