
according to the reduction rate. And, in case of slotting, recommend to be used under 4D overhung length.
| L/D | n(min-1) Spindle spee | Vf(mm/min) d Feed speed | Note | L/D | n(min-1) Spindle speed | Vf(mm/min) Feed speed | ap |
| ~4D | 0% | 0% | - | ~4D | 0% | 0% | Up to 0.15D |
| 5~6D | 25% reductio | 30% n reduction | - | 5~6D | Not recommended. | ||
| 7~8D | 40% reductio | 50% n reduction | In case of tool dia. ø22 or more, not recommended. | 7~8D | Not recommended. |