Cross Roller Slewing Bearings: Precision Rotation for High-Stiffness Applications
What Is a Cross Roller Slewing Bearing?
A cross roller slewing bearing is a type of precision rotational bearing that features cylindrical rollers arranged alternately in perpendicular (90-degree) orientations between two raceways. This crossed arrangement allows the bearing to simultaneously handle axial, radial, and moment loads while maintaining high rigidity and minimal rotational clearance.
Because of their compact structure and high rotational accuracy, cross roller slewing bearings are widely used in equipment where both precision and load-bearing capacity are critical. This includes medical imaging systems, industrial robots, radar antennas, and machine tools.
Unique Benefits of Cross Roller Slewing Bearings
High Rigidity in a Compact Form
The orthogonal roller arrangement offers significantly higher stiffness compared to ball slewing bearings, even in small spaces. This allows for precise control of rotation under load.
Accurate Positioning
Thanks to their low friction and backlash, cross roller slewing bearings provide smooth, accurate rotation—making them ideal for devices requiring high repeatability.
Combined Load Support
These bearings efficiently manage axial, radial, and tilting moment loads at the same time, reducing the need for multiple bearing sets or complex assemblies.
Space Optimization
The compact design minimizes thickness and simplifies integration in tight enclosures—critical for surgical robots or semiconductor processing machines.
Where Are Cross Roller Slewing Bearings Used?
| Industry | Use Case |
| Medical Equipment | CT and MRI gantry rotation, surgical robots |
| Robotics | Joint rotation, base turntables |
| Aerospace | Satellite antenna positioning systems |
| Optical Systems | Precision lenses and telescope tracking |
| CNC & Machine Tools | Rotary tables, indexing systems |
| Military Systems | Radar dishes, missile launcher bases |
LDB’s Cross Roller Slewing Bearing Solutions
As a long-standing manufacturer and global supplier, LDB offers cross roller slewing bearings engineered for high-performance applications. Our portfolio includes:
Standard cross roller slewing bearings with outer diameters from 200mm to 1500mm
Geared and non-geared configurations (internal, external, or gearless)
Split-type designs for easy maintenance in compact structures
Preloaded systems for zero-backlash motion
Stainless steel options for cleanroom and medical use
Design Highlights:
Integrated sealing rings
Ultra-smooth raceway grinding
Precision heat-treated rollers
Dual-row or tapered cross roller configurations for added capacity
LDB’s cross roller series is trusted by clients in Japan, Germany, and the US for applications where failure is not an option.
Pricing and Procurement Considerations
Price factors include:
Diameter and load rating
Gear module and accuracy grade
Coating (e.g., phosphate, black oxide, nickel-plated)
Customization of bolt holes or preload
Typical Price Range: USD $500 – $5,000 per unit (High-precision or large-diameter types may vary above this range.)
When selecting a cross roller slewing bearing, consult your manufacturer or supplier for 3D models, load-life calculations, and installation drawings.
Request your quote today via www.ldb-bearing.com.
Installation Tips
Ensure flatness and parallelism of the mounting surface
Do not apply force directly on the bearing face during installation
Use torque-controlled tightening on bolts
Apply uniform preload where applicable
Lubricate thoroughly before first use and follow re-greasing intervals
Why Choose LDB for High-Precision Bearings?
20+ years of bearing production excellence
In-house design and manufacturing for special orders
Strict quality control with full traceability
ISO 9001, CE, and medical device component certifications
Rapid response on RFQs and technical consultations
LDB’s cross roller slewing bearings meet the world’s most demanding requirements—from operating rooms to orbital satellites.
Final Thoughts
When accuracy and reliability are non-negotiable, cross roller slewing bearings are the solution. Their ability to combine precision, strength, and compact form makes them indispensable in today’s high-tech machinery.
LDB brings decades of experience and a global network to support your project from design through delivery. Let us help you build smoother, stronger, smarter motion systems.
Explore our product range or request support at www.ldb-bearing.com.