Page 540 - ISCAR(TURNING-CATALOG-42-2022)
P. 540

USER GUIDE
          PARTING
      PARTING  Parting and Grooving





              Selection of Inserts
              For a proper match of insert and cutting
                                                                A self-clamped tool is recommended for deep radial
                                                                machining. A screw-clamp holder is recommended
              material to application, the following variables   Insert Support
              must be taken into consideration:                 for axial and small D.O.C. machining.
            •  Width of cut (width of insert)
            •  Chipformer style                                 90˚ Mounting
            •  Lead angle                                       It is very important that the insert is mounted at 90º
            •  Corner radius                                    to the center line of the workpiece in order to obtain
            •  Carbide grade                                    perpendicular surfaces and reduce the risk of vibration.

              Width of Cut (W.O.C.) and Depth of Cut (D.O.C.)   Workpiece Machinability
              In selecting W.O.C., the main factor to consider is the   The workpiece material affects all of the above factors.
              required D.O.C. The ratio D.O.C.≈ 8xW.O.C. is of practical
              use on alloy steel of average machinability. For example,   Machine Power and Setup Rigidity
              applying a 3 mm W.O.C. insert TAG N3C to cut-off a    Excessive W.O.C. on a light-duty machine will yield
              48 mm solid bar.                                  vibration and may even stop spindle rotation.
              Additional factors which affect D.O.C.
              capacity, relative to the ratio, are:             Expensive Workpiece Material

              Holder or Blade Size                              On costly metals the narrowest applicable
              To minimize risk of vibration and deflection always choose:  W.O.C. should be used.
            •  Blade or toolholder with smallest possible overhang.
            •  Toolholder with maximum shank dimension.
            •  Blade height (B) dimension which is larger than Tmax.
            •  Blade or holder with maximum blade width (largest
              possible insert seat size).
              Example:
            •  A W.O.C. 9.5 mm on blade TGFH 53K-9
            •  (B=52.6 mm) extends the ratio of D.O.C. to
              W.O.C. by some 50% to 120 mm.
                                                                        30  40
                                                                        20  50
                                                                       10  60
                                                                        0  70
                                                                        90  80
                                                                         0.1/1000
                                        Tmax                              90° ± 10'








































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