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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 JLM104942A - JLM104910  
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Part Number JLM104942A - JLM104910, 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
LM104900

Cone Part Number
JLM104942A

Cup Part Number
JLM104910

Design Unit
Metric

Cage Material
Stamped Steel


Dimensions

d - Bore
48.600 mm
1.9134 in

D - Cup Outer Diameter
82.000 mm
3.2283 in

B - Cone Width
21.500 mm
0.8465 in

C - Cup Width
17.000 mm
0.6693 in

T - Bearing Width
21.500 mm
0.8465 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.4 mm
0.015 in

r - Cup Backface "To Clear" Radius2
0.51 mm
0.020 in

da - Cone Frontface Backing Diameter
55 mm
2.17 in

db - Cone Backface Backing Diameter
54 mm
2.13 in

Da - Cup Frontface Backing Diameter
78.00 mm
3.11 in

Db - Cup Backface Backing Diameter
75.95 mm
2.99 in

Ab - Cage-Cone Frontface Clearance
2.8 mm
0.11 in

Aa - Cage-Cone Backface Clearance
0.3 mm
0.01 in

a - Effective Center Location3
-5.3 mm
-0.21 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
25000 N
5610 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
96300 N
21700 lbf

C0 - Static Radial Rating
104000 N
23400 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
13000 N
2930 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
1.91

e - ISO Factor2
0.31

Y - ISO Factor3
1.97

G1 - Heat Generation Factor (Roller-Raceway)
38.8

G2 - Heat Generation Factor (Rib-Roller End)
23.2

Cg - Geometry Factor4
0.0801
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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