The Timken Company - Tapered Roller Bearings - TS (Tapered Single) Imperial

Smarter Bearing Selection Is Here

The Timken ^® Syber ^® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

Learn More

Analyze Bearing Performance in an Application with Timken ^® Syber ^® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

Learn More

Save Time and Design with Confidence.
Register Today for Timken's Online Engineering Tools Webinar.

Batch CAD Cart (0) ▾

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.

Request Information Advanced Search Add to CAD Cart

Unit of Measure

Items	A2031 - A2126 Tapered Roller Bearings - TS (Tapered Single) Imperial	A2031 - A2127 Tapered Roller Bearings - TS (Tapered Single) Imperial	A2037 - A2126 Tapered Roller Bearings - TS (Tapered Single) Imperial	A2037 - A2127 Tapered Roller Bearings - TS (Tapered Single) Imperial	A4044 - A4138 Tapered Roller Bearings - TS (Tapered Single) Imperial
Series	N/A A2000	N/A A2000	N/A A2000	N/A A2000	N/A A4000
Cone Part Number	N/A A2031	N/A A2031	N/A A2037	N/A A2037	N/A A4044
Cup Part Number	N/A A2126	N/A A2127	N/A A2126	N/A A2127	N/A A4138
d - Bore	N/A 0.3125 in7.938 mm	N/A 0.3125 in7.938 mm	N/A 0.3750 in9.525 mm	N/A 0.3750 in9.525 mm	N/A 0.4375 in11.113 mm
D - Cup Outer Diameter	N/A 1.2595 in31.991 mm	N/A 1.2595 in31.991 mm	N/A 1.2595 in31.991 mm	N/A 1.2595 in31.991 mm	N/A 1.3775 in34.989 mm
B - Cone Width	N/A 0.4246 in10.785 mm	N/A 0.4246 in10.785 mm	N/A 0.4246 in10.785 mm	N/A 0.4246 in10.785 mm	N/A 0.4326 in10.988 mm
C - Cup Width	N/A 0.3125 in7.938 mm	N/A 0.3755 in9.538 mm	N/A 0.3125 in7.938 mm	N/A 0.3755 in9.538 mm	N/A 0.3437 in8.730 mm
Design Unit	N/A Inch
T - Bearing Width	N/A 0.3940 in10.008 mm	N/A 0.4161 in10.569 mm	N/A 0.3940 in10.008 mm	N/A 0.4161 in10.569 mm	N/A 0.4330 in10.998 mm
R - Cone Backface "To Clear" Radius¹	N/A 0.02 in0.50 mm	N/A 0.02 in0.50 mm	N/A 0.050 in1.300 mm	N/A 0.050 in1.300 mm	N/A 0.050 in1.300 mm
r - Cup Backface "To Clear" Radius²	N/A 0.050 in1.27 mm
da - Cone Frontface Backing Diameter	N/A 0.49 in12.5 mm	N/A 0.49 in12.5 mm	N/A 0.53 in13.5 mm	N/A 0.53 in13.5 mm	N/A 0.61 in15.5 mm
db - Cone Backface Backing Diameter	N/A 0.51 in13 mm	N/A 0.51 in13 mm	N/A 0.59 in15 mm	N/A 0.59 in15 mm	N/A 0.69 in17.5 mm
Da - Cup Frontface Backing Diameter	N/A 1.18 in30.00 mm	N/A 1.14 in28.96 mm	N/A 1.18 in30.00 mm	N/A 1.14 in28.96 mm	N/A 1.28 in32.51 mm
Db - Cup Backface Backing Diameter	N/A 1.02 in25.91 mm	N/A 1.02 in25.91 mm	N/A 1.02 in25.91 mm	N/A 1.02 in25.91 mm	N/A 1.14 in28.96 mm
Ab - Cage-Cone Frontface Clearance	N/A 0.09 in2.3 mm	N/A 0.09 in2.3 mm	N/A 0.09 in2.3 mm	N/A 0.09 in2.3 mm	N/A 0.07 in1.8 mm
Aa - Cage-Cone Backface Clearance	N/A -0.03 in-0.8 mm	N/A -0.03 in-0.8 mm	N/A -0.03 in-0.8 mm	N/A -0.03 in-0.8 mm	N/A 0 in0 mm
a - Effective Center Location³	N/A -0.12 in-3 mm	N/A -0.12 in-3 mm	N/A -0.12 in-3 mm	N/A -0.12 in-3 mm	N/A -0.1 in-2.5 mm
C90 - Dynamic Radial Rating (90 million revolutions)⁴	N/A 630 lbf2800 N	N/A 630 lbf2800 N	N/A 630 lbf2800 N	N/A 630 lbf2800 N	N/A 767 lbf3410 N
C1 - Dynamic Radial Rating (1 million revolutions)⁵	N/A 2430 lbf10800 N	N/A 2430 lbf10800 N	N/A 2430 lbf10800 N	N/A 2430 lbf10800 N	N/A 2960 lbf13200 N
C0 - Static Radial Rating	N/A 2070 lbf9230 N	N/A 2070 lbf9230 N	N/A 2070 lbf9230 N	N/A 2070 lbf9230 N	N/A 2580 lbf11500 N
C_a90 - Dynamic Thrust Rating (90 million revolutions)⁶	N/A 437 lbf1940 N	N/A 437 lbf1940 N	N/A 437 lbf1940 N	N/A 437 lbf1940 N	N/A 594 lbf2640 N
K - Factor⁷	N/A 1.44	N/A 1.44	N/A 1.44	N/A 1.44	N/A 1.29
e - ISO Factor⁸	N/A 0.41	N/A 0.41	N/A 0.41	N/A 0.41	N/A 0.45
Y - ISO Factor⁹	N/A 1.48	N/A 1.48	N/A 1.48	N/A 1.48	N/A 1.32
G1 - Heat Generation Factor (Roller-Raceway)	N/A 1.7	N/A 1.7	N/A 1.7	N/A 1.7	N/A 2.3
G2 - Heat Generation Factor (Rib-Roller End)	N/A 3.2	N/A 3.2	N/A 3.2	N/A 3.2	N/A 4.12
Cg - Geometry Factor¹⁰	N/A 0.0308	N/A 0.0308	N/A 0.0308	N/A 0.0308	N/A 0.0355
Bearing Weight	N/A 0.1 lb0.000 Kg	N/A 0.1 lb0.000 Kg	N/A 0.1 lb0.000 Kg	N/A 0.1 lb0.000 Kg	N/A 0.1 lb0.10 Kg
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 C_a90 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 C_a90 are radial and thrust values for a single-row, C₉₀₍₂₎ is the two-row radial value. ⁷ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. 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 Geometry constant for Lubrication Life Adjustment Factor a3l.