Page 725 - ISCAR(TURNING-CATALOG-42-2022)

USER GUIDE
THREADING

Mini-Tool Features Infeed Methods for Threading Operations
(1) øD M8; 5/16”-UN; 1/16”-NPT Flank Infeed Radial Infeed Alternating
(2) 4H÷8H/1B÷3B Flanks Infeed
(3) A 0.00 1
2
3
4
5

A
Flank Equal

(1) Smallest possible thread Equal depth of cut for each pass
(2) All tolerances
(3) Minimum runout
D1/2
(4) High surface quality
D2/2
Flank Clearance and Effective Inclination Angle H/2 D3/2
Inclination angle β of the cutting edges corresponds Dn/2
to a specific thread helix angle l and ensures an D/2
equal clearance angle on both sides of the insert. U/2
4 αl<αr 8 2 1 = = = 2
αl=αr Incorrect D D D D
n
2
3

2

2
λ λ
Diminished depth of cut for each pass
Flank Diminishing Modified Flank Infeed
β β =0 1-3°
D1/2
D2/2
D3/2
α L α R α L α R Dn/2
Dn+1/2
D/2
α - Flank clearance angle H - Depth of thread profile (on ø) U/2
λ - Helix angle D - Depth of pass (on ø) D D D D D
β - Effective inclination angle U - Depth of finishing pass (on ø) 2 1 > 2 2 > 3 2 > n 2 > n+1
2

is achieved by selecting
the suitable anvil

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