FELT WHEEL SPEEDS – RECOMMENDED SAFE MAXIMUM R.P.M.s
	(For face width shown)
	DIAM.	SOFT DENSITY		MEDIUM DENSITY		HARD OR ROCK HARD
		Under 2"	2" or Over	Under 2"	2" or Over	Under 2"	2" or Over
	6"	3800	3200	4300	3800	4800	4300
	8"	2800	2400	3200	2800	3600	3200
	10"	2300	1900	2550	2300	2800	2550
	12"	1900	1600	2150	1900	2400	2150
	14"	1650	1400	1875	1650	2100	1875
	16"	1450	1200	1625	1450	1800	1625
	18"	1250	1100	1425	1250	1600	1425
	20"	1150	1000	1300	1150	1450	1300