by angry_monk, published
If you find that there is too much friction to move the calipers try applying a plastic-safe grease to the gear teeth and gear faces. I used a little Crisco cooking grease for this and it worked very well.
Calipers include inside & outside jaws, depth gauge, adjustable & locking dial, and thumb wheel.
I actually found the precision in measurement to be surprisingly accurate. With a little care you can get correct measurements to within +/-0.0025".
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Excuse me,why my softwares load the STl and it show the caliper's size is 7.43mm x 2.83mm x 0.80mm ?Is it should be use another uint such as inch?
Scaling to 78.74% will make the caliper read 2mm per revolution of the dial, which makes the minor graduations on the dial 0.1mm. The major graduations on the dial, which you are referring to, would be 0.2mm (so you are correct). The minor graduations on the caliper body would then be 2mm and the major graduations would be 20mm.
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