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Technical Specification 
The HM807049/HM807010 tapered roller bearing from DSBR is a heavy-duty inch-series bearing designed to withstand extreme radial and axial loads. Made from premium alloy steel and finished with precision grinding, this bearing guarantees smooth rotation, reduced friction, and extended lifespan. It is widely used in truck axles, trailers, construction machinery, and gearboxes, where reliability is essential. The separable cone and cup design ensures easy installation, maintenance, and inspection. Backed by DSBR’s state-of-the-art production facilities and strict quality control, this model offers outstanding value for distributors, OEMs, and aftermarket suppliers seeking consistent performance and reliability.
Technical Specification 
| Specifications | |
| Series | HM807000 |
| Cone Part Number | HM807049 |
| Cup Part Number | HM807010 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Related Assembly Number(s) | HM807049-90023 HM807049-90029 HM807049-902A4 HM807049-902A5 |
| Dimensions | |
| d - Bore | 2.1250 in 53.975 mm |
| D - Cup Outer Diameter | 4.1250 in 104.775 mm |
| B - Cone Width | 1.4375 in 36.513 mm |
| C - Cup Width | 1.1250 in 28.575 mm |
| T - Bearing Width | 1.4375 in 36.513 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.14 in 3.600 mm |
| r - Cup Backface "To Clear" Radius2 | 0.130 in 3.30 mm |
| da - Cone Frontface Backing Diameter | 2.48 in 63.1 mm |
| db - Cone Backface Backing Diameter | 2.87 in 73 mm |
| Da - Cup Frontface Backing Diameter | 3.96 in 100.10 mm |
| Db - Cup Backface Backing Diameter | 3.50 in 88.90 mm |
| Ab - Cage-Cone Frontface Clearance | 0.1 in 2.5 mm |
| Aa - Cage-Cone Backface Clearance | 0.12 in 3 mm |
| a - Effective Center Location3 | -0.29 in -7.4 mm |
| Basic Load Ratings | |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 11900 lbf 52700 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 45700 lbf 203000 N |
| C0 - Static Radial Rating | 50200 lbf 223000 N |
| Ca90- Dynamic Thrust Rating (90 million revolutions)6 | 9890 lbf 44000 N |
| Factors | |
| K - Factor7 | 1.2 |
| e - ISO Factor8 | 0.49 |
| Y - ISO Factor9 | 1.23 |
| Cg - Geometry Factor10 | 0.076 |
