33109101

Crossed rollers without gear 08
  • Crossed rollers without gear 08
  • Crossed rollers without gear 08

33109101-Crossed rollers without gear 08

The gearless single-row crossed roller slewing bearing is a precision rotational component developed for applications where high accuracy and rigidity are essential, yet integral gearing is not required. This design separates the bearing function from the drive system, allowing for greater flexibility in machine layout and drive selection while maintaining the superior load-handling characteristics of crossed roller technology.


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

Crossed rollers without gear 08
TYPE REFERENCES :33109101
Brand :LYMC
Weight
KGS :78
Dimensions
De :1166
Di :1022
Ce :164
Ci :1024
Fe :1140
Fastenting
Ne :48
Fi :1048
Ni :48

Characteristics

✦ Roller-race contact – Each cylindrical roller contacts both raceways through a 45° contact angle, achieving balanced load distribution.

✦ Ring surface – Both rings are finished with plain cylindrical surfaces, free of gear tooth features.

✦ Ring production – Rings are produced via ring rolling process from vacuum-degassed steel, ensuring fine grain structure.

✦ Raceway tolerance – Raceways are ground to P4 tolerance class with a surface finish of 0.25 µm Ra.

✦ Hardness profile – Rolling surfaces hardened to 60–64 HRC with a case depth of 2.5–3.5 mm.

✦ Seal groove design – Grooves are machined with a rectangular profile and undercut relief for secure seal retention.


Features

✦ Minimizes stress concentration – The 45° contact angle distributes forces evenly across the roller-race interface.

✦ Provides higher precision – The P4 tolerance class delivers superior rotational accuracy for precision applications.

✦ Withstands heavy shock loads – The deeper hardened case provides impact resistance for heavy-duty cycles.

✦ Prevents seal slip-out – The rectangular groove with undercut locks seals mechanically, preventing displacement.

✦ Allows flexible mounting – Threaded and clearance hole options accommodate various attachment methods.

✦ Reduces noise in continuous operation – The fine surface finish and optimized geometry minimize vibration.


Further Reading