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Technical Specification 
The 25577/25523 tapered roller bearing is designed for durability and long service life in heavy-duty trucks, trailers, and agricultural machinery. With its inch-series geometry, it delivers stable radial and axial load support under demanding conditions. Precision-ground raceways minimize friction, while the separable parts simplify installation and replacement. Manufactured with DSBR’s advanced processes and strict quality inspections, this bearing ensures consistent performance and broad compatibility. It is widely used by OEMs and aftermarket distributors, making it a reliable and cost-effective choice for global applications.
Technical Specification 
| Specifications | |
| Series | 25500 |
| Cone Part Number | 25577 |
| Cup Part Number | 25523 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Dimensions | |
| d - Bore | 1.6880 in 42.875 mm |
| D - Cup Outer Diameter | 3.2650 in 82.931 mm |
| B - Cone Width | 1.0000 in 25.400 mm |
| C - Cup Width | 0.8750 in 22.225 mm |
| T - Bearing Width | 1.0625 in 26.988 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.14 in 3.600 mm |
| r - Cup Backface "To Clear" Radius2 | 0.090 in 2.29 mm |
| da - Cone Frontface Backing Diameter | 1.93 in 49 mm |
| db - Cone Backface Backing Diameter | 2.17 in 55 mm |
| Da - Cup Frontface Backing Diameter | 3.05 in 77.00 mm |
| Db - Cup Backface Backing Diameter | 2.83 in 71.88 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 |
