14-07-2021, 08:54 PM
Nails can be filed to a very exact length , used to gauge the bore, and transferred to external mike. Reduces cumulative errors. Despite the seeming accuracy of any readout, verniers do not match a good micrometer.
Bores are measured at botom where unworn. Max wear is usually at or just below top ring and takes soem hunting. Bores are quite tricky to measure with simple gauges. Have to sweep in little arcs seeking the minimum at the maximum diameter!
Bores are measured at botom where unworn. Max wear is usually at or just below top ring and takes soem hunting. Bores are quite tricky to measure with simple gauges. Have to sweep in little arcs seeking the minimum at the maximum diameter!