glossary
Secondary Bevel — Glossary Entry
Definition of secondary bevel in industrial cutting: a smaller angled face behind the primary bevel, used to add strength without sacrificing hone.
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Secondary Bevel is a smaller angled face behind the primary bevel, used to add edge strength without sacrificing the hone radius. The secondary bevel is typically ground at a smaller clearance angle than the primary, providing a thicker cross-section at the edge.
When to use a secondary bevel
- Thin slitter blades (< 2 mm) on abrasive substrates: secondary bevel of 0.05–0.10 mm at 12° adds strength
- Shear blades on hard plate: secondary chamfer of 0.05 mm at 8° improves chip resistance
- Granulator rotor knives: secondary chamfer of 0.10–0.20 mm at 10° provides edge support
Trade-off
A secondary bevel reduces the effective clearance angle at the edge, which can increase drag and burr. Specify the secondary bevel only when the primary bevel alone is chipping, not for routine slitter blades.
See also.
