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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Metric > Part Number 31310  
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Part Number 31310, Tapered Roller Bearings - TS (Tapered Single) Metric


This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.



Unit of Measure: Imperial Metric Both

Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
31310M

Cone Part Number
X31310M

Cup Part Number
Y31310M

Design Unit
Metric

Cage Material
Stamped Steel


Dimensions

d - Bore
50 mm
1.9685 in

D - Cup Outer Diameter
110 mm
4.3307 in

B - Cone Width
27.000 mm
1.0630 in

C - Cup Width
19.000 mm
0.7480 in

T - Bearing Width
29.250 mm
1.1516 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
2.540 mm
0.1 in

r - Cup Backface "To Clear" Radius2
2.03 mm
0.08 in

da - Cone Frontface Backing Diameter
63 mm
2.48 in

db - Cone Backface Backing Diameter
75 mm
2.95 in

Da - Cup Frontface Backing Diameter
104.40 mm
4.12 in

Db - Cup Backface Backing Diameter
92.96 mm
3.66 in

Ab - Cage-Cone Frontface Clearance
4.6 mm
0.18 in

Aa - Cage-Cone Backface Clearance
4.3 mm
0.17 in

a - Effective Center Location3
5.6 mm
0.22 in
1 These maximum fillet radii will be cleared by the bearing corners.
2 These maximum fillet radii will be cleared by the bearing corners.
3 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
38200 N
8590 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
147000 N
33100 lbf

C0 - Static Radial Rating
132000 N
29700 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
54000 N
12100 lbf
1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
3 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.


Factors

K - Factor1
0.71

e - ISO Factor2
0.83

Y - ISO Factor3
0.73

G1 - Heat Generation Factor (Roller-Raceway)
37.1

G2 - Heat Generation Factor (Rib-Roller End)
14.7

Cg - Geometry Factor4
0.069
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 Geometry constant for Lubrication Life Adjustment Factor a3l.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances


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