micrometer

[yesteryearforge]

When I was serving my apprenticeship We had the apprentice lead man ask a question to an apprentice that was not paying attention early on in the program.
He asked the guy
How many thousandths were in an inch.
The apprentice thought for a minute and replied
I dont know but it must be a million of em.


Mike Tanner

[Mende]

Sucker! ..Everyone knows there are a hundred of em!. ...

:P

[MJ Hofbauer]

The smallest reading indicator I have is a millimess comparator which reads in .00002" Strange, I haven't used it yet. Hey, it was free! I plan on using it for calibrating gauge blocks and other gear I have. -MJ

[the_sandy_creek_forge]

Originally Posted by MJ Hofbauer

P.S. there ARE DIY Electron Microscope sites on the web for anyone feeling really ambitious.
Rahmenlayout Schler STM Homepage

Great....you just HAD to tell me.....

-Aaron @ the SCF

[tbrforge]

to MJ,

most times I use a certified gage block to check my mic. not the other way around. The gage blocks are sent off for certification once a year. Hey hey, an ISO 9000 blacksmith!

[MJ Hofbauer]

tbrforge; oh, definately the route to go... sorry I should have elaborated this... I don't want to pay the cost of having all my gage blocks cert'd regularly, so instead I send off one or two (right now I'm having one solid carbide 1/2" from a scherr tumico set done) then calibrate everything off of that... plan to use the millimess for comparative readings to calibrate the other blocks which then are used for the mics/etc in other ranges. And yeah it's overkill, especially since my home isn't fully climate controlled, etc I just like it, and it goes well with my OCPD

-MJ