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31318/DFC70

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31318/DFC70

Matched tapered roller bearings arranged face-to-face
Matched tapered roller bearings arranged face-to-face (X-arrangement, load lines diverge towards the bearing axis) accommodate high radial loads and axial loads in both directions. The precision manufactured intermediate ring between the outer rings enables a defined internal clearance or preload to be achieved when mounted. Matched tapered roller bearings are typically used in gearboxes, hoisting equipment, rolling mills, and machines in the mining industry.

  • High radial load carrying capacity
  • Designed for axial loads in both directions
  • Relatively high stiffness
  • Surface finish on the contact surfaces of the rollers and raceways that enhances operational reliability

Description

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Dimensions - 31318/DFC70

Dimensions

d

90 mm

Bore diameter
D

190 mm

Outside diameter
T

93 mm

Total width
2B

86 mm

Width of inner rings
b

15 mm

Width of lubrication groove
K

10 mm

Diameter of lubrication hole
r3,4

min. 3 mm

Chamfer dimension
r5

min. 1 mm

Chamfer dimension

Abutment dimensions - 31318/DFC70

Abutment dimensions

da

max. 110 mm

Diameter of shaft abutment
Da

min. 151 mm

Diameter of housing abutment
Da

max. 177.5 mm

Diameter of housing abutment
Ca

min. 5 mm

Minimum width of space required in housing on large side face
ra

max. 4 mm

Radius of fillet
rc

max. 1 mm

Radius of fillet

Calculation data

Basic dynamic load ratingC

486 kN

Basic static load ratingC0

630 kN

Fatigue load limitPu

71 kN

Reference speed

1 900 r/min

Limiting speed

3 400 r/min

Limiting valuee

0.83

Calculation factorY1

0.81

Calculation factorY2

1.2

Calculation factorY0

0.8

Mass

Mass

11.4 kg

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