Technical Information
Stepped Cutting
Stepped cutting is utilized when heavy depth of cut is required. The inserts are set at different diameters. The insert cutting the smaller diameter is given axial lead 1.25 times greater than the feed per revolution over the other insert. Use only insert holders with 0° lead. Stepped cutting allows 1.75 x the depth of cut per tables on page 144. Feed rates must be reduced to .5 x appropriate value.
Rules of Stepped Cutting:
- Use insert holders with 0° lead.
- Set height in inner cutting edge to provide lead 1.25 times greater than the feed per revolution.
- Feed rate as roughing with a single cutter.
- Remove half of the material to be removed with each insert. This should be sufficient for most applications.
