91-321255/1-06145

932 Series 91 type bearing
  • 932 Series 91 type bearing
  • 932 Series 91 type bearing
  • 932 Series 91 type bearing
  • 932 Series 91 type bearing

91-321255/1-06145-932 Series 91 type bearing

The external gear with inner flange slewing bearing is a versatile rotational component designed for applications where compact mounting, straightforward installation, and efficient drive integration are essential. This configuration combines an external gear on the outer ring with an integral inner flange on the inner ring, offering a practical solution for equipment requiring a stable, low-profile mounting interface alongside direct pinion drive capability.



Application Areas:

Compact crane turntables and lifting equipment

Aerial work platforms and access equipment

Solar tracking systems with space constraints

Light to medium-duty industrial turntables

Packaging and handling machinery




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

932 Series 91 type bearing
Type :91-321255/1-06145
Brand :LYMC
Drawing No. :Drawing 3
Dimensions And Weight
Outside Dia Outer Ring
Da [mm] :1398
Inside Diameter,Inner ring
diz [mm] :1105
Inside Dia Outer Ring
Diz [mm] :1255
Outside Diameter Inner Ring
da [mm] :1255
Diameter Inner Ring
b [mm] :1193
Weight
G [kg] :216
Mounting Holes
Pitch Arde Diameter Outer Ring
La [mm] :1316
Number Of Holes Outer Ring
na :42
Pitch Arde Diameter Inner Ring
Li [mm] :1145
Number Of Holes Inner Ring
ni :42
Gearing And Tooth Forces
Pitch Arde Diameter
do [mm] :1380
Module
M :10
Number Of Teeth
Z :138
Permissible Tooth Force
fz norm [kN] :43
Maximum Permissible Tooth Force
fzmax [kN] :76
Load Ratings
Static Dynamic
Co rad [kN] :1353
Co ax [kN] :3619
Crad [kN] :456
Cax [kN] :531

Characteristics

✦ Bearing type – Single-row ball slewing ring with external gear teeth on outer ring and integral flange on inner ring.

✦ Gear specification – External gear with 20° pressure angle, available in module sizes from 3 to 10.

✦ Flange configuration – Inner ring flange includes both threaded and through-hole options for versatile attachment.

✦ Raceway design – Single-arc raceway with optimized ball contact angle for balanced load distribution.

✦ Heat treatment – Raceways are induction hardened to 55–58 HRC with a minimum case depth of 2.5 mm.

✦ Sealing arrangement – Labyrinth seals combined with rubber lip seals for enhanced protection.


Features

✦ Reduces assembly height – The flange design allows the bearing to be mounted directly to the machine frame, lowering the overall profile.

✦ Simplifies gearbox integration – External teeth mesh directly with standard pinions, eliminating intermediate gears.

✦ Enhances corrosion resistance – Optional zinc phosphate coating provides protection in humid or coastal environments.

✦ Supports heavy intermittent loads – The single-arc raceway handles peak loads during start-stop cycles.

✦ Improves seal longevity – The labyrinth-rubber seal combination reduces wear from abrasive particles.

✦ Allows flexible bolt selection – Threaded and through-hole options accommodate both metric and inch fasteners.


Further Reading