XI 503500N 

XI XSI Ring bearing
  • XI XSI Ring bearing
  • XI XSI Ring bearing

XI 503500N -XI XSI Ring bearing

The XI and XSI series represent a refined category of single-row crossed roller slewing bearings with internal gearing, engineered for applications requiring compact design, high rotational accuracy, and robust load-carrying capacity. These units integrate a precision-ground internal gear tooth profile directly into the inner ring, enabling direct torque transmission from a pinion drive while maintaining a low-profile mounting envelope.


Typical Applications:

Robotic manipulators and indexing turntables

Medical imaging gantries and inspection equipment

Antenna and radar pedestals

Aerospace test fixtures and simulation platforms

Wind turbine pitch and yaw controls 



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

XI XSI Ring bearing
Type :XI 503500N 
Brand :LYMC
Boundary Dimension (mm)
Da :3200
D :3690
H :138
Mounting Dimension
La :3630
Li :3370
n1 :124
n2 :124
φ1 :33
φ2 :33
Structure Size
b :124
h :14
B :124
C :124
Di :3502
da :3498
Teeth Information
m :20
z :162
do :3240
Loading :14100
Weight (kg) :2170

Characteristics

✦ Roller-race contact geometry – The single raceway is ground with a Gothic-arch profile, guiding rollers into two-point contact with each raceway for enhanced load distribution.

✦ Internal gear tooth form – Gear teeth on the inner ring bore feature a 14.5° pressure angle, reducing sliding friction during meshing for smoother operation.

✦ Outer ring split design – The outer ring is manufactured in two halves, joined by dowel pins and cap screws, allowing rapid assembly around existing shafts.

✦ Raceway surface texture – Rolling paths are superfinished to 0.2 µm Ra, minimizing rolling resistance and heat generation at high speeds.

✦ Carburizing heat treatment – Rings undergo case-carburizing to 1.5–2.0 mm depth, creating a tough core with a wear-resistant surface of 60–64 HRC.

✦ Labyrinth seal integration – The rings include interlocking labyrinth channels that provide non-contact sealing, eliminating wear while excluding coarse contaminants.


Features

✦ Reduces heat generation at high speeds – The superfinished raceway surface minimizes rolling friction, keeping operating temperatures low during high-speed operation.

✦ Simplifies installation in tight spaces – The split outer ring design allows assembly without removing adjacent shafts or structures, saving installation time.

✦ Improves gear meshing smoothness – The 14.5° pressure angle reduces sliding friction, enabling smoother gear engagement and lower noise levels.

✦ Eliminates seal wear – The labyrinth seal design provides non-contact protection, ensuring long-term sealing reliability without friction-related wear.

✦ Enhances shock absorption – The carburized case-hardened structure absorbs impact loads while maintaining surface hardness for wear resistance.

✦ Adapts to non-standard flange interfaces – Customizable bolt circle configurations allow direct mounting to existing machinery without adapters.


Further Reading