SUN 455 25 01 CC LM

SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings
  • SUN Ungeared slewing bearings

SUN 455 25 01 CC LM-SUN Ungeared slewing bearings

The SUN series covers a full range of gearless four-point contact ball slewing bearings, purpose-built for light to medium-duty rotary applications that prioritize flexible assembly, smooth motion output and low operational maintenance. Differing from traditional geared slewing rings that rely on tooth meshing for power transmission, this toothless series adopts a pure rotary structural design. It integrates streamlined mechanical profiling, optimized raceway matching and reliable material durability, delivering consistent and precise rotary performance for automation equipment, new energy machinery and general industrial rotary systems.


Typical Applications:

Construction machinery such as cranes and excavators

Aerial work platforms and man lifts

Solar tracking systems

Radar and antenna positioning systems

Materials handling and conveying 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

SUN Ungeared slewing bearings
Type :SUN 455 25 01 CC LM
Brand :LYMC
Drawing No. :Drawing 4
Outline Dimensions
Da[mm] :455
Di[mm] :265
U[mm] :71
C[mm] :450
da f9[mm] :270
di h9[mm] :
Outer Holes
La[mm] :420
na :24
φa :φ18
Inner Holes
Li[mm] :300
ni :24--1
φni :φ18
Weight
[KGS] :58
Related Types :VU 25 0433 N

Characteristics

✦ Four-point ball contact geometry – Single-row configuration with balls contacting the raceway at four points.

✦ Toothless ring surfaces – Both inner and outer rings have plain cylindrical faces without gear teeth.

✦ Induction-hardened raceways – Rolling paths hardened for wear resistance and extended fatigue life.

✦ Sealed raceway enclosure – Equipped with NBR rubber lip seals on both sides of the rolling chamber.

✦ Alloy steel ring material – Rings manufactured from high-strength alloy steel grades.

✦ Equispaced mounting holes – Both rings drilled with a uniform pattern of bolt holes for bolted attachment.


Features

✦ Flexible drive integration – Toothless rings allow custom drive selection, including pinions, belts, or friction wheels.

✦ Simplified system design – No gear teeth means one less precision component to specify and maintain.

✦ Cost-effective solution – Eliminating gear cutting reduces manufacturing cost compared to geared versions.

✦ Easier cleaning and maintenance – Smooth ring surfaces do not trap debris or contaminants.

✦ Reduced operating noise – No gear meshing ensures quieter machine operation.

✦ Lower rotational resistance – Friction-free toothless surface contributes to smooth, low-torque rotation.

Further Reading