294/670EM Thrust Spherical Roller Bearing, Brass Cage
The 294/670EM Spherical Roller Thrust Bearings are suitable for heavy-duty applications involving alignment errors and impacts. Classic applications include large gate hoists in hydraulic engineering, ship stern tubes, mining crushers, continuous casting machine slewing tables, large crane slewing supports, and oil drilling rig rotary tables.
The 294/670EM bearing is a Thrust spherical roller bearing with an inner diameter of 670 mm , an outer diameter of 1150 mm, a width of 290 mm. It typically uses PN (ABEC-1) grade precision tolerances and bearing steel rings, bearing steel rolling mlement. Its dynamic axial rated load is approximately 17027729 N, its static axial rated load is approximately 71964000 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
294/670EM bearings ( 670 mm x 1150 mm x 290 mm) have the advantages of withstand extremely high axial loads and has a self-aligning function to compensate for installation errors or shaft deformation, and are therefore widely used in the Ship propulsion systems, oil drilling rigs, large cranes, hydroelectric generators, and heavy-duty gearboxes.
| Part Number | 294/670EM |
| Design type | TSR-EM: Spherical inner and outer races; large end roller-riding brass cage |
| Bearing Type | Thrust spherical roller bearing |
| Interchangeable | TIMKEN 294/670EM |
| Manufacturer Part Code | 294/670 EM |
| Series | 294 series (294..EM) |
| Cage | EM = brass cage |
| Units | Metric |
| Tolerance class | PN (ABEC-1) |
| Dimension Series | 94 = Heavy |
| Heat stabilized | 200 °C (390 °F) |
| C0a Axial Static [lbf] | 16177507 |
| Ca Axial Dynamic [lbf] | 3827833 |
| Thermal Speed Rating [lbf] | 49 |
| nG Speed ratings (oil) [rpm] | 517 |
| d φ Inside [inch] | 26.3779 |
| D Φ Outside [inch] | 45.2755 |
| T Width [inch] | 11.4173 |
| T1 Cage Position [inch] | 8.2401 |
| T2 Cone Width [inch] | 4.6457 |
| T3 Cup Width [inch] | 5.9055 |
| S [inch] | 15.3937 |
| r Fillet Radius [inch] | 0.4724 |
| d1 [inch] | 40.5117 |
| D1 [inch] | 32.6771 |
| E (Max) Shoulder Diameter Housing [inch] | 35.3936 |
| H (Min) Shoulder Diameter Shaft [inch] | 37.2440 |
| Weight [lb] | 2556.0132 |
| Kc Centrifugal force constant | 21420 |
The 294/670EM Spherical Roller Thrust Bearings primarily consist of a shaft ring, a housing ring, asymmetrical drum-shaped rollers, and a cage assembly. The housing ring features a spherical raceway design, allowing the rollers to automatically adjust for alignment errors between the shaft and the housing ring.
The advantages of Spherical Roller Thrust Bearings lie in their superior self-aligning capability, effectively compensating for misalignment caused by installation skew or shaft deformation. They also possess extremely high axial load capacity, can withstand certain radial loads, and exhibit excellent impact resistance.
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