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Help CenterCustom Bore Size Slewing Ring With Preloaded Ball Bearings
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Henan San Kuang Machinery Technology Co., Ltd., established in 2014, is a trusted manufacturer specializing in high-precision slewing rings. Our Custom Bore Size Slewing Ring with Preloaded Ball Bearings is engineered to deliver exceptional rotational accuracy and rigidity for demanding applications. With a factory spanning 10,000-30,000 square meters and a dedicated team of 51-100 employees, we combine advanced machining capabilities with rigorous quality control to produce components that meet the highest industry standards. This product is ideal for customers who require tailored bore dimensions without compromising on bearing performance.
Our slewing rings are designed to handle combined loads—axial, radial, and moment—with minimal clearance. The preloaded ball bearing configuration ensures zero backlash, making it suitable for precision positioning systems in robotics, medical equipment, and aerospace. Each ring is manufactured from high-strength alloy steel (e.g., 42CrMo or 50Mn) and undergoes heat treatment for enhanced durability. The bore size can be customized to fit your specific shaft or housing requirements, offering flexibility for unique design constraints.
Key Features and Technical Specifications:
- Custom Bore Size: Available in any diameter from 50 mm to 6000 mm, with tolerances as tight as IT6.
- Preloaded Ball Bearings: Reduces vibration and improves rotational stiffness by up to 30% compared to standard slewing rings.
- Material Options: 42CrMo (for high strength) or 50Mn (for wear resistance), with optional surface hardening.
- Sealing: Rubber seals (NBR or FKM) or metal shields to protect against contaminants.
- Lubrication: Pre-filled with lithium-based grease; oil lubrication available for high-speed applications.
- Load Capacity: Supports axial loads up to 500 kN and moment loads up to 100 kNm (depending on size).
| Parameter | Value |
| Bore Diameter Range | 50 mm - 6000 mm |
| Outer Diameter Range | 100 mm - 7000 mm |
| Preload Type | Light, Medium, Heavy (adjustable) |
| Operating Temperature | -40°C to +120°C |
| Raceway Hardness | HRC 58-62 |
| Accuracy Grade | P5, P4, P2 (ISO 492) |
Benefits for Your Application:
- Enhanced Precision: Preloaded balls eliminate play, ensuring repeatable positioning in CNC turntables and indexing tables.
- Reduced Maintenance: Sealed design and high-quality grease extend service life beyond 10,000 hours under normal conditions.
- Space-Saving Design: Integrated mounting holes simplify installation, reducing overall system footprint.
- Customization Flexibility: Bore size, preload level, and sealing options can be tailored to your exact requirements.
At Henan San Kuang Machinery Technology Co., Ltd., we have exported over US$2.5 million worth of slewing rings annually to markets across North America, Europe, and Asia. Our products are certified under multiple quality management systems, including ISO9001, ISO14000, and OHSAS18001, ensuring consistent reliability. With shipping ports in Shanghai, Lianyungang, Qingdao, and Tianjin, we offer efficient logistics to global customers. Our experienced engineering team provides technical support from design to delivery, making us your preferred partner for custom slewing ring solutions. Contact us today to discuss your bore size requirements and experience the difference in quality and service.
Frequently Asked Questions (FAQ)
Q1: What is the minimum order quantity for custom bore size slewing rings?
A: Our minimum order quantity is typically 1 piece for custom sizes, but we recommend confirming with our sales team for specific requirements.
Q2: How long does it take to manufacture a custom bore size slewing ring?
A: Lead time depends on complexity and size, but standard custom orders take 15-30 working days after design approval.
Q3: Can the preload level be adjusted after installation?
A: No, the preload is set during manufacturing. However, we offer different preload options (light, medium, heavy) to suit your application.
Q4: What materials are available for the slewing ring?
A: Common materials include 42CrMo and 50Mn steel. Other alloys can be used upon request for special environments.
Q5: Do you provide technical drawings for custom designs?
A: Yes, we provide 2D and 3D CAD drawings for customer approval before production.
Q6: What is the maximum load capacity for your preloaded ball bearing slewing rings?
A: Load capacity varies with size; for example, a 500 mm bore ring can handle axial loads up to 200 kN. Please consult our engineers for exact values.
Q7: Are these slewing rings suitable for outdoor use?
A: Yes, with proper sealing and corrosion-resistant coatings (e.g., zinc plating or paint), they are suitable for outdoor environments.
Q8: How do I ensure the correct bore size for my application?
A: Provide your shaft or housing dimensions, and our team will recommend the optimal bore size and tolerance class.
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