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Henan San Kuang Machinery Technology Co., Ltd., established in 2014 and headquartered in Luoyang, Henan, China, is a professional manufacturer specializing in precision bearings. With a factory spanning 10,000–30,000 square meters and a dedicated team of 51–100 employees, we are committed to delivering high-quality crossed roller bearings that meet the rigorous demands of modern automation and precision machinery. Our Crossed Roller Bearing with Lubrication Holes and Seals is engineered for maintenance-free operation, combining robust sealing technology with integrated lubrication channels to extend service life and reduce downtime. This product is the ideal solution for applications requiring high rigidity, compact design, and reliable performance under challenging conditions.
Our crossed roller bearings feature a unique design where cylindrical rollers are arranged crosswise between inner and outer rings, providing exceptional load capacity in both radial and axial directions. The addition of lubrication holes allows for efficient grease replenishment without disassembly, while integrated seals protect against contaminants, ensuring a truly maintenance-free experience. Below, we detail the key technical specifications and advantages of this bearing.
Key Features and Technical Specifications
Maintenance-Free Design: Pre-lubricated with high-quality grease and sealed to prevent leakage. The lubrication holes enable easy re-greasing if needed, extending bearing life without regular maintenance.
High Rigidity and Load Capacity: Crossed roller arrangement provides high rigidity and supports combined loads (radial, axial, and moment) with minimal elastic deformation.
Compact and Lightweight: Suitable for space-constrained applications such as robot joints, rotary tables, and medical imaging equipment.
Precision Performance: Available in precision grades P0, P6, P5, and P4 (optional) to meet specific accuracy requirements. Runout and rotational accuracy are tightly controlled.
Sealing Options: Rubber seals (contact type) or metal shields (non-contact type) are available to suit different environments, from dust-prone workshops to cleanroom settings.
| Parameter | Specification |
|---|---|
| Inner Diameter Range | 20 mm – 300 mm (customizable) |
| Outer Diameter Range | 50 mm – 500 mm (customizable) |
| Width Range | 10 mm – 60 mm (customizable) |
| Dynamic Load Rating (C) | Depends on dimension; up to 150 kN |
| Static Load Rating (C0) | Depends on dimension; up to 200 kN |
| Limiting Speed | Up to 2000 rpm (grease lubrication) |
| Operating Temperature | -20°C to +120°C (standard grease) |
| Seal Type | Rubber seal (contact) or metal shield (non-contact) |
| Lubrication Holes | Standard on both inner and outer rings |
The lubrication holes are strategically positioned to allow fresh grease to be introduced directly into the roller contact area, flushing out old grease and contaminants. This feature significantly reduces the need for frequent bearing replacement, making it an excellent choice for applications where access is difficult or downtime is costly. The seals are made of high-quality nitrile rubber or stainless steel, providing reliable protection against dust, moisture, and other particulate matter.
Compared to conventional crossed roller bearings, our design offers a longer service life and lower maintenance costs. Typical applications include: industrial robots, collaborative robots, medical CT scanners, machine tool rotary tables, semiconductor manufacturing equipment, and aerospace actuators. The bearing can be customized with different materials (e.g., stainless steel for corrosive environments) and special coatings for extreme conditions.
At Henan San Kuang Machinery Technology Co., Ltd., we take pride in our manufacturing capabilities and quality control. Our factory is equipped with advanced CNC grinding machines, precision measuring instruments, and assembly lines that ensure consistent product quality. We have a dedicated R&D team that works closely with clients to develop custom solutions. With an annual export value of US$2.5 Million – US$5 Million, we ship to ports such as Shanghai, Lianyungang, Qingdao, and Tianjin, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. Our company holds certifications including ISO9001, ISO14000, OHSAS18001, and others, reflecting our commitment to quality management and environmental responsibility.
Choosing our Crossed Roller Bearing with Lubrication Holes and Seals means investing in reliability, efficiency, and long-term performance. We invite you to contact us for a quotation or to discuss your specific requirements. Our team is ready to provide technical support and samples for evaluation. Experience the difference of a maintenance-free bearing that keeps your machinery running smoothly.
Frequently Asked Questions
Q: What does “maintenance-free” mean in this bearing?
A: The bearing is pre-lubricated with high-quality grease and sealed to prevent contamination. The lubrication holes allow for occasional re-greasing if needed, but in most applications, the initial grease lasts for the bearing’s life under normal operating conditions.Q: Can the lubrication holes be omitted?
A: Yes, we offer the option without lubrication holes for applications where re-greasing is not required. However, the standard design includes holes for maximum flexibility.Q: What seal types are available, and which is better?
A: We offer rubber contact seals (better protection against contaminants) and metal shields (lower friction, suitable for higher speeds). The choice depends on your operating environment and speed requirements.Q: What precision grades are available?
A: Standard grades include P0, P6, P5, and P4 (ISO or ABEC equivalents). Higher precision like P4 is available upon request for applications demanding ultra-low runout.Q: Can you provide custom dimensions or special materials?
A: Absolutely. We offer customization of inner/outer diameter, width, material (e.g., stainless steel, ceramic coating), and seals. Please provide your drawing or specifications.Q: What is the typical lead time?
A: For standard sizes, lead time is 15–30 working days. Custom orders may require 30–45 working days depending on complexity.Q: Do you provide samples for testing?
A: Yes, we can provide samples for evaluation. Sample cost and shipping are negotiable, especially for potential bulk orders.Q: What certifications do you have for this product?
A: Our company is certified under ISO9001, ISO14000, OHSAS18001, and many other standards. While the bearing itself does not carry a specific product certification, our manufacturing process is strictly controlled to meet international quality requirements.
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