Page 189 - Threading_Handbook

3.8 Thread Milling Methods

There are several methods used for thread milling operations. The cutter usually rotates
clockwise, except in special cases where the tool rotates counterclockwise. The spiral
movement of the cutter can be clockwise or counterclockwise, and the tool can produce a
thread by top-down or bottom-up. The combination of these movements depends on the THREAD MILLING
type of thread required to produce; left-hand or right-hand threads.

Internal External
Right-Hand Threading Left-Hand Threading Right-Hand Threading Left-Hand Threading
Climb Milling Climb Milling

Conventional Milling Conventional Milling

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