Crossed Cylindrical Roller Bearings

Crossed Cylindrical Roller Bearings | High-Precision Solution for Compact Design

At Luoyang Heng Guan Bearing Technology, we manufacture crossed cylindrical roller bearings engineered for applications where space is limited but performance cannot be compromised. Our bearings feature cylindrical rollers arranged orthogonally at precise 90-degree angles within V-groove raceways. This configuration enables a single unit to handle radial, axial, and moment loads simultaneously. We produce sizes ranging from 20mm to 2000mm bore diameter, with ultra-thin cross-sections between 5mm and 50mm. Manufactured from GCr15 bearing steel rollers and 50Mn or 42CrMo alloy steel rings, our products meet precision grades from P0 to P4, backed by ISO9001 certification and over 20 years of manufacturing expertise.

Crossed Cylindrical Roller Bearings Details

Our crossed roller arrangement utilizes an interesting geometric structure. Adjacent rollers are placed opposite one another, separated by precision spacers. This eliminates the need for dual bearing arrangements. The V-groove raceway design distributes contact stress evenly across the roller length.

It delivers three-dimensional load capacity in a much thinner structure than conventional bearing assemblies. The crossed roller arrangement also eliminates internal clearance, delivering zero-backlash performance essential for high positioning accuracy.

Each bearing undergoes CNC precision machining on our vertical processing machines and grinding equipment. Heat treatment is performed under standardized controlled processes to achieve optimal hardness gradient. This ensures dimensional stability under thermal cycling and sustained load conditions.

Technical Specifications

Why Choose Us

Manufacturing Depth:

Our workshop is equipped with CNC vertical machines, quenching machines, adaptive shapers and grinding centers. This allows us to control every production process, from forging to final inspection.

Engineering Support:

Our 50-member professional engineering team provides bearing selection support, custom design services and installation guidance. We meet non-standard requirements, including reverse engineering based on physical samples when 3D drawings are unavailable.

Global Track Record:

We have exported to more than 50 countries across North America, Europe, the Middle East and the Asia-Pacific region. Our bearings operate reliably in extreme environments, from icy cold to desert high temperatures.

Quality Traceability:

Each production batch is supplied with complete material certification. We adopt coordinate measuring machines and vibration analyzers to verify product compliance before delivery. RoHS compliance is standard for all our product lines.

Features and Benefits

Space Efficiency:

The crossed roller design replaces two sets of precision contact bearings with a single compact unit. It reduces assembly height by up to 40%, ideal for robotic joints and medical gantries with strict space constraints.

High Rigidity:

Line contact between rollers and raceways delivers superior rigidity compared with point-contact ball bearings. It ensures minimal deflection under eccentric loads, maintaining equipment precision during continuous operation.

Zero Clearance:

Preloaded structures eliminate axial and radial play. For CNC rotary tables, it delivers consistent indexing accuracy without backlash, improving part tolerances and surface finish quality.

Multi-Directional Load Handling:

The 90° crossed roller arrangement enables simultaneous support of loads from all directions. It simplifies overall design by eliminating separate thrust bearings and radial bearings.

Smooth Operation:

Spacer-isolated rollers prevent roller skewing and direct component friction. This reduces vibration and noise, which is critical for medical imaging equipment requiring high patient comfort.

Applications

Industrial Robotics:

Crossed cylindrical roller bearings act as core components in RV reducers and joint modules of 6-axis robots. They withstand dynamic loads generated by extended robotic arms with payloads, ensuring repeatable positioning for welding and assembly operations.

Precision Machine Tools:

In 5-axis machining centers, our bearings support rotary tables under heavy cutting forces. The rigid structure prevents table deflection during milling operations, maintaining tight tolerances for complex geometries.

Medical Diagnostic Equipment:

CT gantries rotate continuously while supporting X-ray tubes and detectors. Our bearings deliver smooth, vibration-free motion for high-resolution imaging, and their compact design maximizes the clear bore diameter.

Semiconductor Manufacturing:

Wafer handling robots and lithography steppers require sub-micron positioning accuracy. The zero-backlash performance of crossed roller bearings ensures consistent wafer alignment throughout production cycles.

Defense and Aerospace:

Radar antenna positioners and optical tracking platforms adopt these bearings for stable, precise rotation under variable wind loads and extreme temperatures.

Testing & Certification

Every bearing undergoes a comprehensive inspection procedure:

• Spectral chemical analysis verifies material grade
• Ultrasonic testing detects internal defects
• CMM inspection ensures dimensional accuracy
• Surface hardness testing validates heat treatment results
• Tooth profile inspection guarantees gear precision

Our factory is ISO 9001 certified. All products comply with RoHS requirements for global markets.

Installation Guide

Mounting Surface Preparation:

Ensure mounting faces are flat within 0.02mm per 100mm. Remove burrs and clean surfaces with isopropyl alcohol. Any surface irregularity transfers directly to bearing performance.

Alignment:

Use dial indicators to verify concentricity during installation. Misalignment exceeding 0.05mm creates uneven load distribution and premature wear.

Bolt Torque Sequence:

Tighten mounting bolts in a star pattern to avoid ring distortion. Apply torque in three stages: 30%, 60%, then 100% of specification. Recheck after initial operation.

Lubrication:

Apply lithium-based grease (NLGI Grade 2) to raceways before assembly. For high-speed applications above 500 rpm, consult our engineering team for oil lubrication recommendations.

Seal Installation:

Position seals with chamfered edge facing inward. Avoid overstretching, which compromises sealing effectiveness and can introduce runout.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Maintenance and Care

Inspection Intervals:

Check for abnormal noise or temperature rise every 500 operating hours. Elevated vibration indicates contamination or wear requiring immediate attention.

Relubrication:

Grease-lubricated bearings typically require replenishment every 2000 hours under normal conditions. Harsh environments with dust or moisture exposure may require more frequent servicing.

Contamination Control:

Keep seals intact and mounting areas clean. Particles as small as 10 microns can indent raceways, creating noise and reducing life.

Storage:

Store unused bearings in original packaging within temperature range of 10-30°C and humidity below 60%. Preserve coating protects against corrosion for up to 12 months.

FAQ

Q: Can crossed roller bearings replace ball bearings in existing designs?

A: Yes, if space allows for the modified envelope. You'll gain rigidity and load capacity but may need to adjust lubrication methods due to different contact mechanics.

Q: What precision grade should I specify for robotic joints?

A: P5 grade suits most industrial robots. P4 grade is necessary for collaborative robots requiring exceptional positioning repeatability below 0.02mm.

Q: How do you handle custom bore diameters?

A: We manufacture custom sizes based on your drawings or physical samples. Lead time is typically 4-6 weeks depending on complexity and quantity.

Q: Are your bearings suitable for outdoor equipment?

A: Standard NBR seals protect against moisture and dust to IP54 level. For marine or chemical exposure, we offer upgraded sealing and corrosion-resistant coatings.

Q: What causes premature bearing failure?

A: Common causes include improper installation (misalignment), contamination ingress, inadequate lubrication, and overloading beyond rated capacity. Our team provides failure analysis support if issues arise.

Contact Us

Need technical assistance or a quotation? Our engineering team is ready to support your project requirements. Reach us at mia@hgb-bearing.com for crossed cylindrical roller bearings selection guidance and custom solutions.