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 and Accuracy in Face Milling
Cutting edge run-out accuracy of indexable inserts on the cutter body greatly affects the surface finish and tool life.
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Face Milling Run-out Accuracy
Minor Cutting Edge≤0.03mm
Peripheral Cutting Edge≤0.05mm

Improve Finished Surface Roughness
Sub Cutting Edge Run-out and Finished Surface
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 finished surface accuracy should be maintained even if run-out accuracy is low.
Actual Problems
Cutting edge run-out. · Minor cutting edge inclination. · Cutter body accuracy. · Spare parts accuracy. · Welding, vibrati
Countermeasure
Wiper Insert
Machine a surfacethat has already been machined by normal insert in order to produce smooth finished surface.
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  • Replace one or two normal inserts with wiper inserts.
  • Wiper inserts should be set to protrude by 0.03─0.1mm from the standard inserts.

How to Set a Wiper Insert
How to Set a Wiper Insert
  • Sub cutting edge length has to be longer than the feed per revolution.
    *Too long sub cutting edge causes chattering.
  • 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 inserts, eliminate run-out of wiper inserts.
  • Use a high hardness grade (high wear resistance) for wiper inserts.

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