294-800-EF bearing: complete specifications & equivalents
The 294-800-EF is a ISO 104 radial bearing sized 800 x 1360 x 335 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 800 mm |
| Outer diameter D | 1360 mm |
| Width B | 335 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 20200 kN |
| Basic static load rating C0 | 93000 kN |
| Fatigue load limit Pu | 5850 kN |
| Reference speed (thermal) | 190 rpm |
| Limiting speed (mechanical) | 360 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2030000 g |
| Manufacturer designation | 294/800 EF |
| Standard | ISO 104 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 13.1 spherical roller thrust bearings |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 13.1 spherical roller thrust bearings) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 13.1 spherical roller thrust bearings); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 29400-series range
| Bore d | 31.496 in |
|---|---|
| Outer diameter D | 53.543 in |
| Width B | 13.189 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 280 mm |
| Smallest bore in 29400-series | 60 mm |
| Largest outer diameter in 29400-series | 1770 mm |
| Width range across 29400-series | 42–426 mm |
| Bore position in 29400-series (smallest first) | 41 of 46 |
| Bore above smallest 29400-series size | 740 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 294-800-EF model number is decoded
294/800 EF is the classic hook-block and screw-end thrust bearing: 800 mm shaft washer bore, 1360 mm OD, minimum axial load factor A 820, and free rotation under load thanks to the spherical geometry. The designation 294/800 EF separates into 294 (series), 800 mm (slash-size) (800 mm bore — bore 800 mm is written directly after the slash) and EF; washers are separable for individual mounting. The heavy 294 series is typically oil-bath or forced-oil lubricated in the large sizes: the pumping action of the barrel rollers drives oil through the contact, and interrupted oil supply damages the bearing fastest. Speed planning separates the 190 r/min thermal reference from the 360 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Mounting: fit the shaft washer tight on the 800 mm seat, seat the sphered housing washer on its matching (often separately supplied) seating washer, and check the assembly swivels freely before applying the 20200 kN working load.
Typical equipment & failure modes
Common applications
- injection moulding machine and extruder screw thrust positions
- vertical hydro generators and large vertical pump motors
- coal mill, cement mill and sugar mill thrust bearings under shock load
- marine shaft and rudder-style thrust positions with seat deflection
Known failure patterns
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
- housing-washer rotation scored into an unmachined or loose seating face
- abrasive paste forming as dust bypasses the housing seals into the open washer set
- hard-particle indentation where oil or grease filtration is inadequate
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
Selection pitfalls — read before you substitute
- At 800 mm bore and 2030 kg, mounting is a rigging operation: sphered seats, oil injection and rotation checks under preload follow the large-bearing mounting manual, not general practice.
- Minimum load factor A 820 dominates commissioning: start the oil flow and preload before rotation, especially on 294 bearings where an unloaded cold start smears the rollers.
- The spherical seat tolerates static misalignment, not a continuously rocking housing — a loose sphered seat frets under oscillation and needs the catalogue seat tolerances plus clean, greased contact.
- E, EM and EF suffixes are cage designs for different size bands, not quality grades: substitute only within the same envelope and check the lubricant compatibility of the cage material.
- The 20200/93000 kN figures assume the matching sphered seating washer is fitted where the catalogue calls for it; a flat housing seat removes the self-aligning function.
- The 20200/93000 kN ratings and 2030000 g mass are SKF catalogue values transcribed from ch. 13.1 of PUB BU/P1 17000 (PDF table page 930); mounting data — the minimum axial load factor A — appears in the running text because the structured record carries the boundary envelope only.
Frequently asked questions
What are the dimensions and ratings of the 294/800 EF?
A 294/800 EF measures 800 mm bore × 1360 mm outside diameter × 335 mm width (31.496 × 53.543 × 13.189 in). From SKF catalogue PUB BU/P1 17000: dynamic C 20200 kN, static C0 93000 kN, fatigue limit Pu 5850 kN, reference speed 190 r/min, limiting speed 360 r/min, mass about 2030000 g. Minimum axial load factor A 820 must be maintained in service.
How is the 294/800 EF designation read?
294 is the dimension series (heavy 294 series) and 800 mm (slash-size) the 800 mm bore (the bore is written directly after the slash (no bore code)); EF is the cage execution (extra-large steel EF cage). The sphered housing washer provides self-alignment.
Why is the minimum axial load (A 820) so important?
Spherical roller thrust bearings skid and smear immediately when run unloaded — on large sizes factor A 820 corresponds to a substantial force. Springs, oil lift or the rotor/load weight must be applied before rotation, including cold test runs.
Can the 294/800 EF also carry radial load?
Yes, up to roughly 55 % of the simultaneous axial force, thanks to the steep contact angle of the barrel rollers. Beyond that mix, specify a separate radial bearing; the primary duty remains one-direction thrust.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 13.1 spherical roller thrust bearings on 2026-09-27. Read our editorial & correction policy.