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Help CenterExternal Gear Slewing Bearing Turntable Bearing for Crane Equipment
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Henan San Kuang Machinery Technology Co., Ltd. is a professional manufacturer specializing in high-performance slewing bearings. Since our establishment in 2022, we have dedicated ourselves to producing reliable External Gear Slewing Bearing Turntable Bearings for crane equipment and industrial rotary applications. With a modern factory spanning 10,000–30,000 square meters and a skilled team of 51–100 employees, we combine advanced machining capabilities with rigorous quality control. Our products are designed to handle heavy loads, provide smooth rotation, and ensure long service life—even in demanding environments. Whether you need a standard model or a custom-designed solution, our bearing offers the precision and durability your crane equipment requires.
This external gear slewing bearing features an integral outer ring with gear teeth, allowing direct power transmission from a pinion. It acts as a turntable bearing that supports both axial and radial loads while enabling 360-degree rotation. Perfect for crane turntables, man lifts, excavators, and other revolving machinery, it delivers consistent performance under heavy dynamic and static loads. Below we outline its key characteristics and benefits.
Key Features & Technical Specifications
- Robust Construction: Made from high-strength alloy steel (50Mn or 42CrMo) through forging or casting, with heat treatment for hardness and wear resistance.
- Integrated External Gear: Gear teeth are directly cut on the outer ring, eliminating additional coupling components and reducing assembly complexity.
- High Load Capacity: Capable of supporting large axial loads, radial loads, and overturning moments—ideal for crane applications.
- Smooth Rotation: Precision-ground raceways and optimized roller or ball arrangement ensure low friction and uniform motion.
- Sealing Protection: Equipped with rubber or metal seals to prevent contamination from dust, moisture, and debris.
- Customizable Dimensions: Outer diameter, inner diameter, gear module, tooth count, and mounting hole patterns can be tailored to your equipment.
- Easy Installation: Pre-drilled mounting holes and clear markings simplify integration into your crane structure.
- Optional Lubrication: Grease nipples and lubrication grooves are available for convenient maintenance.
| Parameter | Typical Range | Remarks |
|---|---|---|
| Outer Diameter (mm) | 500 – 3000 | Customizable |
| Inner Diameter (mm) | 300 – 2000 | Customizable |
| Gear Module | 6 – 20 | External spur gear |
| Rated Load Capacity | 10 – 500 tons (static) | Available upon request |
| Rotational Speed | 0.5 – 10 rpm | Depends on application |
| Operating Temperature | -20°C to +80°C | Extended range optional |
Advantages for Your Crane Equipment
Our external gear slewing bearing offers several benefits that directly improve the performance and reliability of your crane:
- Increased Efficiency: The integrated gear reduces power loss compared to chain or belt drives, delivering more torque to the turntable.
- Space Saving: Compact design eliminates the need for separate large gear rings, saving valuable installation space.
- Enhanced Safety: Robust construction and proven sealing prevent sudden failures, ensuring safe operation even in harsh conditions.
- Lower Maintenance: Factory-filled grease and sealed raceways extend service intervals, reducing downtime.
- Versatile Compatibility: Suitable for crawler cranes, truck cranes, tower cranes, and port machinery.
Trust & Reliability
As a young but rapidly growing manufacturer, Henan San Kuang Machinery Technology Co., Ltd. has already established a strong reputation in the global market. Our annual export value of US$2.5 Million – US$5 Million reflects the trust customers place in us across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and Asia. We ship from major Chinese ports including Shanghai, Lianyungang, Qingdao, and Tianjin, ensuring timely delivery. Every bearing undergoes strict dimensional inspection and load testing before leaving our factory. Our team of 51–100 skilled workers is committed to continuous quality improvement. We offer customized solutions and responsive after-sales support. Contact us today to discuss your specific crane bearing requirements – we are ready to provide a reliable, cost-effective solution.
Frequently Asked Questions (FAQ)
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Q: What is the difference between external gear and internal gear slewing bearings?
A: External gear bearings have gear teeth on the outer ring, driven by a pinion from the outside. Internal gears have teeth on the inner ring and are driven by a pinion from the inside. External gear designs are common for crane turntables where the drive motor is mounted on the structure. -
Q: Can I get a bearing with a specific outer diameter or gear module?
A: Yes, we offer full customization. Please provide your required dimensions, load conditions, and gear parameters. Our engineers will design a bearing to match your equipment. -
Q: How do I determine the right load capacity for my crane?
A: We recommend providing the maximum axial load, radial load, and overturning moment your crane will experience under operation. Our technical team can calculate the appropriate bearing size and rating. -
Q: What materials are used for this bearing?
A: Standard material is hardened alloy steel such as 50Mn (commonly used for medium loads) or 42CrMo (for higher strength and wear resistance). We can also use other grades upon request. -
Q: Are lubrication and sealing provided?
A: Yes, each bearing is pre-packed with lithium-based grease and equipped with rubber or metal seals. Lubrication holes and nipples are available for regreasing. -
Q: What is the typical lead time?
A: For standard sizes, lead time is approximately 30–45 days. Custom orders may require 45–60 days depending on complexity. We will confirm the schedule at order placement. -
Q: Do you provide certificates or test reports?
A: We provide material certificates, dimensional reports, and a load test certificate upon request. For specific third-party inspections, please discuss with our sales team. -
Q: How do you ensure product quality?
A: We follow strict in-process and final inspection procedures, including hardness testing, magnetic particle inspection, gear runout check, and load testing. All records are traceable.
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