Sharp RD-1230 - Spindle Speed Change

5-17
5.11 Change the spindle speed.
Warning：
Spindle temperature will go up making operation in trouble when the
spindle speed is set at high rotation mode without movement of the
quill. So please do not set the spindle speed at high rotation mode
when no movement of the quill.
5.11.1（For TPR-1230,TPR-1230H）
Ⅰ. The speedometer at the time when the pole switch is in high position.
（For TPR-1230,TPR-1230H）
The position for the pole switch.（For TPR-1230,TPR-1230H）
Two speed change lever（low speed）
Speed change levels
Speed（rpm） 88 154 282
Mild steel
∅25-∅40 ∅19-∅25 ∅12-∅19
Suitable drilling
diameter (mm)
Cast iron
∅38-∅55 ∅28-∅38 ∅22-∅28
Threading (metric) M16-M20 M6-M16 M3-M6
Suitable automatic feeding step. 1 2 3 1 2 3 1 2 3
Two speed change lever（high speed）
Speed change levels
Speed（rpm）
456 796 1500
Mild steel
∅10-∅12 ∅6-∅10 ∅3-∅6
Suitable drilling
diameter mm
Cast iron
∅19-∅22 ∅10-∅19 ∅3-∅10
threading(metric) Not suggested. Not suggested. Not suggested.
Suitable automatic feeding step. 1 2 3 1 2 3 1 2 3