Page 192 - Threading_Handbook

THREAD MILLING Tangential Entering by Line 4 External Threading 1 DC
This method is very simple, with all the advantages of the tangential entering by arc method,
but is used only for external threading.

2
3

DW

DW - Workpiece diameter
DC - Cutter Diameter
1-2: Tangential line entry
2-3: Helical movement during one full orbit (360°)
3-4: Tangential line exit

192 ISCAR