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Technical Specification 
The HM88649/HM88610 tapered roller bearing is built to withstand demanding conditions in trucks, trailers, and heavy-duty industrial applications. With its inch-series configuration, it provides stable radial and axial load support. Made from premium bearing steel, it features precision-ground raceways for smooth operation and reduced wear. Its separable parts simplify installation, inspection, and servicing. Known for its excellent load-carrying capacity and reliability, this bearing is widely used by OEMs worldwide. DSBR ensures strict quality control and advanced production processes, delivering bearings with outstanding consistency and durability.
Technical Specification 
| Specifications | |
| Series | HM88600 |
| Cone Part Number | HM88649 |
| Cup Part Number | HM88610 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Related Assembly Number(s) | HM88649-90413 |
| Dimensions | |
| d - Bore | 1 3/8 in 34.925 mm |
| D - Cup Outer Diameter | 2.8438 in 72.233 mm |
| B - Cone Width | 1.0000 in 25.400 mm |
| C - Cup Width | 0.7812 in 19.842 mm |
| T - Bearing Width | 1.0000 in 25.400 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.09 in 2.290 mm |
| r - Cup Backface "To Clear" Radius2 | 0.090 in 2.29 mm |
| da - Cone Frontface Backing Diameter | 1.68 in 42.5 mm |
| db - Cone Backface Backing Diameter | 1.91 in 48.5 mm |
| Da - Cup Frontface Backing Diameter | 2.74 in 69.10 mm |
| Db - Cup Backface Backing Diameter | 2.36 in 59.94 mm |
| Ab - Cage-Cone Frontface Clearance | 0.1 in 2.5 mm |
| Aa - Cage-Cone Backface Clearance | 0.04 in 1 mm |
| a - Effective Center Location3 | -0.18 in -4.6 mm |
| Basic Load Ratings | |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 4480 lbf 19900 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 17300 lbf 76800 N |
| C0 - Static Radial Rating | 21200 lbf 94200 N |
| Ca90- Dynamic Thrust Rating (90 million revolutions)6 | 4180 lbf 18600 N |
| Factors | |
| K - Factor7 | 1.07 |
| e - ISO Factor8 | 0.55 |
| Y - ISO Factor9 | 1.1 |
| G1 - Heat Generation Factor (Roller-Raceway) | 23.4 |
| G2 - Heat Generation Factor (Rib-Roller End) | 9.4 |
| Cg - Geometry Factor10 | 0.0822 |
