SUN Bearings

SUN Bearings

SUN Bearings

The gearless single-row crossed roller slewing bearing is a precision rotational component designed for applications where high accuracy, exceptional rigidity, and a clean, uncluttered interface are required. By omitting gear teeth from both rings, this design offers a straightforward solution for equipment that relies on external drive systems, providing engineers with the freedom to implement custom drive arrangements without compromising bearing performance.



Application Areas:

Robotics and automation equipment

Precision rotary tables and indexing systems

Radar and antenna positioning systems

Medical imaging and radiotherapy equipment

High-accuracy solar tracking systems

Machine tools and coordinate measuring equipment



  • SUN Bearings
  • SUN Bearings
  • SUN Bearings
  • SUN Bearings
InquiryTypeBrandDrawing No.Outer DiaOuter HolesInner HolesRelated TypesWeight
Da [mm]Di [mm]H [mm]U [mm]C [mm]da f9 [mm]di H9 [mm]LanaLini

This bearing series comprises an inner ring, an outer ring, and a single row of cylindrical rollers arranged in a crossed configuration between precision-ground raceways. Both rings are manufactured without gear teeth, resulting in a simple, smooth profile that facilitates easy integration into existing machine designs. The rollers are oriented with their axes alternating at 90-degree angles, creating an arrangement that efficiently manages axial loads from both directions, radial loads, and tilting moments simultaneously. The crossed roller geometry provides line contact with the raceways, delivering greater load-carrying capacity and enhanced rigidity compared to ball bearings of similar dimensions.

The elimination of gear teeth reduces manufacturing complexity, lowers production costs, and makes the bearing easier to handle during transportation and installation. Both rings incorporate mounting holes for secure bolted attachment to the machine structure.


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