The Timken Company - Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)

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Items	A4059 - A4138 (X5SA4059 - K524667R) Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)	LM11749 - LM11710 (K106398R - K106397R) Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)	LM11949 - LM11910 (K107061R - K107087R) Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)	L44643 - L44610 (K106790R - K106789R) Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)	15578 - 15520 (X1S-15578 - K158879R) Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)
Cone Part Number	N/A A4059	N/A LM11749	N/A LM11949	N/A L44643	N/A 15578
Cup Part Number	N/A A4138	N/A LM11710	N/A LM11910	N/A L44610	N/A 15520
Full Timken Part Number	N/A
Inner Spacer Part Number	N/A X5SA4059	N/A K106398R	N/A K107061R	N/A K106790R	N/A X1S-15578
Outer Spacer Part Number	N/A K524667R	N/A K106397R	N/A K107087R	N/A K106789R	N/A K158879R
d - Bore	N/A 0.5901 in14.989 mm	N/A 11/16 in17.463 mm	N/A 3/4 in19.05 mm	N/A 1 in25.400 mm	N/A 1 in25.400 mm
D - Cup Outer Diameter	N/A 1.3775 in34.989 mm	N/A 1.5700 in39.878 mm	N/A 1.7810 in45.237 mm	N/A 1.9800 in50.292 mm	N/A 2.2500 in57.150 mm
T - Width	N/A 0.9660 in24.536 mm	N/A 1.1900 in30.226 mm	N/A 1.5 in38.1 mm	N/A 1.2450 in31.623 mm	N/A 1.5450 in39.243 mm
C - Width	N/A 0.7874 in20.000 mm	N/A 0.9400 in23.876 mm	N/A 1.2300 in31.242 mm	N/A 0.9650 in24.511 mm	N/A 1.2326 in31.308 mm
Snap Ring Diameter	N/A 1.43 in36.35 mm	N/A 1.65 in41.91 mm	N/A 1.84 in46.81 mm	N/A 2.08 in52.78 mm	N/A 2.35 in59.72 mm
Snap Ring Width	N/A 0.10 in2.54 mm	N/A 0.10 in2.54 mm	N/A 0.28 in7.11 mm	N/A 0.13 in3.18 mm	N/A 0.17 in0.34 mm
R - Cone Backface "To Clear" Radius¹	N/A 0.03 in0.800 mm	N/A 0.050 in1.270 mm	N/A 0.050 in1.270 mm	N/A 0.050 in1.270 mm	N/A 0.050 in1.300 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 0.050 in1.27 mm	N/A 0.06 in1.52 mm
db - Cone Backface Backing Diameter	N/A 0.77 in19.5 mm	N/A 0.94 in24 mm	N/A 0.98 in25 mm	N/A 1.26 in32 mm	N/A 1.28 in32.5 mm
Da - Cup Frontface Backing Diameter	N/A 1.28 in32.51 mm	N/A 1.48 in37.59 mm	N/A 1.65 in41.90 mm	N/A 1.87 in47.50 mm	N/A 2.11 in53.10 mm
C90 - Dynamic Radial Rating (90 million revolutions)	N/A 767 lbf3410 N	N/A 1710 lbf7610 N	N/A 2280 lbf10100 N	N/A 2080 lbf9230 N	N/A 3180 lbf14100 N
C1 - Dynamic Radial Rating (1 million revolutions)³	N/A 5150 lbf22900 N	N/A 11500 lbf51100 N	N/A 15300 lbf68100 N	N/A 13900 lbf62000 N	N/A 21300 lbf94900 N
C_a90 - Dynamic Thrust Rating (90 million revolutions)⁴	N/A 594 lbf2640 N	N/A 838 lbf3730 N	N/A 1170 lbf5220 N	N/A 1330 lbf5910 N	N/A 1880 lbf8380 N
C90₍₂₎ - Dynamic Radial Rating (Two-Row, 90 million revolutions)⁵	N/A 1330 lbf5940 N	N/A 2980 lbf13300 N	N/A 3970 lbf17700 N	N/A 3610 lbf16100 N	N/A 5530 lbf24600 N
K - Factor⁶	N/A 1.29	N/A 2.04	N/A 1.94	N/A 1.56	N/A 1.69
e - ISO Factor⁷	N/A 0.45	N/A 0.29	N/A 0.3	N/A 0.37	N/A 0.35
Y1 - ISO Factor⁸	N/A 1.49	N/A 2.36	N/A 2.25	N/A 1.8	N/A 1.95
Y2 - ISO Factor⁹	N/A 2.22	N/A 3.51	N/A 3.34	N/A 2.69	N/A 2.9
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 Based on 1 x 10⁶ revolutions L₁₀ life, for the ISO life calculation method. 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 for a single-row, C₉₀₍₂₎ is the two-row radial value. ⁵ 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. ⁶ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. 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.