Page 80 - TURNING CATALOG p635-848

THREADING USER GUIDE

Anvil Selection According to Thread Helix Angle λ

Standard

Thread Helix Angle λ >4º 3º-4º 2º-3º 1º-2º 0º-1º Negative Anvils
4.5º
Inclination Angle β 3.5º 2.5º 1.5º 0.5º -0.5º -1.5º
AE16+4.5
l (d) Toolholder AI16+4.5 Anvil Designation
AE22+4.5
16 EX RH OR IN LH AI22+4.5 AE16+3.5 AE16+2.5 AE16 AE16+0.5 AE16-0.5 AE16-1.5
AE27+4.5 AI16-0.5 AI16-1.5
(3/8) EX LH OR IN RH AI27+4.5 AI16+3.5 AI16+2.5 AI16 AI16+0.5 AE22-0.5 AE22-1.5
AE22U+4.5 AI22-0.5 AI22-1.5
22 EX RH OR IN LH AI22U+4.5 AE22+3.5 AE22+2.5 AE22 AE22+0.5 AE27-0.5 AE27-1.5
AE27U+4.5 AI27-0.5 AI27-1.5
(1/2) EX LH OR IN RH AI27U+4.5 AI22+3.5 AI22+2.5 AI22 AI22+0.5 AE22U-0.5 AE22U-1.5
AI22U-0.5 AI22U-1.5
27 EX RH OR IN LH AE27+3.5 AE27+2.5 AE27 AE27+0.5 AE27U-0.5 AE27U-1.5
AI27U-0.5 AI27U-1.5
(5/8) EX LH OR IN RH AI27+3.5 AI27+2.5 AI27 AI27+0.5

22U EX RH OR IN LH AE22U+3.5 AE22U+2.5 AE22U AE22U+0.5

(1/2U) EX LH OR IN RH AI22U+3.5 AI22U+2.5 AI22U AI22U+0.5

27U EX RH OR IN LH AE27U+3.5 AE27U+2.5 AE27U AE27U+0.5

(5/8U) EX LH OR IN RH AI27U+3.5 AI27U+2.5 AI27U AI27U+0.5

+λ° −λ° −β°
+β°

1.5° 1.5°
const. const.
Anvils for positive inclination angle applicable when turning Anvils for negative inclination used when turning RH
RH thread with RH holders or LH thread with LH toolholders. thread with LH holder or LH thread with RH toolholder.

714 ISCAR