Axminster ATDP13B - Drill Speed Material Table

Drill Speed Material Table
22
Spindle MotorJockey Pulley
D
C
B
A
4
3
2
1
12 Speed
Recommended Drill Size per Material
Average Guide
Speed
Wood
Zinc
Diecast
Aluminium
or Brass
Plastic
Cast Iron
and Bronze
Steel
Mild and
Malleable
Steel Cast
and
Carbon
Steel
Stanless and
Tool
50Hz inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm
2450-2500-2580 rpm 5/16” 7.9 3/16 4.8 11/64 4.4 5/32 4.0 7/16 2.8 3/32 2.4 1/16 1.6 1/32 0.8
1580-1750-1870 rpm 3/8 9.5 1/4 6.4 7/32 5.6 3/16 4.8 1/8 3.2 3/32 2.4 1/16 1.6 3/64 1.2
1250-1290-1330 rpm 5/8 15.9 3/8 9.5 11/32 8.7 5/16 7.9 1/4 6.4 5/32 4.0 1/8 3.2 1/16 1.6
790-830-900 rpm 7/8 22.2 1/2 12.7 15/32 11.9 7/16 11.1 11/32 8.7 1/4 6.4 3/16 4.8 1/8 3.2
500-540-600 rpm 1
1
/4 31.8 3/4 19 11/16 17.5 5/8 15.9 1/2 12.7 3/8 9.5 5/16 7.9 1/4 6.4