News

What is an SX Crossed Roller Bearing?

An SX crossed roller bearing is a high-precision, compact bearing with a split outer ring and an integral inner ring, featuring cylindrical rollers arranged in an 'X' pattern (90° to each other) to support heavy radial, axial, and moment loads simultaneously, offering superior rigidity and accuracy for robotics, machine tools, and medical equipment where space saving is crucial.

Features of SX Crossed Roller Bearing

Ultra-high load-bearing capacity:The optimized contact design between rollers and raceways enables the bearing to achieve a maximum axial load capacity of 560 KN and a radial load capacity of 395 KN, which is over 50% higher than that of conventional crossed roller bearings, and can stably withstand ultra-heavy composite loads.

Precise preload adjustable:The split inner and outer ring structure allows precise preload control by adding or removing adjustment shims, effectively improving the rigidity and rotational accuracy of the system, and meeting the high-precision positioning requirements under heavy-load conditions.

Stable installation and positioning:The bearing is equipped with a precision-machined shoulder structure with standard positioning surfaces and greasing holes, which simplifies the installation and lubrication maintenance process. It is compatible with standard interference fits (shaft h6/bore H7), ensuring coaxiality and operational stability under heavy loads.

Strong rigidity and wear resistance:Adopting high-load reinforced materials (GCr15 high-carbon chromium steel or SUS440C stainless steel) and crossed roller layout, its deformation resistance is increased by more than 4 times. The roller end faces are precision polished (Ra≤0.08μm), and the fatigue life and wear resistance are increased by 40%.

Wide environmental adaptability:It provides two sealing options: open type (suitable for clean, high-load, medium-low speed environments) and UU/U contact rubber seal type (dustproof and splash-proof, applicable to dusty and humid industrial scenarios). It can work stably in the temperature range of -30°C to 80°C. 6. Flexible customization supportIt supports non-standard customization of size, shoulder specifications (DE/DI), and greasing hole positions, as well as the customization of corrosion-resistant materials and high-low temperature lubrication solutions to meet the diverse needs of different industries.

Applications of SX Crossed Roller Bearing

Industrial and collaborative robots:It is widely used in robot arm joints (wrist, elbow, shoulder) and harmonic drive output supports. Its high rigidity and moment resistance can improve the positioning accuracy and repeatability of robots, ensuring stable operation of heavy-load robots.

Precision rotary tables:It is applicable to CNC indexing tables, precision positioning rotary tables, and laser processing rotary units. The bolt-on installation structure simplifies assembly and maintains high angular accuracy under load.

Semiconductor manufacturing equipment:It is used in wafer handling arms, lithography alignment systems, and inspection platforms. Its stable torque and high rigidity support micron-level precision, meeting the strict requirements of semiconductor manufacturing processes.

Medical equipment:It is integrated into surgical robots, medical imaging system rotation units, and patient positioning mechanisms. Its compact design, smooth operation, and low noise characteristics are suitable for the sensitive environment of medical devices.

Aerospace and defense systems:It is applied to UAV gimbal systems, satellite antenna drives, and radar rotation units. Its lightweight and high-rigidity design can adapt to the mission-critical application scenarios of aerospace equipment.

Automation and inspection equipment:It is used in pick-and-place machines, vision inspection rotary units, and precision assembly equipment, which can reduce the overall size of the equipment while bearing composite loads

Factors Affecting the Price of SX Crossed Roller Bearing

Size and load rating:The larger the inner diameter (70–500 mm) and outer diameter (90–620 mm), the more raw materials are consumed, and the higher the processing difficulty, resulting in a higher price. Bearings with ultra-high load ratings also require special material treatment, which further increases the cost.

Precision grade:Precision grades are divided into P5, P4, and P2. High-precision bearings (P2/P4) need to go through strict grinding and precision testing processes, and their prices are 40%–70% higher than those of P5 grade bearings.

Material selection:Bearings made of SUS440C stainless steel (corrosion-resistant) are 50%–80% more expensive than those made of conventional GCr15 steel. If custom composite materials are used for cages, the cost will increase accordingly.

Structural complexity:Customized structures such as special shoulder specifications, greasing hole position adjustment, and ZZ labyrinth seals will add processing steps, and the price is higher than that of standard open-type bearings.

Customization requirements:Non-standard size customization, high-low temperature lubrication solutions, and corrosion-resistant modification need to be redesigned and tested, which increases the R&D and production costs, and the unit price is increased by 30%–60%.

