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HONING AND LAND

Honing and land are cutting edge shapes that maintain cutting edge strength.
Honing types are round type and chamfer type. The optimal honing width is approximately 1/2 of the feed.
Land is the narrow rectangular area on the rake or flank face.

• Effects of Honing

1. Enlarging honing increases cutting edge strength, tool life and reduces fracturing.
2. Enlarging honing increases flank wear occurrence and shortens tool life. Honing size doesn't affect rake wear.
3. Enlarging honing increases cutting resistance and chattering.

When to Decrease Honing Size In finishing with small depth of cut and small feed. Soft workpiece. When workpiece and the machine have poor rigidity.

When to Increase Honing Size Hard workpiece. When cutting edge strength is required such as in uncut surface cutting and interrupted cutting. When the machine has high rigidity.

* Cemented carbide, STi, UTi, coated diamond, and indexable cermet insert have round honing (standard) already.