HJW.50.4030

HJW Types Slewing Bearing
  • HJW Types Slewing Bearing
  • HJW Types Slewing Bearing

HJW.50.4030-HJW Types Slewing Bearing

The single-row crossed roller slewing bearing series with external gear is designed for applications where high rotational accuracy, superior rigidity, and compact dimensions are essential. This bearing type features cylindrical rollers arranged in a crossed pattern between the raceways, providing exceptional load capacity and precision that exceeds conventional ball bearing designs.


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



High load-carrying capacity
Resistance to high and low temperatures
Noise-free operation
Strictly controlled tolerances and appropriate internal clearance
Long service life and low maintenance requirements
Prevention of unexpected downtime (avoiding bearing fracture, seizure, and safety incidents caused by such failures, with anti-tilting capability)

Dimension and Parameters

HJW Types Slewing Bearing
Brand :HJW.50.4030
External gear DL (mm) :LYMC
Dimensions
D (mm) :4370
d (mm) :3690
H (mm) :240
Mounting Dimensions
D1 (mm) :4270
D2 (mm) :3790
n :66
φ (mm) :40
Structural Dimensions
n1 (mm) :6
D3 (mm) :4033
d1 (mm) :4027
H1 (mm) :218
h (mm) :22
Gear data
b (mm) :190
x :1.4
M (mm) :22
De (mm) :4520.6
z :201
Gearcircumferential force
T10⁴N :53.6
Weight (kg) :7700

Characteristics

✦ Single-row crossed roller arrangement – Cylindrical rollers arranged alternately at 90° in a single raceway, ensuring each roller contacts both axial and radial raceways.

✦ External gear on outer ring – Gear teeth are precision-machined on the outer circumference, featuring a 20° pressure angle spur profile with induction-hardened flanks.

✦ One-piece ring design – Both inner and outer rings are forged and machined as single-piece components, eliminating joints that could compromise structural integrity.

✦ High-precision raceways – Raceways are ground and lapped to achieve surface roughness within 0.4 µm Ra for minimal friction.

✦ Selective hardening – Raceways hardened to 58–62 HRC with a case depth of 2.0–3.0 mm, while gear teeth maintain a hardness of 45–50 HRC for toughness.

✦ Integrated seal grooves – Seal channels are machined into both rings to accept standard NBR, FKM, or silicone seals.


Features

✦ High load capacity in small envelope – The crossed roller design allows heavy loads to be carried in a fraction of the space required by traditional bearings.

✦ Zero-clearance operation – The alternating roller arrangement eliminates internal clearance, enabling precise positioning without backlash.

✦ Reduces system complexity – Integrated external gear eliminates the need for separate gear components, simplifying the overall machine design.

✦ Smooth rotation at high speeds – The lapped raceway surfaces and optimized roller geometry reduce friction, allowing smooth rotation even at elevated speeds.

✦ Simplifies maintenance – The single-row design allows easy access to all rollers for inspection or replacement without complex disassembly.

✦ Resists contamination – Integrated seal grooves allow effective sealing, protecting the bearing from dust and moisture.


Further Reading