Page 42 - Threading_Handbook

THREAD TURNING Anvil Selection for SAGE Threading Standard Only Production of left-hand threading
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 thread turning method for machining asymmetric
threading profile according to SAGE thread standard only.

Thread Turning Method
Production of right-hand threading
with left-hand holder
with right-hand holder

RH or LH LH

RH

Anvil Selection

Positive Anvils Negative Anvils
Threading Helix
(Lead) Angle φ (φL) φ (φL)>5.6° 5°<φ (φL)≤5.6° 3°<φ (φL)≤5° 2°<φ (φL)≤3° 1°<φ (φL)≤2° 0°<φ (φL)≤1°
Inclination Angle β 2.5° 1.5°(std) 0.5° -0.5° -1.5°
lC Toolholder Anvil Designation

16 EX RH OR IN LH AE 16 +2.5 * AE 16 +1.5 AE 16 +0.5 AE 16 -0.5 AE 16 -1.5
(3/8) EX RH OR IN LH AI 16 +2.5 * AI 16 +1.5 AI16 +0.5 AI 16 -0.5 AI 16 -1.5

22 EX RH OR IN LH AE 22 +2.5 * AE 22 +1.5 AE 22 +0.5 AE 22 -0.5 AE 22 -1.5
(1/2) EX RH OR IN LH AI 22 +2.5 * AI 22 +1.5 AI 22 +0.5 AI 22 -0.5 AI 22 -1.5
27 EX RH OR IN LH special AE 27 +2.5 * AE 27 +1.5 AE 27 +0.5 AE 27 -0.5 AE 27 -1.5
(5/8) EX RH OR IN LH solution AI 27 +2.5 * AI 27 +1.5 AI 27 +0.5 AI 27 -0.5 AI 27 -1.5
22U EX RH OR IN LH AE 22U +2.5 * AE 22U +1.5 AE 22U +0.5 AE 22U -0.5 AE 22U -1.5
(1/2U) EX RH OR IN LH AI 22U +2.5 * AI 22U +1.5 AI 22U +0.5 AI 22U -0.5 AI 22U -1.5
27U EX RH OR IN LH AE 27U +2.5 * AE 27U +1.5 AE 27U +0.5 AE 27U -0.5 AE 27U -1.5
(5/8U) EX RH OR IN LH AI 27U +2.5 * AI 27U +1.5 AI 27U +0.5 AI 27U -0.5 AI 27U -1.5
* Standard anvil supplied with tool
• EX - Anvil for external threading
• IN - Anvil for internal threading

Positive Anvils Negative Anvils

Feed Towards the Chuck Feed Towards the Tailstock

+φ (φ L) -φ (φ L)
+β −β°

1.5° 1.5°
const. const.

42 ISCAR