MITSUBISHI MATERIALS CORPORATION
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RADIUS
Radius effects cutting edge strength and finished surface. In general, corner radius 2－3 times the feed is recommended.

Corner Radius and Finished Surface

Corner Radius Size and Tool Life Due to Fracturing

Corner Radius Size and Tool Wear

  • Effects of Corner Radius
  1. Increasing corner radius improves finished surface roughness.
  2. Increasing corner radius improves cutting edge strength.
  3. Increasing corner radius too much increases cutting resistance and causes chattering.
  4. Increasing corner radius decreases flank and rake wear.
  5. Increasing corner radius too much results in poor chip control.
When to Decrease Corner Radius
  • Finishing with small depth of cut.
  • Thin, long workpieces.
  • When the machine has poor rigidity.
When to Increase Corner Radius
  • When cutting edge strength is required such as in interrupted cutting and uncut surface cutting.
  • When roughing a workpiece with large diameter.
  • When the machine has high rigidity.
  • Corner Radius and Chip Control Range
    Corner Radius and Chip Control Range
    (Note.) Please refer to this page for chip shapes (A, B, C, D, E).

  • Cutting Speed and Chip Control Range
    Cutting Speed and Chip Control Range