Additional Info: Timken - hub, bearing and seal category leader. Since Henry Timken patented a tapered roller bearing in 1898, the Timken company has been recognized as a worldwide leader in the manufacturing of highly engineered bearings. Timken also has an impressive history of designing related friction management products, which are made in some of the world's most advanced manufacturing facilities. Our extensive global manufacturing network and research capabilities provide a solid foundation for continued product innovation. By choosing Timken, you are working with a manufacturer that is designing tomorrow's products and applications today. Timken is a primary supplier to original equipment manufacturers. The same consistent quality and dimensional characteristics of Timken products are preferred by professional installers. These factors help ensure proper product installation, minimize repair time, reduce comebacks and warranty claims, and therefore maximize performance.; Timken, the brand you can trust; Manufactured to OE specifications, ready to install; Made in the USA; Engineered for optimum performance and durability 1. UPC: 053893246673 2. Cone / Cup Material: Steel 3. Cone / Cup Outside Diameter (in): 2.047 IN 4. Cone / Cup Width (in): 0.64 IN 5. Internet Product Code (IPC): 83E7F7F531E 6. Item has MSDS (SDS)?: N 7. Manufacturer Warranty: Warranty established by retailer 8. MFG Brand Name: Timken 9. MFG Model # (Series): 30304 10. MFG Name: Timken 11. Package Contents: Cone and Cup 12. Quantity per Application: 2 13. Supplier Company Name: Timken Specifications Series: 30304 Cone Part Number: X30304 Cup Part Number: Y30304 Design Units: METRIC Bearing Weight: 0.20 Kg/0.4 lb Cage Type: Stamped Steel Dimensions d - Bore: 20.000 mm/0.7874 in D - Cup Outer Diameter: 52.000 mm/2.0472 in B - Cone Width: 15.000 mm/0.5906 in C - Cup Width: 13.000 mm/0.5118 in T - Bearing Width: 16.250 mm/0.6398 in Abutment and Fillet Dimensions R - Cone Backface "To Clear" Radius1: 1.520 mm/0.06 in r - Cup Backface "To Clear" Radius2: 1.52 mm/0.06 in da - Cone Frontface Backing Diameter: 24.38 mm/0.96 in db - Cone Backface Backing Diameter: 26.92 mm/1.06 in Da - Cup Frontface Backing Diameter: 48.01 mm/1.89 in Db - Cup Backface Backing Diameter: 45.47 mm/1.79 in Ab - Cage-Cone Frontface Clearance: 3.3 mm/0.13 in Aa - Cage-Cone Backface Clearance: -1 mm/-0.04 in a - Effective Center Location3: -4.8 mm/-0.19 in Basic Load Ratings C90 - Dynamic Radial Rating (90 million revolutions)4: 9980 N/2240 lbf C1 - Dynamic Radial Rating (1 million revolutions)5: 38500 N/8660 lbf C0 - Static Radial Rating: 34500 N/7760 lbf Ca90 - Dynamic Thrust Rating (90 million revolutions)6: 5130 N/1150 lbf Factors K - Factor7: 1.95 e - ISO Factor8: 0.3 Y - ISO Factor9: 2 G1 - Heat Generation Factor (Roller-Raceway): 7.5 G2 - Heat Generation Factor (Rib-Roller End): 5.5 Cg - Geometry Factor10: 0.0458 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 Ca90 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 Ca90 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 Geometry constant for Lubrication Life Adjustment Factor a3l.