Каталог Iscar державки и пластины для нарезания резьбы 2022 - страница 85

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Anvil selection for symmetric threading profiles

The table below defines the recommended insert inclination angle (β) and anvil selection according to the helix angle (φ) for single-start threading and the lead angle (φL) for multi-start threading, depending on the threading turning method for machining the following symmetric threading profiles:

  • partial profile threading with an angle profile of 60°, 55° only
  • full profile threading according to ISO, UN, Whitworth, NPT, BSPT, Trapeze, ACME, RD standards only

Thread turning method Production of right-hand threading Production of left-hand threading with right-hand holder with left-hand holder

RH RH

or

LH

LH

Thdi hli ldAnvil selectionPositive Anvils0º
rang ex (ea) angleφ(φL)φ(φL)≥ 5º4º≤φ(φL)3º2º1º(φL)≤1º
Inclination Angleβ4.5º3.5º2.5º1.5º(std)0.5º
ICToolholderAnvil Designation
16EX RH OR IN LHAE 16+4.5AE 16+3.5AE 16+2.5AE 16+1.5AE 16+0.5
(3/8)EX RH OR IN LHAI 16+4.5AI 16-3.5AI 16+2.5AI 16+1.5AI 16+0.5
22EX RH OR IN LHAE 22+4.5AE 22+3.5AE 22+2.5AE 22+1.5AE 22+0.5
(1/2)EX RH OR IN LHAI 22+4.5AI 22+3.5AI 22+2.5AI 22+1.5AI 22+0.5
27EX RH OR IN LHil ltiAE 27-4.5AE 27+3.5AE 27+2.5AE 27+1.5AE 27+0.5
(5/8)EX RH OR IN LHspeca souonAI 27+4.5AI 27+3.5AI 27+2.5AI 27+1.5AI 27+0.5
22UEX RH OR IN LHAE 22U+4.5AE 22U+3.5AE 22U+2.5AE 22U+1.5AE 22U+0.5
(1/2U)EX RH OR IN LHAI 22U+4.5AI 22U+3.5AI 22U+2.5AI 22U+1.5AI 22U+0.5
27UEX RH OR IN LHAE 27U+4.5AE 27U+3.5AE 27U+2.5AE 27U+1.5AE 27U+0.5
(5/8U)EX RH OR IN LHAI 27U+4.5AI 27U+3.5AI 27U+2.5AI 27U+1.5AI 27U+0.5

* Standard anvil supplied with tool Positive Anvils

Feed Towards the Chuck

+φ (φ )

L

+β

1.5°

const.