Sharp RD-1230 Operation Manual page 48

Ⅱ. The speedometer at the time when the pole switch is in low position.
The position for the
Suitable automatic feeding step.
Suitable drilling
diameter mm
Suitable automatic feeding step.
pole
switch.（For TPR-1230,TPR-1230H）
Two speed change lever（low speed）
Speed change levels
Speed（rpm）
Suitable drilling
diameter (mm)
Threading (metric)
Two speed change lever（high speed）
Speed change levels
Speed（rpm）
∅12-∅19
∅22-∅28
threading(metric)
（For TPR-1230,TPR-1230H）
44
∅25-∅40 ∅25-∅40
∅38-∅55 ∅38-∅55
M16-M20
1 2
228
∅10-∅12
∅19-∅22
M3-M6
1 2
5-18
77
∅19-∅25
∅28-∅38
M16-M20
3 1 2 3
398
∅6-∅10
∅10-∅19
Not suggested. Not suggested.
3 1 2 3
141
∅12-∅19
∅22-∅28
M6-M16
1 2 3
750
∅3-∅6
∅3-∅10
1 2 3