Tips

Conversion table for grit sizes of diamond tools

by Julian van der Hidde on Feb 01, 2026

The following table serves as a guide for converting between the different grit sizes of diamond tools.

All information is provided without guarantee.

Diamond FEPA narrow	Diamond FEPA broad	CBN FEPA narrow	CBN FEPA broad	US Mesh	Grit	Mesh size µm	Mesh in µm
D301		B301		50/60	60	300 – 250	250 – 300
D251 / D213	D252	B251 / B213	B252	60/80	80	250 – 212 / 212 – 180	180 – 250
D181		B181		80/100	90	180 – 150	150 – 180
D151		B151		100/120	100	150 – 125	125 – 150
D126		B126		120/140	120	125 – 106	106 – 125
D107		B107		140/170	150	106 – 90	90 – 106
D91		B91		170/200	180	90 – 75	75 – 90
D76		B76		200/230	220	75 – 63	63 – 75
D64		B64		230/270	240	63 – 53	53 – 63
D54		B54		270/325	280	53 – 45	45 – 53
D46		B46		325/400	360	45 – 38	38 – 45
D35				400/500	450	40 – 32	32 – 45
D30				450/550	500	32 – 25	25 – 32
D25				600	600	30 – 20	20 – 30
D20				800	800	25 – 15	15 – 25
D15				1200	1200	20 – 10	10 – 20
D10				1500	1500	15 – 8	8 – 15
D7				2400	2400	12 – 6	6 – 12
D5				3000	3000	8 – 4	4 – 8
D3				6000	6000	4 – 2	2 – 4
D1				8000	8000	2 – 1	≤ 3
					14.000		0 – 2
					100.000		0 – 0,25