Page 639 - Iscar
P. 639

USER GUIDE


            Technical Information -
            Notes for Guide Bushing Installation

                Many of the problems in BTA drilling are caused by
                incorrect use of the guide bushing. The shape, type and
                tolerance greatly affect cutting accuracy and tool life.
                Please note the following when using one in                                                          DEEP HOLE DRILLING
                your application.

                Resin Seal Type                                Guide Bushing Tolerance

                          Resin Seal


                  C0.3 0.5
                     ˜
                 Up to 1 mm                                                     DG6 Dh6
                 Up to 1.5 mm



                 Workpiece      Guide Bushing  Oil Pressure Head
                                                                    Tool Diameter    G6
                                                                    D (mm)           Tolerance (mm)
                                                                        8.00 - 10.00    +0.005 ~ +0.014
                Taper Cone Type                                         10.01 - 18.00   +0.006 ~ +0.017
                                                                        18.01 - 30.00   +0.007 ~ +0.020
                                                                        30.01 - 50.00   +0.009 ~ +0.025
                   C0.3 0.5                                             50.01 - 80.00   +0.010~ +0.029
                      ˜
                                                                        80.01 - 120.00  +0.012 ~ +0.034
                  Up to 2 mm
                                                                       120.01 - 180.00  +0.014 ~ +0.039
                                                                       180.01 - 245.99  +0.015 ~ +0.044
                  Workpiece
                        Gap      Guide Bushing  Oil Pressure Head


                Flat-edge Type


                                                                                         30 60°
                                                                                           ˜
                                                                             0.5 1.0 mm
                                                                                ˜


                                                                                   C0.3 0.5  Guide Bushing
                                                                                      ˜

                  Workpiece       Guide Bushing  Oil Pressure Head
                                Recommended for Ø65 mm and less





















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