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Technical Specification 
The HM903249/HM903210 tapered roller bearing is built to handle heavy-duty operations in trucks, trailers, and agricultural machinery. Its inch-series design ensures compatibility and reliable support for combined axial and radial loads. Manufactured from alloy steel and precision-machined raceways, it minimizes friction and enhances operational efficiency. The bearing’s separable design facilitates maintenance and quick replacement, reducing downtime. DSBR ensures quality through advanced production lines and strict inspection standards, making this bearing a trusted solution for OEMs and aftermarket distributors seeking durability and cost-effectiveness.
Technical Specification 
| Specifications | |
| Series | HM903200 |
| Cone Part Number | HM903249 |
| Cup Part Number | HM903210 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Related Assembly Number(s) | EA24-900CA HM903249-90012 HM903249-90016 |
| Dimensions | |
| d - Bore | 1 3/4 in 44.45 mm |
| D - Cup Outer Diameter | 3.7500 in 95.250 mm |
| B - Cone Width | 1.1250 in 28.575 mm |
| C - Cup Width | 0.8750 in 22.225 mm |
| T - Bearing Width | 1.2188 in 30.958 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.14 in 3.560 mm |
| r - Cup Backface "To Clear" Radius2 | 0.030 in 0.76 mm |
| da - Cone Frontface Backing Diameter | 2.13 in 54 mm |
| db - Cone Backface Backing Diameter | 2.56 in 65 mm |
| Da - Cup Frontface Backing Diameter | 3.62 in 91.90 mm |
| Db - Cup Backface Backing Diameter | 3.19 in 81.03 mm |
| Ab - Cage-Cone Frontface Clearance | 0.11 in 2.8 mm |
| Aa - Cage-Cone Backface Clearance | 0.12 in 3 mm |
| a - Effective Center Location3 | 0.02 in 0.5 mm |
| Basic Load Ratings | |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 7950 lbf 35400 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 30700 lbf 136000 N |
| C0 - Static Radial Rating | 29700 lbf 132000 N |
| Ca90- Dynamic Thrust Rating (90 million revolutions)6 | 10100 lbf 44800 N |
| Factors | |
| K - Factor7 | 0.79 |
| e - ISO Factor8 | 0.74 |
| Y - ISO Factor9 | 0.81 |
| G1 - Heat Generation Factor (Roller-Raceway) | 33.7 |
| G2 - Heat Generation Factor (Rib-Roller End) | 9.91 |
| Cg - Geometry Factor10 | 0.101 |
