戻る
The cutting conditions when machining SS400 with TPT, PT1/4, a tap for tapered thread machining for pipes, are as follows:
A cutting speed of 3~6m/min is recommended.
The reference diameter of 13.157 mm is calculated as the tool diameter.
For example, if the cutting speed is 4 m/min, which is within the range...
Rotation speed (min-1) = Cutting speed ÷ π ÷ Tool diameter × 1000 (min-1)
Rotation speed is 96.8 (min-1) ≈ 100 (min-1) Approximately 100 revolutions per minute
To calculate the feed rate, the number of mountains in PT1/4-19 is 19, so the pitch is calculated as 1.3368 mm.
If the rotation speed is 100 revolutions per minute, the feed rate (mm/min) = 100 × 1.3368 mm ≈ 134
The feed rate is 134 mm/min.