help with vernier micrometer

[indestructibleman]

what does this say?



is it 0.1027?
that'd be 2.6086 mm on a shim that says 260, which i guess is reasonable, but i would have expected the shim to be smaller than marked.

[JetSwing]

you might have misplaced a decimal when adding up the mumbers.

i think it's 0.10027 inch = 2.546858 millimeters

double check the numbers.

[Caffeine]

Hell, I still haven't figured out my slide rule.   :dunno:

[GeeP]

0.1027"

How to read:

1)  Scale on the barrel is marked in .025" increments.

2)  Scale on the thimble is marked in .0005" increments.

3)  Vernier adds up to an extra .0005"

Note:  This micrometer has markings every .0005" on the thimble.  This is one way of doing things.  Usually the vernier scale will only go from .0000  to .0005 then.  Most micrometers are marked in .001" increments on the thimble and .0000 - .0010 on the vernier.  You arrive at the same result though.

So...

.1 + .0025 + .0003.

Remember...  .0086mm oversize = .0003" oversize.  Well within the funnypaper I'm sure, and average for surface grinder work.  My guess is that the manufacturing tolerance on the shims is +- 1/2 the thickness of the thinnest available shim.  A higher thickness tolerance would not yield additional gains.  The only purpose for surface grinding them at all is for surface finish.