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Technical Specification 
The 25590/25520 tapered roller bearing is a heavy-duty inch-series model widely used in trucks, trailers, and agricultural equipment. It provides strong support for both axial and radial loads, ensuring long-lasting durability in demanding working conditions. Built from high-grade steel with precision machining, this bearing minimizes friction, enhances efficiency, and extends service life. Its separable cup and cone design facilitates quick maintenance and reduces downtime. DSBR’s strict manufacturing quality control ensures consistency, making it a trusted choice for OEMs and aftermarket distributors worldwide.
Technical Specification 
| Specifications | |
| Series | 25500 |
| Cone Part Number | 25590 |
| Cup Part Number | 25520 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Dimensions | |
| d - Bore | 1.7960 in 45.618 mm |
| D - Cup Outer Diameter | 3.2650 in 82.931 mm |
| B - Cone Width | 1.0000 in 25.400 mm |
| C - Cup Width | 0.7500 in 19.050 mm |
| T - Bearing Width | 0.9375 in 23.813 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.14 in 3.600 mm |
| r - Cup Backface "To Clear" Radius2 | 0.030 in 0.76 mm |
| da - Cone Frontface Backing Diameter | 2.01 in 51 mm |
| db - Cone Backface Backing Diameter | 2.28 in 58 mm |
| Da - Cup Frontface Backing Diameter | 3.05 in 77.00 mm |
| Db - Cup Backface Backing Diameter | 2.91 in 73.91 mm |
| Ab - Cage-Cone Frontface Clearance | 0.06 in 1.5 mm |
| Aa - Cage-Cone Backface Clearance | 0.01 in 0.3 mm |
| a - Effective Center Location3 | -0.25 in -6.4 mm |
| Basic Load Ratings | |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 5270 lbf 23500 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 20300 lbf 90500 N |
| C0 - Static Radial Rating | 24900 lbf 111000 N |
| Ca90- Dynamic Thrust Rating (90 million revolutions)6 | 3020 lbf 13500 N |
| Factors | |
| K - Factor7 | 1.74 |
| e - ISO Factor8 | 0.33 |
| Y - ISO Factor9 | 1.79 |
| G1 - Heat Generation Factor (Roller-Raceway) | 35.2 |
| G2 - Heat Generation Factor (Rib-Roller End) | 14.3 |
| Cg - Geometry Factor10 | 0.0801 |