Order quantity:Bulk orders (≥300 pieces) can enjoy a 15%–25% quantity discount; small-batch orders (≤50 pieces) or urgent orders (delivery within 10 days) will incur additional scheduling and logistics costs.

What Factors Should Be Considered When Purchasing SX Crossed Roller Bearing

Matching of working conditions:Clarify key parameters such as operating load, speed, working temperature, and environmental cleanliness. For high-dust environments, select UU/U sealed bearings; for high-temperature scenarios, choose GCr15 material with high-temperature special grease.

Confirmation of size and precision:Determine the inner diameter, outer diameter, cross-section height (10–56 mm) and precision grade according to the equipment design drawings. For precision equipment such as semiconductor lithography machines, P2/P4 high-precision bearings should be prioritized.

Selection of materials and sealing:For general heavy-load conditions, GCr15 steel can meet the requirements; for corrosive environments, SUS440C stainless steel should be selected and matched with corrosion-resistant grease. The open-type structure is suitable for clean and high-speed working conditions, while the sealed type is suitable for complex industrial environments.

Assessment of supplier qualifications:Verify the supplier's production capacity (such as CNC precision grinding equipment and load performance testing instruments), quality certifications (ISO9001), and after-sales service capabilities, and prioritize suppliers with professional experience in the production of SX series bearings.

Balance of cost-effectiveness:Compare the technical parameters and prices of different suppliers. Domestic brands such as NewBee Transmission can replace imported brands such as IKO, with a cost advantage of 30%–50% and flexible customization services.

Supplier of SX Crossed Roller Bearing

NewBee Transmission is a professional supplier of high-quality SX Crossed Roller Bearings, committed to providing reliable heavy-load bearing solutions for global customers in robotics, aerospace, and precision machinery industries.

Comprehensive product range:The standard SX series covers inner diameters of 70–500 mm, outer diameters of 90–620 mm, and cross-section heights of 10–56 mm, with precision grades from P5 to P2, and provides open-type and UU/U sealed-type options.

Advanced manufacturing capabilities:The company adopts international advanced CNC grinding machines and heavy-load performance testing equipment, and implements strict quality control throughout the production process, including roller sorting, raceway precision grinding, and fatigue life testing, to ensure product consistency and reliability.

Professional customization services:It can provide one-stop customization solutions such as non-standard size design, shoulder specification adjustment, material modification, and special lubrication scheme customization, and provide technical support from product design to after-sales.

Reliable quality assurance:All products comply with ISO9001 quality management system standards, with a product warranty period of 1.5 years. The company has a perfect after-sales service system, providing on-site installation guidance and maintenance training.

High cost-effectiveness:Relying on localized production and optimized supply chain management, the product price is 30%–50% lower than that of imported brands, and the delivery cycle is short (7–15 days for standard models, 6–12 weeks for customized models).

Precautions for Using SX Crossed Roller Bearing

Standardized installation operation:-Before installation, thoroughly clean the installation surface to ensure no burrs, oil stains, or impurities, and the perpendicularity of the shaft shoulder should be ≤0.005 mm/m.-Use special pressing tools for assembly, apply force evenly on the bearing ring, and prohibit hammering to avoid damage to the raceway. - Adjust the preload accurately through shims according to the working load requirements, and ensure that the axial runout after installation is ≤0.003 mm.

Scientific lubrication maintenance:- Open-type bearings need regular external lubrication, and the lubricating grease should be replaced every 1500–2500 working hours; sealed bearings should be checked regularly for grease leakage. - Select the appropriate lubricating grease according to the working temperature. High-temperature environments should use high-temperature resistant grease, and corrosive environments should use corrosion-resistant grease.

Operation status monitoring:- During operation, monitor the bearing temperature in real time. The typical temperature rise should be ≤16°C. If the temperature is too high, check whether the lubrication is sufficient or whether the installation is misaligned. - Regularly check the vibration and noise of the bearing. Abnormal vibration or noise may indicate problems such as bearing wear or overload, and the equipment should be shut down for inspection in time.

Proper storage and handling:- Store the bearing in a clean, dry, and ventilated environment with a humidity ≤60%. Avoid direct contact with corrosive substances such as acids and alkalis. - When transporting the bearing, use shockproof packaging, avoid collision and falling, and place the split ring horizontally to prevent deformation.

Technical Specifications of SX Crossed Roller Bearing

For technical specifications, pricing, or custom engineering solutions:

Email: paul@newbeetrans.com

Website: www.newbeetrans.com