Detailed description
H-21127-C bearings ( 351.15 mm x 669.925 mm x 318.9 mm) have the advantages of Composite load, high speed, high rigidity, and are therefore widely used in the rotary tables of oil and gas drilling rigs.

| Part Number | H-21127-C |
| Design type | TTDFLK 2: Two single tapered outer races; One flat inner race.; Inner-ring face keyway (optional); One outer-ring spacer with oil slots. |
| Bearing Type | Double-acting thrust tapered roller bearing |
| Interchangeable | TIMKEN H-21127-C |
| Manufacturer Part Code | H-21127-C |
| Cage | brass cage |
| Units | Inch |
| Tolerance class | PN (ABEC-1) |
| Thrust Race Number | Single |
| Cage type | MB |
| C0a Axial Static [lbf] | 4044952 |
| Ca1 Dynamic (1 Million Revolutions) [lbf] | 971652 |
| Ca90 Dynamic (90 Million Revolutions) [lbf] | 251384 |
| d φ Inside [inch] | 13.8248 |
| Do [inch] | 26.3749 |
| Dm [inch] | 24.0157 |
| T Width [inch] | 12.5551 |
| B [inch] | 5.1575 |
| r Fillet Radius [inch] | 0.5000 |
| R (Max) Shaft Fillet Radius [inch] | 0.1181 |
| da Mounting dimensions [inch] | 16.5354 |
| Db Mounting dimensions [inch] | 24.5000 |
| f Keyway Dimensions [inch] | 2.1654 |
| b Keyway Dimensions [inch] | 1.1811 |
| Weight [lb] | 1296.3048 |
The H-21127-C Thrust angular contact ball bearings are mainly composed of precision-ground steel balls, hardened and ground steel raceways, and a brass (or bronze) cage. Their core characteristic is their ability to simultaneously withstand axial thrust loads and a certain amount of radial load, and they also feature low friction, quiet operation, and suitability for high-speed operation.















