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Flank Clearance and Effective Inclination Angle

Inclination angle β of the cutting edges corresponds to a specific thread helix angle λ and ensures equal clearance angle on both sides of insert.


α - Flank clearance angle
λ - Helix angle
β- Effective inclination angle is achieved by selecting the suitable anvil

Infeed Methods for Threading Operations

Flank Infeed

Radial Infeed

Alternating Flanks Infeed

Flank Equal - Equal depth of cut for each pass


Flank Diminishing - Diminished depth of cut for each pass


Modified Flank Infeed


H - Depth of thread profile (on ø)
D - Depth of pass (on ø)
U - Depth of finishing pass (on ø)