HJB.45.1700

HJB Crossed Roller bearing
  • HJB Crossed Roller bearing
  • HJB Crossed Roller bearing

HJB.45.1700-HJB Crossed Roller bearing

The single-row crossed roller slewing bearing series is a precision rotational component engineered for applications that demand high accuracy, exceptional rigidity, and flexible drive integration. This gearless design features cylindrical rollers arranged in a crossed pattern, offering superior performance for precision-critical equipment where the drive system is best implemented externally.



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



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

HJB Crossed Roller bearing
Type :HJB.45.1700
Brand :LYMC
Dimensions
D (mm) :1875
d (mm) :1525
H (mm) :140
Mounting Dimensions
D1 (mm) :1815
D2 (mm) :1585
n :42
Φ (mm) :29
Structural Dimensions
n1 (mm) :6
D3 (mm) :1703
d1 (mm) :1697
H1 (mm) :122
h (mm) :18
Weight (kg) :844

Characteristics

✦ Roller arrangement – Cylindrical rollers are alternately oriented at 90° in a single raceway, with each roller maintaining line contact with both axial and radial raceways.

✦ Plain ring surfaces – Both inner and outer rings feature smooth cylindrical surfaces without gear teeth, allowing flexible external drive integration.

✦ One-piece forged rings – Both rings are manufactured as single-piece forgings, ensuring seamless material integrity without welded or bolted joints.

✦ Raceway finish – Raceways are ground to P5 tolerance class with a surface finish of 0.4 µm Ra.

✦ Heat treatment – Raceways hardened to 58–62 HRC with a case depth of 2.0–3.0 mm.

✦ Sealing system – Seal grooves are machined into both rings to accommodate standard NBR or FKM lip seals.


Features

✦ Accommodates misalignment – The crowned raceway profile allows for minor angular misalignment between mounting surfaces.

✦ Provides long-term dimensional stability – The sub-zero treatment minimizes retained austenite, ensuring consistent geometry over the bearing's service life.

✦ Quickens seal replacement – The dovetail groove allows seals to be snapped in and out without tools, shortening downtime.

✦ Supports bidirectional mounting – Alternating threaded/clearance holes allow attachment from either ring face.

✦ Reduces noise in high-speed operation – The micro-ground surface finish (0.25 µm Ra) minimizes vibration and noise generation.

✦ Eliminates gear-matching constraints – Smooth ring surfaces allow direct integration with belts, chains, or friction drives.


Further Reading