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Help CenterPrecision Cross Roller Slewing Bearing, 300mm Inner Diameter, 2.5 KNm Moment Capacity, IP65 Double Lip Seal, for Robotics
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As a leading manufacturer from Henan San Kuang Machinery Technology Co., Ltd. (established in 2014, with a 10,000–30,000 m² factory and ISO9001-certified processes), we are proud to present our Precision Cross Roller Slewing Bearing – 300 mm inner diameter, 2.5 kNm moment capacity, IP65 double lip seal. This bearing is specifically engineered for high-precision robotics and automation applications where compact design, rigidity, and environmental resistance are critical. With over 8 years of export experience to markets including North America, Europe, and Southeast Asia, our products are trusted by global OEMs for their consistent performance.
Our cross roller slew bearing combines a single-piece raceway design with alternating cylindrical rollers arranged at 90° angles, delivering exceptional axial, radial, and moment load capacities in a compact footprint. The IP65 double lip seal effectively protects against dust, water jets, and debris, making it suitable for harsh industrial environments including welding, material handling, and collaborative robots.
Below we detail the key specifications, advantages, and benefits that make this bearing the ideal choice for your robotic joints, turntables, and rotary indexing systems.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Inner Diameter (ID) | 300 mm |
| Outer Diameter (OD) | Customizable (typically 380–450 mm) |
| Moment Capacity (static) | 2.5 kNm |
| Axial / Radial Load Capacity | High (depends on mounting & raceway design) |
| Roller Type | Crossed cylindrical rollers |
| Seal Type | Double lip seal (IP65) |
| Mounting Holes | Available on both inner and outer rings |
| Precision Grade | P5 / P4 (optional, up to P2) |
| Operating Temperature | -20°C to +80°C (standard) |
Product Features & Advantages
- High Rigidity & Accuracy: The cross roller arrangement eliminates clearance and provides high rotational stiffness, essential for precise positioning in robotic arms and gantries.
- Compact & Lightweight: Compared to traditional ball bearings or gear-driven solutions, this slewing ring offers a low-profile design that saves space and reduces overall system weight.
- IP65 Protection: The double lip seal prevents ingress of dust, moisture, and oil mist, ensuring reliable operation even in dirty or washdown environments.
- Smooth Rotation: Precision-ground raceways and matched rollers deliver low friction and excellent running smoothness, minimizing vibration and noise.
- Easy Integration: Pre-drilled mounting holes and optional gear teeth (internal or external) allow direct connection to motors or actuators.
- Customizable Options: We offer variations in outer diameter, seal material (e.g., FKM for high temperature), and mounting hole patterns to match your specific robotic joint design.
- Long Service Life: Made from high-quality bearing steel (e.g., GCr15) with heat treatment, the bearing withstands high loads and repeated cycles without premature wear.
Benefits for Robotics Applications
When used in robotic systems, this bearing delivers:
- Improved repeatability and end-effector accuracy due to zero backlash characteristics.
- Reduced maintenance downtime thanks to the effective sealing and long-life grease lubrication.
- Higher payload capacity in a smaller envelope, enabling more compact robot designs.
- Compatibility with both collaborative (cobot) and industrial robot arms requiring pitch/roll/yaw motions.
- Stable performance under shock loads and moment fluctuations common in pick-and-place or assembly operations.
Trust & Quality Assurance
At Henan San Kuang Machinery Technology Co., Ltd., we have been manufacturing precision slewing bearings since 2014. Our factory spans over 10,000 m², staffed by 51–100 skilled workers, and we maintain ISO9001, ISO14000, and other quality management systems. Our annual export value of US$2.5–5 million reflects our commitment to international standards. Each bearing undergoes rigorous dimensional verification, seal integrity testing, and load testing before shipment. We ship from four major ports (Shanghai, Qingdao, Lianyungang, Tianjin) to customers worldwide, including North America, Europe, and Asia.
We understand that robotics applications demand reliability — our cross roller slewing bearing has been adopted by automation integrators and robot manufacturers for its consistent performance over thousands of cycles. With a dedicated technical support team, we can assist with mounting design, lubrication recommendations, and custom modifications to meet your exact requirements.
Ready to enhance your robotic system? Contact us today for a quote, technical drawing, or sample testing. We welcome OEM/ODM inquiries and look forward to being your long-term partner in precision motion solutions.
Frequently Asked Questions (FAQ)
1. What is the maximum moment load for this bearing?
The static moment capacity is 2.5 kNm as rated. For dynamic applications, the permissible moment load may be lower depending on speed and life requirements. We can provide detailed load-life calculations upon request.
2. Can the outer diameter be customized to fit my robot joint housing?
Yes. While the inner diameter is fixed at 300 mm, the outer diameter, mounting hole pattern, and overall height can be customized. Contact our engineering team with your dimensional constraints.
3. What lubricant is used, and how often should it be re-greased?
Standard bearings are pre-lubricated with lithium-based grease suitable for -20°C to +80°C. Re-greasing intervals depend on operating conditions, typically every 2,000–5,000 operating hours. We also offer food-grade grease for hygienic environments.
4. Does the IP65 seal require maintenance or replacement?
The double lip seal is designed for long life with minimal maintenance. In extremely dirty or abrasive environments, we recommend periodic inspection and replacement (typically every 3–5 years).
5. Is this bearing suitable for high-speed rotation?
Cross roller bearings are generally used for low to moderate speeds (up to 30–50 rpm) due to the sliding contact of rollers. For higher speeds, consider a ball-type slewing ring. However, for robotic joints with intermittent motion, this bearing performs excellently.
6. What mounting tolerances are required for the housing and shaft?
We recommend a housing bore tolerance of H7 and shaft tolerance of h6 for the inner ring mounting. Detailed mounting instructions are provided with each bearing.
7. Can you provide a 3D CAD model for design integration?
Yes, we can provide STEP, IGES, or SolidWorks files upon request. Please contact our sales team with your preferred format.
8. What is the typical lead time for an order of 10 units?
Standard lead time is 20–30 working days for quantities up to 50 units. For urgent orders, express delivery can be arranged with additional charges.
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