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BACK TURNING TOOLHOLDERS [TKFB INSERT]

 Chip Control Improvement During Back Turning

                                  Chip control improvement by tool pass changes                              Chip control improvement by tool pass changes                GRADES                   A
                                                                                                                                                                                                     B
                      Roughing                                                                   Pre-stage Machining is Processed with Solid End Mill                                              C
                     (1) GMM2420-020MW (Grooving)                                                (1) 2FESW040-040-04 (Solid End Mill)                                                                D

      Roughing /                                                                                                                                                            INSERTS
Pre-Stage Machining

                                                                                                                                                                            CBN & PCD

                     (1) When Using TKFB12R28010M (Back Turning / Righ-hand)                     (1) When Using TKFB12R28010M (Back Turning / Righ-hand)                    TOOLHOLDERS SMALL TOOLS

       Finishing                                                                                 Advantages : 1. Minimal deflection during long machining passes            BORING                   E
(Countermeasure 1)                                                                                                  2. Chips are broken into small pieces, though the                                F
                                                                                                                       workpiece material is elastic.                       GROOVING                 G
  Use Right-Hand                                                                                                                                                                                     H
      Toolholder                                                                                 Disadvantages : The pre-stage machining may cause fractures,                                        J
                                                                                                                       because of interruption                                                       N
                               Advantages : Smooth Surface Finish                                                                                                                                    P
                               Disadvantages : If machining pass is long, the guide bushing can  (2) When Using TKFB12L28010M (Back Turning / Left-hand)                                             R
                                                                                                                                                                                                     T
                                                      not support the workiece

                               (2) When Using TKFB12L28010M (Back Turning / Left-hand)

                                                                                                                                                                            CUT-OFF

      Finishing                                                                                                                                                             THREADING
(Countermeasure 2)
                     Advantages : 1. Smooth Surface Finish                                       Advantages : 1. Minimal deflection during long machining passes            HSK TOOLING SPARE PARTS
  Use Left-Hand
     Toolholder                         2. High precision cutting if the machined portion does                      2. Chips are broken into small pieces, though the
                                           not contact the guide bushing                                               workpiece material is elastic

                     Disadvantages : If machining pass is long, the guide bushing can                               3. High precision cutting if the machined portion does
                                           not support the workiece                                                    not contact the guide bushing

                                                                                                 Disadvantages : The pre-stage machining may cause fractures,
                                                                                                                       because of interruption

 Peeled Surface Countermeasures During Face Back Turning                                                                                                                   TECHNICAL

      When peeled surface occurs on the workpiece face, please apply the countermeasures below.

 C ountermeasure 1 (Face Finishing)   C ountermeasure 2 (Face Finishing After Grooving)

                     External Turning                                             External                                                                                  INDEX

                                                                                 

                     Plunging
                             Face Finishing
                                                                                                                     Machining by
                                                                                                                         grooving toolholder

                                                                                                                                Face finishing

                                       kyocera@kyocera-tools.ru                                                                                                             E15
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