Grit Table / ceramic / Gatco Ceramic hones
Product, no maker data
Ceramic stone
No particle size in microns is published for this line. The values are our estimates from secondary sources, so the marks are faded and the spread is unknown.
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.
C-estimated from CAMI 80 = 192 micron; Gatco states grit only.
C-estimated from CAMI 120 = 116 micron.
C-estimated from CAMI 220 = 66 micron.
C-estimated from CAMI 400 = 23.6 micron.
C-estimated, ambiguous: ~3 micron by CAMI extrapolation (Gatco uses CAMI numbers), but ~15 micron if read as FEPA-P1200.