Drilling Speeds for Diamond Bit

Drilling Speeds for Diamond Bit
Diameter		Speed	Based on CR Lawrence and Amazing Glazing recommendations
Metric	Imperial
3--4mm 5--8mm 9--12mm 13--16mm 17--25mm 26--28mm 29--44mm 45--64mm 65--89mm 90--1220mm	1/8" -- 3/16" 7/32"-- 5/16" 3/8" -- 1/2" 1/2" -- 9/16" 5/8" -- 1" 1" -- 1-1/8" 1-3/16" -- 1-3/4" 1- 3/4" -- 2-1/2" 2-1/2" -- 3-1/2" 3-1/2" -- 4"	6000 rpm 4500 rpm 3000 rpm 2500 rpm 2000 rpm 1800 rpm 1500 rpm 1200 rpm 900 rpm 800 rpm
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