OUR MISSION: To facilitate communication among glass artists, to encourage education and promote excellence in the glass arts.
 
 
 
 
 

                                          

 

Drilling Speeds for Diamond Bits

                Diameter
Speed
 
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

Based on CR Lawrence and Amazing Glazing recommendations

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