I am using these things daily, so they would be pretty knackered if I did that. (And I'd loose sooooo many batteries.)Trick is to take the battery out between uses, if not they are constantly measuring as the ‘off’ button apparently only turns the display off. I do this and batteries last ages
I am using these things daily, so they would be pretty knackered if I did that. (And I'd loose sooooo many batteries.)
Verniers take a little getting used to, but always work. Yes they need good eyesight, or having your glasses. But if doing engineering work, reloading etc. you really need to be seeing properly.
Grab a steel drill bit. 8mm, 13mm, 1/2 inch etch then measure the unworn part of the shank the chuck hasnt spun on.
I don't think drill bits are considered a good idea for calibration...the shank of some twist drills are undersize by a few thou presumably for clearance. If you don't want the expense of gauge blocks, a few single ball or roller bearings from simplybearings.co.uk would get you to within a few microns.
For most measurements in simple reloading though it is precision rather than arbitrary accuracy that is more important. As long as each one of your cartridges ends up with the same dimensions as the next, those dimensions do not need to conform to a calibrated dimension standard, they just have to work with your rifle....so as long as you always use the same calliper and it always reads the same dimension on a drill bit it should be fine.
Alan
I understand that, we paid a specialist to calibrate/certificate all equipment in the workshop. My reply was to accuracy of cheaper items. They are alegedly calibrated but it’s still nice to check it on something readily available. Even if an 8mm bit reads 7.98 if it reads that ten or more times times I think most would suss it as fairly repeatable for the money. Just compare a good unit on the same bit if you can borrow one to prove.
One of the biggest advantages is the ease which you can swap between metric and imperial.
just checked they are roebuck 0.02mm 1_1000in
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On sale this week ( I think ).I USE THE DIGITALS FROM ALDI LASTED SO FAR, sorry caps, i do have a roe set that someone gave me stainless but i,m not sure what increments are on it ,
You do know that the shank is undersize right?Grab a steel drill bit. 8mm, 13mm, 1/2 inch etch then measure the unworn part of the shank the chuck hasnt spun on.