MITSUBISHI MATERIALS CORPORATION
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FUNCTION OF TOOL FEATURES FOR FACE MILLING

FINISHED SURFACE
Cutting Edge Run-out Accuracy
Cutting Edge Run-out and Accuracy in Face Milling
Cutting edge run-out accuracy of indexable inserts on the cutter body greatly affects the surface fi nish and tool life.

Improve Finished Surface Roughness
Sub Cutting Edge Run-out
Sub Cutting Edge Run-out
and Finished Surface
Since Mitsubishi Materials' normal sub cutting edge width is 1.4mm, and the sub cutting edges are set parallel to the face of a milling cutter, theoretically the fi nished surface accuracy should be maintained even if run-out accuracy is low.
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  • Replace one or two normal inserts with wiper inserts.
  • Wiper inserts are set to protrude by 0.03-0.1mm from the standard inserts.

How to Set a Wiper Insert
One Corner Type Two Corner Type Two Corner Type
(a) One Corner Type
Replace normal insert.		 (b) Two Corner Type
Replace normal insert.		 (c) Two Corner Type
Use supporter for wiper insert.
  • Sub cutting edge length has to be longer than the feed per revolution.
    *A sub cutting edge that is too long causes chatter.
  • When the cutter diameter is large and feed per revolution is longer than the sub cutting edge of the wiper insert, use two or three wiper inserts.
  • When using more than 1 wiper insert, run-out needs to be eliminated.
  • Use a high hardness grade (high wear resistance) for wiper inserts.