Grit Table / oilstones / Crystolon oilstones
Product, no maker data
Silicon-carbide oilstone (Norton)
Norton publishes no micron for Crystolon, the same as India. CAMI-conversion estimates from the grade labels, as ranges.
Each grade below shows its size in microns, its spread (the published distribution, where a maker or standard gives one; most makers publish none), and where that size lands on the reference scale, a shared yardstick for reading grit numbers across makers.
Range 141 to 192 µm. Grade ~ CAMI 80-120 by attested grit label; micron from CAMI conversion (CAMI 80 = 192, 100 = 141 µm).
Range 78 to 116 µm. Grade ~ CAMI 120-180; micron from CAMI conversion (120 = 116, 180 = 78 µm).
Range 36 to 53.5 µm. Grade ~ CAMI 240-320; micron from CAMI conversion (240 = 53.5, 320 = 36 µm).