Originally Posted by
harvey_s
The best idea irrespective of price is to get yourself a reference sample (a slip gauge or reasonably sized bearing roller) sized with a decent micrometer and then just periodically check your calipers calibration.
An expensive set of uncalibrated calipers is just as unreliable as a cheap set...
I been using the same cheapo ones from Aldi and Lidl at work and home and they are fine...
My Aldi caliper worked OK for a while, but after a few months started reading low and required frequent rezeroing. The Moore & Wright badged one I have now is considerably better, and I've grown pretty confident in it to its half-thou resolution, which is good enough for nearly everything I do.
I use bits of ground silver steel for calibration - these are normally accurate and round to less than a tenth of a thou.
Regards,
MikB
...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)