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Help CenterPrecision Hardened Steel Slewing Bearing With 360° Rotation for Heavy Machinery
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Henan San Kuang Machinery Technology Co., Ltd., established in 2014, brings over a decade of precision engineering expertise to our hardened steel slewing bearings. Operating from our 10,000-30,000 sqm facility in Luoyang, China, we've exported $2.5M-$5M worth of industrial components annually to global markets including North America and Europe. Our ISO-certified manufacturing processes ensure each 360° rotation bearing delivers uncompromising performance for heavy machinery applications where reliability is non-negotiable.
Core Technical Advantages:
- Premium Material Construction: Forged from hardened chromium steel (HRC 58-62) through vacuum degassing, enhancing fatigue resistance by 40% compared to standard bearings
- Precision-Ground Raceways: Computer-controlled grinding achieves surface roughness ≤Ra 0.4μm for vibration-free operation at 2 RPM maximum speed
- Advanced Heat Treatment: Induction hardening followed by tempering creates uniform case depth of 4-6mm, maintaining dimensional stability under 250°C operational temps
- Integrated Sealing Solutions: Triple-labyrinth seals with optional NBR coating provide IP65 protection against abrasive contaminants
- Modular Design: Pre-drilled mounting holes with 8.8 grade bolts accommodate flange or pedestal installations
Performance Specifications:
| Parameter | Standard Range | Custom Options |
|---|---|---|
| Bore Diameter | 500-2000mm | Up to 5000mm |
| Axial Load Capacity | 150-3000 kN | On-demand engineering |
| Radial Stiffness | ≥500 N/μm | Precision-matched |
| Operating Temperature | -30°C to +120°C | Special alloys available |
These bearings integrate directly into excavator swing systems, crane jibs, and tunnel boring equipment, reducing component count by 30% while increasing service intervals to 10,000 operating hours. The through-hardened gear teeth (module 8-20) maintain positional accuracy within 0.1 milliradians even under maximum moment loads.
Operational Benefits:
- Maintenance Reduction: Centralized lubrication ports extend relubrication cycles to 500 hours
- Vibration Control: Finite element-optimized stiffness reduces structural harmonics by 15dB
- Corrosion Resistance: Zinc-nickel plating option for marine and chemical environments
- Installation Flexibility: 4-point contact design accommodates combined axial/radial loading
Trusted Global Delivery:
Backed by ISO 9001, ISO 14000, and OHSAS18001 certifications, our 51-100 person engineering team provides full traceability from raw material to finished bearing. With shipments processed through Shanghai, Qingdao, and Tianjin ports, we deliver to 14 global markets with 30-day standard lead times. Each bearing undergoes 72-hour accelerated life testing at 150% rated load before shipment. Contact our technical support team to discuss how our rotation solutions can enhance your machinery's operational lifespan and reduce downtime costs.
Frequently Asked Questions:
Q1: What maintenance is required for these bearings?
A1: Our pre-lubricated design requires only quarterly re-greasing through standard zerk fittings under normal conditions.
Q2: Can you match existing OEM dimensions?
A2: Yes, provide drawings or samples for reverse engineering - 95% of requests are accommodated.
Q3: What's the lead time for custom sizes?
A3: Standard sizes ship in 30 days; custom diameters require 45-60 days for precision machining.
Q4: Do you provide installation guidance?
A4: Comprehensive mounting manuals with torque specifications accompany every shipment.
Q5: How are bearings protected during shipping?
A5: VCI-coated steel crates with desiccant packs prevent corrosion during ocean transit.
Q6: What's your quality control process?
A6: Each unit undergoes coordinate measuring, ultrasonic flaw detection, and load simulation testing.
Q7: Can I get samples before bulk orders?
A7: Sample bearings are available for performance validation with MOQ requirements.
Q8: What payment terms do you offer?
A8: We accept T/T, L/C, and flexible terms for established clients.
Send Inquiry to This Supplier
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