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LeifCarrotsontoday at 6:54 PM2 repliesview on HN

It's 0.0015, that's 1.5 to 2.5 thousandths, or 15-25 "tenths" as they're called.

That's not a particularly tiny gap in the machinist world, it's large so that you can pump viscous oil in it and deal with a wide variety of temperature changes.

25 thousandths would be sloppy, a nominal clearance hole for a 1/4x20 bolt is about that much.


Replies

cageytoday at 8:00 PM

> 25 thousandths would be sloppy, a nominal clearance hole for a 1/4x20 bolt is about that much.

Isn't that 0.250 which would be 250 thousandths?

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arlattimoretoday at 7:08 PM

Good catch, sorry should have corrected that. While not small for a machinist, I think by the average persons definition that is a pretty small gap for the oil to occupy ;-)