Automotive and bearing-steel cold cutting demands high surface quality. This article presents an "angle-true + inspection" regrind plan for fine-grit precision cold-saw blades (80–110T, rake 0–6°): each blade reused 4–6 times, surface defects cut 60–80%.

An automotive-parts / bearing factory mainly cutting bearing steel (GCr15) and alloy-steel bars on high-speed precision cold saws, where end-face roughness, cracks and heat-affected zones are strictly rejected. Blade diameter 285–360 mm — high-value precision cutting.

• ⚠High surface bar: end-face roughness / micro-cracks mean direct scrap.
• ⚠Heat-sensitive: poor regrind generates heat → surface modification, micro-cracks.
• ⚠Hard to keep angle-true: high-precision blades dull fast; uneven left/right tooth height = out of tolerance.
• ⚠High blade cost: precision blades are pricey; full replacement is expensive.

• ✓Tooth form: fine-grit precision cold-saw blade, TCG (triple-chip grind) rake 0–6°.
• ✓Teeth: 80–110T for surface quality.
• ✓Material: fine-grit carbide, mirror edge, heat-crack resistant.
• ✓Spec: 285/315/360 mm dia, bore per machine, axial runout ≤0.02 mm.

• ✓Each blade reused 4–6 times, regrind cost ≈ 30–45% of new (by condition).
• ✓Surface defects down 60–80%, end-face roughness / micro-crack risk reduced.
• ✓Blade-change downtime down 50%+, steadier precision cycle.