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.
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.
Alex Waye, Timken Application Engineer, shows you how to instantly compute tangential, radial, and axial forces for better design decisions.
                            Part Number | 
                        
                            Series | 
                        
                            d - Bore | 
                        
                            D - Cup Outer Diameter | 
                        
                            B - Cone Width | 
                        
                            C - Double Cup Width | 
                        
                            T - Bearing Width across Cones | 
                        
                            C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) | 
                        
                            C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) | 
                        
                            CAD | 
                                                        
|---|---|---|---|---|---|---|---|---|---|
| 387AS - 384DC | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 387-S - 384DC | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385 - 384DC | Series N/A 385 | d - Bore N/A 2.1654 in55.001 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389A - 384DC | Series N/A 385 | d - Bore N/A 2.1250 in53.975 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389AS - 384DC | Series N/A 385 | d - Bore N/A 2.1250 in53.975 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385AX - 384DC | Series N/A 385 | d - Bore N/A 2 in50.80 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 386AX - 384DC | Series N/A 385 | d - Bore N/A 1 7/8 in47.625 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 5300 lbf23600 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 35600 lbf158000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389 - 384DC | Series N/A 385 | d - Bore N/A 2.1880 in55.575 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.6875 in42.863 mm | T - Bearing Width across Cones N/A 2.0624 in52.385 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385 - 384DRB | Series N/A 385 | d - Bore N/A 2.1654 in55.001 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389 - 384DRB | Series N/A 385 | d - Bore N/A 2.1880 in55.575 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 386AX - 384DRB | Series N/A 385 | d - Bore N/A 1 7/8 in47.625 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 5300 lbf23600 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 35600 lbf158000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 387 - 384DRB | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 388A - 384DRB | Series N/A 385 | d - Bore N/A 2.2650 in57.531 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385X - 384DRB | Series N/A 385 | d - Bore N/A 2.1654 in55.001 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 387AS - 384DRB | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385A - 384DRB | Series N/A 385 | d - Bore N/A 2 in50.80 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389AS - 384DRB | Series N/A 385 | d - Bore N/A 2.1250 in53.975 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 387A - 384DRB | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 386 - 384DRB | Series N/A 385 | d - Bore N/A 2.1840 in55.474 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 5300 lbf23600 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 35600 lbf158000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 386A - 384DRB | Series N/A 385 | d - Bore N/A 1 7/8 in47.625 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 387W - 384DRB | Series N/A 385 | d - Bore N/A 2 1/4 in57.15 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 389A - 384DRB | Series N/A 385 | d - Bore N/A 2.1250 in53.975 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385AS - 384DRB | Series N/A 385 | d - Bore N/A 2 in50.80 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 5300 lbf23600 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 35600 lbf158000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385AX - 384DRB | Series N/A 385 | d - Bore N/A 2 in50.80 mm | D - Cup Outer Diameter N/A 4.1250 in104.775 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 6280 lbf28000 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 42200 lbf188000 N | 
                                    
                                        CAD                                                    
 N/A                                                         | 
                                                                    
| 385AS - 384ED | Series N/A 385 | d - Bore N/A 2 in50.80 mm | D - Cup Outer Diameter N/A 3.937 in100 mm | B - Cone Width N/A 0.8640 in21.946 mm | C - Double Cup Width N/A 1.5620 in39.675 mm | T - Bearing Width across Cones N/A 1.9369 in49.197 mm | C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) N/A 5300 lbf23600 N | C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions) N/A 35600 lbf158000 N | 
                                    
                                        CAD                                                    
 N/A                                                         |