does anyone know what the machined piece that comes in micrometer sets is called? its used to check the accuracy of the micrometer before you take your measurement. thnxs for responses

 

How about a calibration verifier? I just made that up.

 

It is a Jo Block. Can also be called a gauge block.

RBob.

 

Gauge block...

http://www.mcmaster.com/#gauge-blocks/=kx23wx

 

Gauge block.

 

thnxs for the responses, i finally know i what its called.

 

We old folks used to call that a "standard" but I think your instrument supplier will be good with whatever you call it.

 

Definitions of a Jo Block:

https://en.wikipedia.org/wiki/Gauge_block
http://encyclopedia2.thefreedictiona...ohansson+block

RBob.

 

"Standard" is what we always called the slug that comes with the micrometer set, too.

"Gauge block" was reserved for a units from a set of stackable blocks. Anything that defies gravity is fully deserving of having its own name.

 

That is the way I learned as well.