How Precision RA Crossed Roller Bearings Are Applied in Machine Tool Rotary Tables?

What Are Precision RA Crossed Roller Bearings?

Precision RA crossed roller bearings are high-precision rotary components specially designed for precision rotary systems.They adopt a 90° orthogonal crossed roller layout between the inner and outer rings,which enables a single bearing to bear radial loads,axial loads and overturning moment loads at the same time without additional bearing combinations.These bearings feature an integrated inner ring structure to enhance system rigidity and simplify installation,and optional preload configuration can eliminate internal clearances.With accuracy grades up to P4 and P2,their inner diameters range from 50mm to 200mm and section heights from 8mm to 13mm.The base materials are GCr15 high-carbon chromium steel or SUS440C stainless steel,matched with a double-seal structure (UU/U) for dust and liquid protection,or an open type for clean environments.The precisely ground raceways ensure a run-out tolerance of ≤0.002mm,and the surface hardness reaches HRC 60-62 for excellent fatigue resistance and long service life.

What Are Machine Tool Rotary Tables?

Machine tool rotary tables are core precision rotary positioning components of CNC machine tools,mainly including 4th and 5th axis indexers of CNC machining centers,grinding machine rotary tables and precision indexing heads.They are used to realize precise rotation,indexing and multi-angle machining of workpieces in cutting,grinding and automated assembly scenarios.Such equipment has extremely strict performance requirements: it needs to withstand strong cutting forces without deformation,maintain micron-level positioning accuracy and repeatability,realize zero-backlash rotation,and adapt to the compact internal space of machine tools while ensuring long-term stable operation in industrial processing environments.

The Importance of RA Crossed Roller Bearings in Machine Tool Rotary Tables

RA crossed roller bearings are the key core components of machine tool rotary tables,and their performance directly determines the machining accuracy,rigidity and service life of the rotary tables.

Composite load-bearing capacity:They can simultaneously bear radial,axial and overturning moment loads,replacing the combination of multiple bearings to simplify the structure of the rotary table and reduce assembly errors,so as to stably bear complex loads in the cutting process.

Ultra-high rigidity:The crossed roller layout maximizes the contact area and reduces deformation,providing rigid support for the rotary table to resist cutting forces and ensure no deflection during machining.

Ultra-high rotation precision:With P4/P2 precision and run-out tolerance ≤0.002mm,they meet the nanometer-level positioning requirements of precision machining and guarantee the machining accuracy of workpieces.

Compact and space-saving:The thin-section design is highly compatible with the space-limited structure of machine tool rotary tables,helping to realize a miniaturized and lightweight design of the whole machine.

Zero backlash and stable operation:The optional preload configuration eliminates internal clearances,realizing zero-backlash rotation and high-precision indexing,which is critical for precision indexing heads.

Low friction and long service life:The optimized roller end-face geometry reduces sliding friction,lowering temperature rise and energy consumption.The hardened material and strict manufacturing process ensure long-term stable operation of the rotary table.

Reliable sealing protection:The double-seal (UU/U) structure effectively blocks dust,cutting fluid and impurities,adapting to the harsh industrial environment of machine tool processing.

Manufacturer of RA Crossed Roller Bearings

Newbeetrans is a professional manufacturer of RA crossed roller bearings with mature supporting solutions for machine tool rotary tables.

Rapid delivery & customization Standard:RA series products are shipped within 72 hours,and customized specifications (non-standard dimensions,special lubricating greases,ceramic roller hybrid designs) can be completed in 10–15 days to meet the personalized needs of different machine tool rotary tables.

Precision manufacturing capacity:Equipped with high-precision grinding equipment and heat-treatment production lines,it adopts precision grinding processes to stably produce P4/P2 precision bearings,ensuring the consistency of dimensional accuracy and performance.

Full-process quality control:Strict quality inspection is carried out on raw materials,key dimensions,noise,vibration and service life,and the bearings have passed relevant certifications to guarantee the reliability of machine tool applications.

For technical specifications,pricing,or custom bearing solutions:

Email:paul@newbeetrans.com

Website:www.newbeetrans.com