Каталог Iscar державки и пластины для нарезания резьбы 2022 - страница 87

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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.

Production of right-ha with right-handT nd threading holderhreading RHturning m orethod Produ LHction of left with left-ha-hand thre nd holderading LH
RHAnvilselection PositiveAnvilsNegative Anvils
Threadinghelix (lead) angleφ(φL)φ(φL)>3.5°3°L)≤3.5°2°1°φL)≤2°0°
Inclination angleβ1.5° (std)0.5-0.5°-1.5°
lCToolholderAnvil designation
16 (3/8)EX RH OR IN LH EX LH OR IN RHAE 16 AI16+1.5 +1.5AE 16 +0.5 AI16 +0.5AE 16 AI 16-0.5 -0.5AE 16 -1.5 AI 16 -1.5
22 (1/2)EX RH OR IN LH EX LH OR IN RHAE 22 AI 22+1.5 +1.5AE 22 +0.5 AI 22 +0.5AE 22 AI 22-0.5 -0.5AE 22 -1.5 AI 22 -1.5
27 (5/8)EX RH OR IN LH EX LH OR IN RHspecial solutionAE 27 AI 27+1.5 +1.5AE 27 +0.5 AI 27 +0.5AE 27 AI 27-0.5 -0.5AE 27 -1.5 AI 27 -1.5
22U (1/2U)EX RH OR IN LH EX LH OR IN RHAE 22 AI 22UU +1.5 +1.5AE 22U +0.5 AI 22U +0.5AE 22 AI 22UU -0.5 -0.5AE 22U -1.5 AI 22U -1.5
27UEX RH OR IN LHAE 27U +1.5AE 27U +0.5AE 27U -0.5AE 27U -1.5
(5/8U)EX LH OR IN RHAI 27U+1.5AI 27U +0.5AI 27-0.5AI 27U -1.5
Standard an • EX - Anvil f • IN - Anvil fovil supplied with tool or external threading r internal threading Positive Anv Feed Towardsils the ChuckN Feed Towegative An ards thvils e Tailstock
+φ(φL)-φ(φL)−β°
+β
1.5°1.5°
const.const.