Page 723 - ISCAR(TURNING-CATALOG-42-2022)
P. 723

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


                                                            or                                          LH
                                                     RH
                      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
             •  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.









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