Page 40 - Threading_Handbook

THREAD TURNING Production of right-hand threading LH or Production of right-hand threading RH
Thread Turning Method

with left-hand holder
with right-hand holder

LH

Anvil Selection RH
Negative Anvils

Threading Helix (Lead) Angle φ (φL) 0º<φ (φL)≤1º 1º<φ (φL)≤2º φ (φL)≥2º
Inclination Angle β -0.5º -1.5º

lC Toolholder Anvil Designation
16 EX RH OR IN LH AE 16-0.5 AE 16-1.5
(3/8) EX RH OR IN LH AI 16-0.5 AI 16-1.5
22 EX RH OR IN LH AE 22-0.5 AE 22-1.5
(1/2) EX RH OR IN LH AI 22-0.5 AI 22-1.5
27 EX RH OR IN LH AE 27-0.5 AE 27-1.5
(5/8) EX RH OR IN LH AI 27-0.5 AI 27-1.5 special solution
22U EX RH OR IN LH AE 22U-0.5 AE22U-1.5
(1/2U) EX RH OR IN LH AI 22U-0.5 AI 22U-1.5

27U EX RH OR IN LH AE 27U-0.5 AE 27U-1.5
(5/8U) EX RH OR IN LH AI 27U-0.5 AI 27U-1.5

• EX - Anvil for external threading
• IN - Anvil for internal threading

Negative Anvils

Feed Towards the Tailstock

-φ (φ L)
−β°

1.5°
const.

40 ISCAR