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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)
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