FUNCTION OF TOOL FEATURES FOR TURNING

HONING AND LAND

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

 

Effects of Honing

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

When to Decrease Honing Size

When finishing with small depth of cut and small feed. Soft workpieces. When the workpiece and the machine have poor rigidity.

When to Increase Honing Size

Hard workpieces. When cutting edge strength is required for uncut surfaces and interrupted cutting. When the machine has high rigidity.

 

*Cemented carbide, UTi, coated diamond and indexable cermet inserts have round honing as standard already.