China HRC55 Carbide Mill Suppliers & Factories

Standard 45 HRC mills typically utilize 0.8 µm coarse grain WC with generic TiN or TiCN coating, which break down rapidly above 450°C. Genuine HRC55 tooling requires ultra-fine 0.5–0.6 µm WC grains, 10–12% optimized cobalt binder, micro-honed cutting edges (5–8 µm hone), and high-aluminum AlTiN/TiSiN coatings capable of withstanding oxidation up to 1100°C under severe mechanical shear.

For hardened steel like SKD11 or D2 (52–55 HRC), maintain dry milling with cold air blast. Target cutting speed (Vc) between 80–140 m/min, with feed per tooth (fz) calculated at 0.03–0.08 mm/z depending on diameter. Axial depth (ap) should be kept shallow (10–15% Dc) when profile slotting, or increased up to 1.5x Dc under high-speed trochoidal strategies with light radial engagement (ae 5–8% Dc).

Yes. Over 45% of our monthly 1,000,000 piece volume is produced for overseas tool brands. We provide custom shank marking (laser etching), bespoke flute lengths, customized corner radius configurations, Weldon flats, step geometries, and customer-branded blister packaging with an MOQ of just 1 piece for standard blanks and low minimums for tailored tools.

We control the full upstream process starting with raw APT tungsten conversion and wet ball milling. Each production lot undergoes Sinter-HIP densification, followed by ultrasonic non-destructive flaw detection, automated laser micrometry (h5/h6 tolerance control), and 100% optical inspection on Zoller Genius measuring machines before packaging.