Key Applications
• Automotive: Hub bearings, transmission gears, CV joints
• Wind Energy: Pitch/yaw bearing raceways, turbine shafts
• Heavy Machinery: Excavator slewing rings, mining crusher rollers
• Rail Transport: Axle boxes, wheel set bearings
• Precision Instruments: High-speed spindle bearings (ABEC 7/9)
Technical Specifications
Property Details
Material Grade SAE 52100 / SUJ2 / GCr15 / DIN 100Cr6
Hardness HRC 61-65 (Through-hardened)
Surface Finish Ra ≤0.025μm (Superfinishing optional)
Diameter Tolerance ±0.0005mm (Grade 3) to ±0.01mm
Microstructure Fine martensitic with dispersed carbides
Certifications IATF 16949, ISO 9001:2015, DNV-GL
Competitive Advantages
✅ Ultra-Clean Steel: Vacuum induction melting (VIM) reduces inclusions (≤DS 1.5)
✅ Heat Treatment Expertise: Deep cryogenic treatment (-196°C) for dimensional stability
✅ Custom Geometry: Flats, grooves, or through-holes for specialized assemblies
✅ Anti-Corrosion Options: Zn-Ni coating, black oxide, or DLC (Diamond-Like Carbon)
✅ Global Compliance: REACH/RoHS certified, conflict-free mineral sourcing
Quality Assurance Protocol
Material Purity
OES spectrometers for chemical composition analysis
Inclusion rating per ASTM E45 (Method A)
Dimensional Control
3D optical profilometry for roundness/cylindricity
Automated sorting by diameter (resolution 0.1μm)
Durability Testing
L10 life testing under simulated load conditions
Micro-pitting resistance per FVA 54/I test
Packaging Solutions
Anti-Rust Protection: VCI film + nitrogen-filled aluminum foil bags
High-Precision Parts: Individually nested in ESD-safe trays
Bulk Shipments: Steel drums with desiccant and impact sensors
