The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore.
N/AThis part has a non-standard shoulder design. Please email customer CAD for shoulder details to ensure the proper design of mating components.
Dimensions
d - Bore
N/A4 1/2 in114.300 mm
D - Cup Outer Diameter
N/A12.25 in311.15 mm
B - Cone Width
N/A2.6250 in66.675 mm
C - Double Cup Width
N/A6.2500 in158.750 mm
T - Bearing Width across Cones
N/A5.6439 in143.355 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1
N/A0.280 in7.100 mm
r - Cup Backface "To Clear" Radius2
N/A0.130 in3.30 mm
db - Cone Backface Backing Diameter
N/A5.63 in143 mm
Aa - Cage-Cone Backface Clearance
N/A0.16 in4.1 mm
a - Effective Center Location3
N/A-0.74 in-18.8 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4
N/A47000 lbf209000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5
N/A315000 lbf1400000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6
N/A81800 lbf364000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7
N/A26200 lbf116000 N
Factors
K - Factor8
N/A1.79
e - ISO Factor9
N/A0.33
Y1 - ISO Factor10
N/A2.07
Y2 - ISO Factor11
N/A3.09
Cg - Geometry Factor12
N/A0.118
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.
4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
6 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.
7 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.
8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
11 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
12 Geometry constant for Lubrication Life Adjustment Factor a3l.