Detailed description
T660DW bearings ( 142 mm x 293 mm x 130 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 | T660DW |
| Design type | TTDK 1: Two single flat outer races; One double tapered inner race; Inner-ring bore keyway |
| Bearing Type | Double-acting thrust tapered roller bearing |
| Interchangeable | TIMKEN T660DW |
| Manufacturer Part Code | T660DW |
| Units | Inch |
| Tolerance class | PN (ABEC-1) |
| Thrust Race Number | Double |
| Cage type | P |
| C0a Axial Static [lbf] | 1462181 |
| Ca1 Dynamic (1 Million Revolutions) [lbf] | 425432 |
| Ca90 Dynamic (90 Million Revolutions) [lbf] | 112061 |
| d φ Inside [inch] | 5.5905 |
| Do [inch] | 11.5354 |
| Dm [inch] | 12.0000 |
| T Width [inch] | 5.1181 |
| B [inch] | 2.1654 |
| r Fillet Radius [inch] | 0.1299 |
| R (Max) Shaft Fillet Radius [inch] | 0.0591 |
| da Mounting dimensions [inch] | 6.3779 |
| Db Mounting dimensions [inch] | 6.6142 |
| f Keyway Dimensions [inch] | 1.1811 |
| rk Keyway Dimensions [inch] | 0.3543 |
| Weight [lb] | 97.0024 |
The T660DW 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.















