The Timken Company - Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial

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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.

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Unit of Measure

Items	LM11949 - LM11910 (LM11900EA) Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial	LM11949 - LM11910 (LM11900LA) Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial	M12649 - M12610 (M12600LA) Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial	07100 - 07196 (07000LA) Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial	L44642 - L44610 (L44600LC) Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial
Series	N/A LM11900	N/A LM11900	N/A M12600	N/A 07000	N/A L44600
Cone Part Number	N/A LM11949	N/A LM11949	N/A M12649	N/A 07100	N/A L44642
Cup Part Number	N/A LM11910	N/A LM11910	N/A M12610	N/A 07196	N/A L44610
Seal Part Number	N/A LM11900EA	N/A LM11900LA	N/A M12600LA	N/A 07000LA	N/A L44600LC
d - Bore	N/A 3/4 in19.05 mm	N/A 3/4 in19.05 mm	N/A 0.8437 in21.430 mm	N/A 1 in25.40 mm	N/A 1 in25.40 mm
D - Cup Outer Diameter	N/A 1.7810 in45.237 mm	N/A 1.7810 in45.237 mm	N/A 1.9687 in50.005 mm	N/A 1.9687 in50.005 mm	N/A 1.9800 in50.292 mm
B - Cone Width	N/A 0.6550 in16.637 mm	N/A 0.6550 in16.637 mm	N/A 0.7200 in18.288 mm	N/A 0.5614 in14.260 mm	N/A 0.5800 in14.732 mm
C - Cup Width	N/A 0.4750 in12.065 mm	N/A 0.4750 in12.065 mm	N/A 0.5500 in13.970 mm	N/A 0.3750 in9.525 mm	N/A 0.4200 in10.668 mm
Design Unit	N/A Inch
T - Bearing Width	N/A 0.6100 in15.494 mm	N/A 0.6100 in16.281 mm	N/A 0.69 in17.526 mm	N/A 0.5313 in13.495 mm	N/A 0.5600 in14.224 mm
T1 - Total Width	N/A 0.641 in16.281 mm	N/A 0.685 in17.4 mm	N/A 0.765 in19.43 mm	N/A 0.606 in15.4 mm	N/A 0.588 in14.935 mm
R - Cone Backface "To Clear" Radius¹	N/A 0.050 in1.270 mm	N/A 0.050 in1.270 mm	N/A 0.050 in1.270 mm	N/A 0.040 in1 mm	N/A 0.14 in3.560 mm
r - Cup Backface "To Clear" Radius²	N/A 0.050 in1.27 mm	N/A 0.050 in1.27 mm	N/A 0.050 in1.27 mm	N/A 0.04 in1.02 mm	N/A 0.050 in1.27 mm
da - Cone Frontface Backing Diameter	N/A 0.93 in23.5 mm	N/A 0.93 in23.5 mm	N/A 1.08 in27.5 mm	N/A 1.16 in29.5 mm	N/A 1.16 in29.5 mm
db - Cone Backface Backing Diameter	N/A 0.98 in25 mm	N/A 0.98 in25 mm	N/A 1.16 in29.5 mm	N/A 1.2 in30.5 mm	N/A 1.42 in36 mm
Da - Cup Frontface Backing Diameter	N/A 1.65 in41.90 mm	N/A 1.65 in41.90 mm	N/A 1.83 in46.48 mm	N/A 1.87 in47.50 mm	N/A 1.87 in47.50 mm
Db - Cup Backface Backing Diameter	N/A 1.56 in39.62 mm	N/A 1.56 in39.62 mm	N/A 1.73 in43.94 mm	N/A 1.75 in44.45 mm	N/A 1.75 in44.45 mm
Ab - Cage-Cone Frontface Clearance	N/A 0.05 in1.3 mm	N/A 0.05 in1.3 mm	N/A 0.07 in1.8 mm	N/A 0.08 in2 mm	N/A 0.05 in1.3 mm
Aa - Cage-Cone Backface Clearance	N/A -0.01 in-0.3 mm	N/A -0.01 in-0.3 mm	N/A -0.01 in-0.3 mm	N/A 0 in0 mm	N/A 0.02 in0.5 mm
a - Effective Center Location³	N/A -0.22 in-5.6 mm	N/A -0.22 in-5.6 mm	N/A -0.25 in-6.4 mm	N/A -0.11 in-2.8 mm	N/A -0.13 in-3.3 mm
C90 - Dynamic Radial Rating (90 million revolutions)⁴	N/A 2280 lbf10100 N	N/A 2280 lbf10100 N	N/A 3040 lbf13500 N	N/A 1700 lbf7550 N	N/A 2080 lbf9230 N
C1 - Dynamic Radial Rating (1 million revolutions)⁵	N/A 8800 lbf39100 N	N/A 8800 lbf39100 N	N/A 11700 lbf52200 N	N/A 6540 lbf29100 N	N/A 8010 lbf35600 N
C0 - Static Radial Rating	N/A 7200 lbf32000 N	N/A 7200 lbf32000 N	N/A 9780 lbf43500 N	N/A 6650 lbf29600 N	N/A 7400 lbf32900 N
C_a90 - Dynamic Thrust Rating (90 million revolutions)⁶	N/A 1170 lbf5220 N	N/A 1170 lbf5220 N	N/A 1450 lbf6440 N	N/A 1170 lbf5190 N	N/A 1330 lbf5910 N
K - Factor⁷	N/A 1.94	N/A 1.94	N/A 2.1	N/A 1.45	N/A 1.56
e - ISO Factor⁸	N/A 0.3	N/A 0.3	N/A 0.28	N/A 0.4	N/A 0.37
Y - ISO Factor⁹	N/A 2	N/A 2	N/A 2.16	N/A 1.49	N/A 1.6
Y1 - ISO Factor¹⁰	N/A 2.25	N/A 2.25	N/A 2.43	N/A 1.68	N/A 1.8
Y2 - ISO Factor¹¹	N/A 3.34	N/A 3.34	N/A 3.61	N/A 2.5	N/A 2.69
G1 - Heat Generation Factor (Roller-Raceway)	N/A 6.6	N/A 6.6	N/A 9.1	N/A 7.6	N/A 8.9
G2 - Heat Generation Factor (Rib-Roller End)	N/A 5.49	N/A 5.49	N/A 5.63	N/A 7.1	N/A 8.9
Cg - Geometry Factor¹²	N/A 0.0441	N/A 0.0441	N/A 0.0479	N/A 0.0509	N/A 0.0526
Bearing Weight	N/A 0.280 lb0.12 Kg	N/A 0.280 lb0.12 Kg	N/A 0.370 lb0.17 Kg	N/A 0.25 lb0.11 Kg	N/A 0.27 lb0.13 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 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.