Convex Edge Maintenance Challenges
Address common issues with high-polish convex shears used for precision, dry cutting, and slide work.
Convex edge sensitivities
- Ultra-sharp; any debris amplifies drag.
- Hollow grind must remain intact—DIY touch-ups ruin the ride line.
- Harder steels (ATS-314, powder blends) chip easily if tension is loose.
Maintenance best practices
- Clean constantly: Wipe after each client, especially with dry cutting.
- Oil more frequently: Daily at minimum; twice daily during heavy slide work.
- Store separately: Use padded sleeves to protect polished edges.
- Monitor tension: Loose tension causes blade separation and micro-chipping along the edge.
Slide cutting precautions
- Keep tension slightly tighter for heavy slide work to maintain blade engagement.
- Practice gentle pressure—forcing the blade through sections creates flat spots.
- Rotate with a dedicated dry-cut shear if you notice increased resistance.
Sharpening requirements
- Hire sharpeners specializing in Hamaguri (convex) edges.
- Request documentation of ride line preservation.
- Limit the number of sharpenings per year; over-sharpening thins blades prematurely.
Troubleshooting quick hits
- Edge feels dull mid-day: Clean, oil, tighten tension. If issue persists, chips may be present.
- Chipping: Review technique, check for contact with clips/combs, and schedule professional inspection.
- Glide lost after sharpening: Sharpening angle likely changed—send back with feedback and request re-polish.