Общий каталог Mitsubishi 2020 - 2021 - страница 442

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BORING BARS PRECAUTION IN USING THE MICRO-MINI TWIN PRECAUTIONS IN USING THE MICRO-MINI TWIN aWhen using a holder for general purpose/small automatic lathe aTo avoid chipping of the 2nd cutting edge take care when inserting the boring bar into the holder. Refer Fig.1 to fig.1 if the 2nd edge contacts the internal face of the holder there is a possibility that it may chip. Internal face of the holder Cutting edge Insert direction sWhen clamping the boring bar into the holder, there is a possibility that damage to the shank and the Fig.2 3rd clamping screw 2nd cutting edge can occur. Make sure that the clamping screws are tightened to the set torque value. Additionally make sure that there is no clamping screw near the 2nd cutting edge as this can break the boring bar. eWhen using Mitsubishi holders with a tool overhang of 5 lxd, ensure that the 3rd clamping screw is removed prior to machining. (For RBH1620N, RBH19020N there are no 3rd clamping screws). Insert point 2nd cutting edge The set torque value for clamping screw is 18 lbf-in. (2.0 N • m) aWhen using a square type holder aWhen installing the boring bar into the holder, tighten the clamping screw making the micro-mini Fig.3 twin boring bars in contact with the reference plane of square type holder. E sMake sure that the clamp screw is tightened. The recommended set torque value is shown in the table of holder. Insert The reference planeof square type holder dDon't tighten the clamp screw without a micro-mini twin boring bar, otherwise the clamp bridge can Tighten the clamping screw ensuring making the micro-mini twin be deformed. boring bars in contact with the reference plane of square type holder. E039