Grinding bar between a driving regulating wheel and a grinding wheel without holding it in centres, producing the roundest and most accurate bright bar available.
Loss of carbon from the surface layer of steel during hot rolling or heat treatment, leaving a soft skin that will not harden with the rest of the bar.
Rotary machining that removes the outer skin of a hot rolled bar in one continuous cut, followed by reeling to straighten and burnish it — the standard route for heavy alloy bar.
The arithmetic average roughness of a surface in micrometres — the number specified when a bar is the finished running surface rather than stock to be machined.
Heating a medium or high carbon steel above its critical temperature and quenching so that hardness is achieved through the full section rather than only at the surface.
The ISO limits that fix how far under nominal a bright bar diameter may sit — h8 being the tightest and h11 the loosest, with the permitted band widening as diameter increases.