31305/DF

Two matched single row bearings with face-to-face arrangement of tapered roller bearings

The two matched single row bearings with face-to-face arrangement (X arrangement) are based on single row tapered roller bearings of popular dimensions. Their roller rows are arranged face-to-face (load lines converge towards the bearing axis) and can withstand tilting moments and axial loads in both directions to achieve a certain bearing stiffness. They are commonly used in the mining industry in gearboxes, lifting equipment, mills and machines such as tunnel boring machines.

  • High radial load carrying capacity
  • Designed to withstand bi-directional axial loads
  • Can withstand tilting moments
  • Relatively high stiffness
  • With intermediate outer ring spacer

+86 13817962999

Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter25.0mm
Outer Diameter62.0mm
Total width36.5mm
Inner ring width34.0mm
Outer ring width36.5mm
Contact angle28.811°

Performance

Basic dynamic load rating79.9kN
Basic static load rating80.0kN
Reference speed6700.0r/min
Limiting speed11000.0r/min
JOJI Performance Class JOJI

Properties of the JOJI

Bearing parts Complete set of bearings
Number of columns 2
Locating features, bearing outer ring None
Hole type Cylindrical bore
Cage Steel plate
Mating Configuration Face to Face (X)
Number of bearings in the kit 2
Coated Without
Seal without
Lubricant without
Relubrication with

Logistics

Net weight0.56kg
eClass Code 23-05-09-10

Technical Parameters

Technical Parameters

Size

d25.0mm Hole diameter
D62.0mm Outer diameter
T36.5mm Total width
2B34.0mm Inner ring width
b5.0mm Lubrication groove width
K4.0mm Lubrication hole diameter
r3,4 min.1.5mm Chamfer size
r5 min.0.6mm Chamfer size

Shoulder size

da max.34.0mm Shaft shoulder diameter
Da min.47.0mm Bearing housing shoulder diameter
Da max.55.0mm Bearing seat shoulder diameter
Ca min.3.0mm Minimum width of space required in the housing on the large end face
ra max.1.5mm Radius of rounded corners
rc max.0.6mm Corner radius

Data Calculation

JOJI Performance Class JOJI
Basic dynamic load rating C79.9kN
Basic static load ratingC080.0kN
Fatigue Load LimitPu8.65kN
Reference speed6700.0r/min
Limit speed11000.0r/min
Limit value e0.83
Calculation coefficientY10.81
Calculation factorY21.2
Calculation factorY00.8

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