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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 JLM820048 - JLM820012  
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Part Number JLM820048 - JLM820012, 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
LM820000

Cone Part Number
JLM820048

Cup Part Number
JLM820012

Design Unit
Metric

Cage Material
Stamped Steel

Related Assembly Number(s)
JLM820048-90A01
JLM820048-90B01


Dimensions

d - Bore
100 mm
3.937 in

D - Cup Outer Diameter
150 mm
5.9055 in

B - Cone Width
30.000 mm
1.1811 in

C - Cup Width
26.000 mm
1.0236 in

T - Bearing Width
32.000 mm
1.2598 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
2.290 mm
0.09 in

r - Cup Backface "To Clear" Radius2
2.29 mm
0.090 in

da - Cone Frontface Backing Diameter
107 mm
4.21 in

db - Cone Backface Backing Diameter
111 mm
4.37 in

Da - Cup Frontface Backing Diameter
145.03 mm
5.71 in

Db - Cup Backface Backing Diameter
134.87 mm
5.31 in

Ab - Cage-Cone Frontface Clearance
1.8 mm
0.07 in

Aa - Cage-Cone Backface Clearance
1.8 mm
0.07 in

a - Effective Center Location3
4.6 mm
0.18 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
42100 N
9470 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
162000 N
36500 lbf

C0 - Static Radial Rating
242000 N
54400 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
36200 N
8130 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
1.16

e - ISO Factor2
0.5

Y - ISO Factor3
1.2

G1 - Heat Generation Factor (Roller-Raceway)
133

G2 - Heat Generation Factor (Rib-Roller End)
38.3

Cg - Geometry Factor4
0.141
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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