Каталог Iscar токарный инструмент 2017 - страница 545

Mini-Tool Features

øD M8; 5/16”-UN; 1/16”-NPT

(1)

4H÷8H/1B÷3B

(2)

A 0.00

(3)

A

Flank Clearance and Effective Inclination Angle

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

α =α

λ l r

β

(1) Smallest possible thread (2) All tolerances (3) Minimum runout (4) High surface quality

Incorrect

α <α

λ l r

β=0

α α

α R α R

L L α - Flank clearance angle l - Helix angle b - Effective inclination angle is achieved by

selecting the suitable anvil

Infeed Methods for Threading Operations

Flank Infeed Radial Infeed Alternating Flanks Infeed

1 2 3 4

5

Flank Equal Flank Diminishing Equal depth of cut for each pass Diminished depth of cut for each pass D1/2 D2/2 D1/2

D1 D2 D3 D n D 1 D 2 D3 D n D n+1