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CAMCOMPCO
 
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Default Cheap drill bits vs good once

Hi Dave,

Not following ya here. I have purchased precision Brown and Sharp
1-2-3 blocks, they all read, 1-2-3 to the 1.000 with the last +/-
0.0005 stuck on zero. I have found that the secret to using calipers
is to wiggle them into the product you are measuring while you apply a
bit of pressure (light) on it, take the smallest reading you get, and
that is the diameter. Now, i am not a machinist, won't be for 20 more
years I imagine, so no argument intended here, just don't follow ya.
Wouldn't I expect to get variance from 1.000 on any of the "Chinese"
calipers if they weren't as accurate as they are stated to be? Not
talking tenths here, just the stated "round to the nearest 0.0005".

My initial statements were more geared towards a comparison of dollars
spent for unit of quality...very high for Chinese cutting tools
compared to the same Chinese parallels, squares, calipers etc...

Thoughts? Love to get more edumacated :-)

John