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Technical Specification 
The HM212047/11 tapered roller bearing is part of DSBR’s premium inch-series bearing lineup, engineered for trucks, trailers, and industrial machinery. Manufactured from high-grade bearing steel and precision-ground for smooth rotation, this model delivers superior resistance to wear and extended operational life. Its cone and cup are fully separable, making installation and inspection easier while minimizing maintenance costs. DSBR’s state-of-the-art production technology and rigorous quality control ensure OEM-standard performance, making this bearing ideal for distributors and equipment manufacturers worldwide.
Technical Specification 
| Specifications | |
| Series | HM212000 |
| Cone Part Number | HM212047 |
| Cup Part Number | HM212011 |
| Design Unit | Inch |
| Cage Material | Stamped Steel |
| Related Assembly Number(s) | HM212047-902A5 |
| Dimensions | |
| d - Bore | 2 1/2 in 63.500 mm |
| D - Cup Outer Diameter | 4 13/16 in 122.238 mm |
| B - Cone Width | 1.5100 in 38.354 mm |
| C - Cup Width | 1.1700 in 29.718 mm |
| T - Bearing Width | 1.5000 in 38.100 mm |
| Abutment and Fillet Dimensions | |
| R - Cone Backface "To Clear" Radius1 | 0.280 in 7.110 mm |
| r - Cup Backface "To Clear" Radius2 | 0.130 in 3.30 mm |
| da - Cone Frontface Backing Diameter | 2.87 in 73 mm |
| db - Cone Backface Backing Diameter | 3.43 in 87 mm |
| Da - Cup Frontface Backing Diameter | 4.60 in 116.10 mm |
| Db - Cup Backface Backing Diameter | 4.25 in 107.95 mm |
| Ab - Cage-Cone Frontface Clearance | 0.15 in 3.8 mm |
| Aa - Cage-Cone Backface Clearance | 0.07 in 1.8 mm |
| a - Effective Center Location3 | -0.43 in -10.9 mm |
| Basic Load Ratings | |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 15600 lbf 69200 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 60000 lbf 267000 N |
| C0 - Static Radial Rating | 62700 lbf 279000 N |
| Ca90- Dynamic Thrust Rating (90 million revolutions)6 | 8990 lbf 40000 N |
| Factors | |
| K - Factor7 | 1.73 |
| e - ISO Factor8 | 0.34 |
| Y - ISO Factor9 | 1.78 |
| G1 - Heat Generation Factor (Roller-Raceway) | 92.2 |
| G2 - Heat Generation Factor (Rib-Roller End) | 18.1 |
| Cg - Geometry Factor10 | 0.0759 |
