Page 87 - TURNING CATALOG p635-848

USER GUIDE THREADING

Anvil selection for ABUT threading standard only

The table below defines the recommended insert inclination angle (β) and anvil selection according to helix angle
(φ) for single-start threading and according to lead angle (φL) for multi-start threading, depending on the threading
turning method for machining asymmetric threading profile according to ABUT threading standard only.

Threading turning method

Production of right-hand threading Production of left-hand threading
with right-hand holder with left-hand holder

LH

orRH LH

RH

Anvil selection

Positive Anvils Negative Anvils

Threading helix (lead) angle φ (φL) φ (φL)>3.5° 3°<φ (φL)≤3.5° 2°<φ (φL)≤3° 1°<φ (φL)≤2° 0°<φ (φL)≤1°
Inclination angle β
1.5° (std) 0.5 -0.5° -1.5°
lC Toolholder
Anvil designation

16 EX RH OR IN LH * AE 16 +1.5 AE 16 +0.5 AE 16 -0.5 AE 16 -1.5
(3/8) EX LH OR IN RH * AI16 +1.5 AI16 +0.5 AI 16 -0.5 AI 16 -1.5

22 EX RH OR IN LH * AE 22 +1.5 AE 22 +0.5 AE 22 -0.5 AE 22 -1.5
(1/2) EX LH OR IN RH * AI 22 +1.5 AI 22 +0.5 AI 22 -0.5 AI 22 -1.5

27 EX RH OR IN LH special solution * AE 27 +1.5 AE 27 +0.5 AE 27 -0.5 AE 27 -1.5
(5/8) EX LH OR IN RH * AI 27 +1.5 AI 27 +0.5 AI 27 -0.5 AI 27 -1.5

22U EX RH OR IN LH * AE 22U +1.5 AE 22U +0.5 AE 22U -0.5 AE 22U -1.5
(1/2U) EX LH OR IN RH * AI 22U +1.5 AI 22U +0.5 AI 22U -0.5 AI 22U -1.5

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

* Standard anvil supplied with tool Negative Anvils
• EX - Anvil for external threading
• IN - Anvil for internal threading

Positive Anvils

Feed Towards the Chuck Feed Towards the Tailstock

+φ (φL) +β -φ (φL) −β°

1.5° 1.5°
const. const.

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