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

387AS / 384D N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387A-90178 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387W / 384DC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387A / 384DC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387 / 384DC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387AS / 384DC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-S / 384DC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387S-99402 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387AS-90073 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-90110 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387W / 384ED N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387A-90070 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387A / 384EDC N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387W / 384XD N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 3.7640 in95.606 mm N/A 4.1389 in105.128 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387 / 384XD N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 3.7640 in95.606 mm N/A 4.1389 in105.128 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387AS / 384XD N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 3.7640 in95.606 mm N/A 4.1389 in105.128 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387S-90229 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-90052 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-90054 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-90122 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387-90301 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387A-90271 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.6875 in42.863 mm N/A 2.0624 in52.385 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387S-90158 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387S-902B6 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
387S-90317 N/A 2.2500 in57.150 mm N/A 3.9370 in100.000 mm N/A 1.562 in39.675 mm N/A 1.9369 in49.197 mm N/A 0.864 in21.946 mm N/A 42200 lbf188000 N N/A 6280 lbf28000 N N/A 385 N/A
Unit of Measure
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