Micrometer Calibration Methods

J
#11
Our wire tolerance is +.060"/- .003". Unbelievable for reinforcement of concrete but it is engineered to withstand so much pressure and weight. If the wire is too big it can upset the engineered material if it is to be put together with other pieces of structure.

The thing is, if you go to the high side, you are giving away wire. The closer to the negative side the more money you make. We make and sell millions of tons of wire.
Ah - I see your point. Still one might have to ask how much "cost" is involved in keeping to the low end of the tolerance vs "giving away" a bit more wire...Definitely a cost analysis thing...

However, given your current situation and tolerances, it is obvious why you use micrometers. Now it is just a matter of taking a good look at the various pieces of information provided here and developing a sufficiently robust calibration procedure adequate to your needs.

Peace
James
 
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P

palmer

#12
We have been in business for over 30 years and deal with various state DOT's including the one who questioned our methodology in testing. We maintain our test records FOREVER. This is in case something happens like the bridge collapse in Minnesota a couple years ago. Find the responsible party to blame. We have never had a fault where there was a structural failure of our product.

This is the 1st time that has ever been questioned. There are other states that are so much more critical that Texas when we send samples and test results. I think this is someone new who is either got some lean mfg experience or is throwing his weight around.

:topic: I've been removed from the Continuous Improvement role that I had in the past. Our new owner does not want that position at each facility. I now have purchasing as my responsibility and safety coordinator under previous and new owner. As purchaser, I had to get someone to calibrate the scales, my past experience kept them from paying someone to calibrate 10 or 20 micrometers. I still want to be in lean and continuous improvement. Too bad no one will notice what I did to save them some bucks and help them with recording their calibrations.:nopity::notme:
 
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