PhilMc
Member
Took my Harbor Freight digital calipers to work to check them against our calibrated standards. All our mic's and standards are traceable to NIST and meet all the requirments for the nuclear industry.
Started out by checking them at each of the inch sizes all the way up to 6". Then pulled some random gauge blocks up to 1".
All the readings were less than .001 from the gauge blocks. For what these things cost ( less than $10 ) I did not expect them to be that accurate. They will never replace high end calipers but are usefull around the loading bench.
I do have Brown & Sharpe mic's up to 3" at home that I use to spot check the ammo I make, just wanted to run the Harbor Freight up against the calibrated stuff at work to set my mind at ease.
Started out by checking them at each of the inch sizes all the way up to 6". Then pulled some random gauge blocks up to 1".
All the readings were less than .001 from the gauge blocks. For what these things cost ( less than $10 ) I did not expect them to be that accurate. They will never replace high end calipers but are usefull around the loading bench.
I do have Brown & Sharpe mic's up to 3" at home that I use to spot check the ammo I make, just wanted to run the Harbor Freight up against the calibrated stuff at work to set my mind at ease.
Last edited: