Tolerance of Shop Grade Plus Size Pins?

R

Ryan Wilde

#11
Bob_M said:
Althought people have assumed Class ZZ (which at the moment is Greek to me), but looking at the set, they look very generic, no brand name, no serial number, just a wooden box and numbered + pins...
I have no idea what quality other than
"shop grade +" they really are...
They are most definitely Class ZZ in that case. The only other tolerance of Plus Pin "Library Sets" that I know of is Class X, which would be very highly polished and cost about 5 times more.

I've attached (hopefully) a pdf that I made up quite a few years ago that shows the tolerance of attribute gages used in the U.S. that should help a bit.


Ryan
 

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B

Bob_M

#12
Ryan Wilde said:
They are most definitely Class ZZ in that case. The only other tolerance of Plus Pin "Library Sets" that I know of is Class X, which would be very highly polished and cost about 5 times more.

I've attached (hopefully) a pdf that I made up quite a few years ago that shows the tolerance of attribute gages used in the U.S. that should help a bit.

Ryan
Thanks for the file. :agree:
---------------
Actually some of the +.00040 pins, I cleaned repeatedly and checked repeatedly and still got the same reading... And so did the last QA (last year). So we probably do have some technically our of spec pins... :confused:

At the moment its not a major concern... ;)
 
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