ER3.32.2800.400-1SPPN

ER3.20 25 32 40 Types of slew ring
  • ER3.20 25 32 40 Types of slew ring
  • ER3.20 25 32 40 Types of slew ring
  • ER3.20 25 32 40 Types of slew ring

ER3.32.2800.400-1SPPN-ER3.20 25 32 40 Types of slew ring

The three-row roller slewing bearing series with external gearing represents a robust solution for heavy-duty rotating applications requiring maximum load capacity and structural integrity. This design incorporates three independent rows of cylindrical rollers, each dedicated to handling specific load directions, making it one of the most capable slewing bearing configurations available for demanding industrial environments.



Application Areas:

Extra-heavy cranes and construction machinery

Large-scale excavators and mining equipment

Wind turbine yaw mechanisms

Heavy-duty radar and antenna platforms

Industrial heavy turntables



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

ER3.20 25 32 40 Types of slew ring
Type :ER3.32.2800.400-1SPPN
Drawing No. :LYMC
Brand :Drawing 2
Dimensions
De[mm] :3136
de[mm] :2830
di[mm] :2841
Di[mm] :2582
He[mm] :139
Hi[mm] :172
Ht[mm] :181
Holes
Fe[mm] :2955
Fi[mm] :2660
N :48
V[mm] :39
Gear
m :20
z :154
xm :0.5
DP :3080
fz norm[kN] :260
fz max[kN] :465
Weight [KGS] :2576

Characteristics

✦ Three independent roller rows – Two axial rows (upper and lower) and one radial row, each with cylindrical rollers for line-contact load distribution.

✦ External gear on outer ring – Gear teeth are integrally machined on the outer ring circumference, featuring a spur tooth profile with induction-hardened flanks.

✦ One-piece inner ring – The inner ring is manufactured as a single forging, containing both axial raceways and the radial raceway in a monolithic structure.

✦ Raceway hardness – All raceways are induction-hardened to 58–62 HRC with a case depth of 4–5 mm for extended wear resistance.

✦ High-section ring geometry – Outer ring features a heightened cross-section with a width-to-height ratio of 1:1.5, optimizing resistance to tilting moments.

✦ Roller retention system – Rollers in each row are guided by segmented cages made from brass or polyamide, depending on operating temperature requirements.


Features

✦ Unmatched load capacity – Three independent roller rows handle extreme axial, radial, and moment loads in the most demanding applications.

✦ Superior shock resistance – Cylindrical roller line contact absorbs heavy impacts without permanent deformation, protecting adjacent components.

✦ Reduced downtime – The modular design allows quick inspection and partial replacement of roller rows without complete bearing removal.

✦ Smooth heavy-load rotation – Optimized cage geometry reduces roller skewing, ensuring consistent rotation even under variable loads.

✦ Long-life raceways – Deep-case hardening extends surface fatigue life, reducing the frequency of raceway reconditioning.


Further Reading