31-32 3550/2-07340

320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing
  • 320 325 332 340 350 Triple row roller bearing

31-32 3550/2-07340-320 325 332 340 350 Triple row roller bearing

The three-row roller slewing bearing series with external gear is engineered for extreme-duty rotating applications where maximum load capacity, superior rigidity, and long-term reliability are non-negotiable. This design utilizes three independent rows of cylindrical rollers, each dedicated to a specific load direction, delivering performance levels that single-row and double-row configurations cannot match.



Application Areas:

Extra-heavy cranes and construction machinery

Large-scale excavators and mining equipment

Wind turbine yaw and pitch systems

Heavy-duty radar and antenna platforms

Industrial heavy turntables and rotary tables



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

320 325 332 340 350 Triple row roller bearing
Bearing Type :31-32 3550/2-07340
Brand :LYMC
Drawing No. :Drawing 3
Dimensions And Weight
Outside Diameter, Outer Ring
Da [mm] :3889.6
Inside Diameter,Inner Ring
di [mm] :3332
Inside Dia Outer Ring
Di [mm] :3580
Outside Diameter Inner Ring
da [mm] :3591
Weight
G [kg] :3249
Mounting Holes
Pitch Arde Diameter Outer Ring
La [mm] :3705
Pitch Arde Diameter Inner Ring
Li [mm] :3410
Number Of Holes Per Pitch Circle
n :66
Pitch Circle Diameter
d。 [mm] :3828
Gearing And Tooth Forces
Module
m :22
Number of Teeth
Z :174
Addendum Midiffication Coeff
x2 :0.5
Permissible Tooth Force
Fznom [kN] :295
Maximum Permissible Tooth Force
Fz max [kN] :525
Load Ratings
Static
Corad [kN] :2982
Coax T [kN] :30670
Coax H [kN] :18355
Dynamic
Crad [kN} :1266
Cax T [kN] :4603
Cax H [kN] :3277

Characteristics

✦ Maximum load capacity: Three dedicated roller rows provide unmatched axial, radial, and moment load handling

    Exceptional rigidity: Line contact roller geometry ensures superior structural stiffness

✦ Optimized load distribution: Each row is independently sized for its specific load direction

✦ Shock load resistance: Robust design withstands severe impact and vibration

✦ Extended service life: Durable construction ensures reliable performance in harsh environments

✦ Direct drive integration: External gear teeth allow simple and efficient pinion engagement


Features

✦ Handles compound loads effortlessly – The three-row design distributes axial, radial, and moment loads across dedicated roller paths, preventing stress overlap.

✦ Stable under dynamic loads – Cylindrical roller line contact maintains rotational accuracy even when load direction or magnitude changes suddenly.

✦ Minimizes structural deflection – The rigid bearing envelope reduces bending of adjacent machine frames under heavy lifts or digging forces.

✦ Reduces heat generation – Optimized cage pockets minimize roller sliding, keeping operating temperatures lower in high-speed cycles.

✦ Extends component life – Hardened raceways with deep case depth reduce indentation from contaminants, protecting the bearing from premature failure.


Further Reading