Drilling Glass, 9

Drilling speeds for diamond bits in glass

Diameter 3-4mm
Speed 6000 rpm

Diameter 5-8mm
Speed 4500 rpm

Diameter 9-12mm
Speed 3000 rpm

Diameter 13-16mm
Speed 2500 rpm

Diameter 17-25mm
Speed 2000 rpm

Diameter 26-28mm
Speed 1800 rpm

Diameter 29-44mm
Speed 1500 rpm

Diameter 45-64mm
Speed 1200 rpm

Diameter 65-89mm
Speed 900 rpm

Diameter 90-120mm
Speed 800 rpm

[Based on CR Lawrence and Amazing Glazing recommendations]


For other tips on glass drilling see:


Keeping things wet
Using a drill press
Drilling with a Flushing Head
Avoiding chipping
Drilling holes with copper tube and grit
Drilling tools
Drilling glass without a drill press
Hole Placement
Drilling speeds for diamond bits in glass