HJN Type Bearings

HJN Type Bearings

HJN Type Bearings

The single-row crossed roller slewing bearing with internal gear is a precision rotational component engineered for applications requiring high accuracy, exceptional rigidity, and space-efficient design. This bearing type employs cylindrical rollers arranged in a crossed pattern with an internal gear configuration, offering superior performance for precision-critical equipment where gear protection and compact packaging are essential.


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



  • HJN Type Bearings
  • HJN Type Bearings
InquiryNo.Internal gear DL (mm)DimensionsMounting DimensionsStructural DimensionsGear dataGearcircumferential forceWeight (kg)
D (mm)d (mm)H (mm)D1 (mm)D2 (mm)nφ (mm)n1 (mm)D3 (mm)d1 (mm)H1 (mm)h (mm)b (mm)xM (mm)De (mm)zT10⁴N

This bearing series comprises an inner ring with integral internal teeth, an outer ring, and a single row of cylindrical rollers arranged in a crossed configuration between precision-ground raceways. 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 internal gear is machined directly on the inner ring, positioning the drive pinion within the bearing envelope. This internal arrangement offers several practical advantages: the gear teeth are protected from external contamination, debris, and physical damage; the overall footprint of the rotating assembly is reduced; and the machine design can be streamlined for improved efficiency. Both rings incorporate mounting holes for secure bolted attachment to the machine structure. The bearings are typically supplied with seals on both sides to prevent contamination and retain lubrication.


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