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.
Three Cutting Resistance Forces in Milling
Face Milling Run-out Accuracy
Minor Cutting Edge≤.0012inch
Peripheral Cutting Edge≤.002inch

Improve Finished Surface Roughness
Sub Cutting Edge Run-out and Finished Surface
Mitsubishi Materials' normal minor cutting edge wiper flat width is .055 inch. Usually the minor cutting edges are set parallel to the face of a milling cutter and theoretically the finished surface accuracy should be maintained, even if run-out accuracy is poor.
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 normal insert with wiper insert. ·
  • Wiper inserts are set to protrude by .0012 ― .004 inch from the standard inserts.

How to Set a Wiper Insert
How to Set a Wiper Insert
  • Minor cutting edge length has to be larger than the feed per revolution.
    *But, too long minor cutting edge can also cause chattering.
  • When the cutter diameter is large and feed per revolution is longer than the minor cutting edge of the wiper insert, the use of two or three wiper inserts is possible.
  • When using more than 1 wiper inserts, eliminate run-out of wiper inserts.
  • Use a high hardness grade (high wear resistance) for wiper inserts.