The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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Available in single, double, and multi-row configurations as well as proprietary sizes, these bearings are developed in collaboration with OE engineers to deliver premium performance across various applications. Their power-dense designs support heavier loads and help extend bearing life, while optimized internal geometry reduces torque and operating temperatures to prolong lubrication system life. Additionally, they can be engineered with proprietary enhancements to withstand highly corrosive conditions, high temperatures, vacuum environments, or situations with limited lubrication.
Timken_TRB_2ROWASSY_TDO_438-90092-A3
TRB TDO Line Drawing
Unit of Measure
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Part Number

Bore (d)

O.D. (D)

Outer Ring Width (C)

Width (T)

Inner Ring Width (B)

Dynamic Radial Load Rating - 1M Revs (C1) 

Dynamic Radial Load Rating - 90M Revs (C90)

Series

CAD

28985-90098 N/A 2.3750 in60.325 mm N/A 3.9370 in100.000 mm N/A 1.7500 in44.450 mm N/A 2.1874 in55.56 mm N/A 1.0000 in25.400 mm N/A 41500 lbf185000 N N/A 6180 lbf27500 N N/A 28900 N/A
28985-902A2 N/A 2.3750 in60.325 mm N/A 3.9370 in100.000 mm N/A 1.7500 in44.450 mm N/A 2.1874 in55.56 mm N/A 1.0000 in25.400 mm N/A 41500 lbf185000 N N/A 6180 lbf27500 N N/A 28900 N/A
558-99477 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
558A-90036 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
557A / 552D N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
557A / 552DC N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
558 / 552DC N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
558A / 552DC N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
558-90031 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
558-90032 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
558-90034 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
558-90101 N/A 2.3750 in60.325 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 88500 lbf394000 N N/A 13200 lbf58600 N N/A 555 N/A
78238C / 78549D N/A 2.3750 in60.325 mm N/A 5.5 in139.7 mm N/A 2.0395 in51.803 mm N/A 3.0625 in77.788 mm N/A 1.3085 in33.236 mm N/A 92600 lbf412000 N N/A 13800 lbf61300 N N/A 78000C N/A
78238-90074 N/A 2.3750 in60.325 mm N/A 5.5 in139.7 mm N/A 2.0395 in51.803 mm N/A 3.0625 in77.788 mm N/A 1.3085 in33.236 mm N/A 79300 lbf353000 N N/A 11800 lbf52600 N N/A 78000 N/A
78238 / 78551DF N/A 2.3750 in60.325 mm N/A 5.5100 in139.954 mm N/A 2.0395 in51.803 mm N/A 3.0625 in77.788 mm N/A 1.3085 in33.236 mm N/A 79300 lbf353000 N N/A 11800 lbf52600 N N/A 78000 N/A
9275 / 9220D N/A 2.3750 in60.325 mm N/A 6.3750 in161.925 mm N/A 2.781 in70.637 mm N/A 4.0310 in102.387 mm N/A 1.8125 in46.038 mm N/A 116000 lbf518000 N N/A 17300 lbf77100 N N/A 9200 N/A
392-90028 N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
392 / 394DC N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
392A / 394DC N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
392A / 394YD N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
392-902A2 N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
392-90291 N/A 2.4375 in61.913 mm N/A 4.3307 in110.000 mm N/A 1.8125 in46.038 mm N/A 2.0624 in52.385 mm N/A 0.866 in21.996 mm N/A 38700 lbf172000 N N/A 5760 lbf25600 N N/A 395 N/A
554 / 552D N/A 2.4375 in61.913 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
554 / 552DC N/A 2.4375 in61.913 mm N/A 4.8750 in123.825 mm N/A 2.5 in63.5 mm N/A 3.1249 in79.372 mm N/A 1.444 in36.678 mm N/A 74700 lbf332000 N N/A 11100 lbf49400 N N/A 555 N/A
28990-902A1 N/A 2.4400 in61.976 mm N/A 3.9370 in100.000 mm N/A 1.7500 in44.450 mm N/A 2.1250 in53.975 mm N/A 0.9688 in24.608 mm N/A 41500 lbf185000 N N/A 6180 lbf27500 N N/A 28900 N/A
Unit of Measure
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