294-1000-EF bearing: complete specifications & equivalents
The 294-1000-EF is a ISO 104 radial bearing sized 1000 x 1670 x 402 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 1000 mm |
| Outer diameter D | 1670 mm |
| Width B | 402 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 31100 kN |
| Basic static load rating C0 | 140000 kN |
| Fatigue load limit Pu | 8650 kN |
| Reference speed (thermal) | 130 rpm |
| Limiting speed (mechanical) | 260 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3390000 g |
| Manufacturer designation | 294/1000 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 | 39.37 in |
|---|---|
| Outer diameter D | 65.748 in |
| Width B | 15.827 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 335 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) | 45 of 46 |
| Bore above smallest 29400-series size | 940 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 294-1000-EF model number is decoded
294/1000 EF is a spherical roller thrust bearing to ISO 104 in the heavy 294 series: asymmetrical barrel rollers running on a sphered housing washer, sized 1000×1670×402 mm, as listed in SKF catalogue PUB BU/P1 17000 ch. 13.1. SKF suffixes on spherical roller thrust bearings describe cages: E the steel window cage for the larger sizes, EM the machined brass execution, EF the extra-large steel-cage design; 294/1000 EF is the extra-large steel EF cage. A minimum axial load of factor A 1900 must be maintained — in the large 294 sizes this is a real force (often supplied by springs, oil pressure or the rotor weight), below it the rollers skid and smear. Minimum axial load is explicit at factor A 1900: below F_am = A·n² (or the catalogue's slow-speed floor) the barrel rollers skid; springs or the rotor's own weight are part of the selection, not an accessory. Large 294 bearings go on with induction heating (max 120 °C) and oil injection features on tapered seats; never strike the extra-large steel EF cage, and fill the oil bath to the catalogue level before first start.
Typical equipment & failure modes
Common applications
- 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
- paper machine calender and refiner discs with combined axial and radial force
Known failure patterns
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
- housing-washer rotation scored into an unmachined or loose seating face
- grease churning and overheating when a high-speed thrust position is over-packed
- brinelling of washer raceways from impact or mounting force applied through the rolling elements
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
Selection pitfalls — read before you substitute
- At 1000 mm bore and 3390 kg, mounting is a rigging operation: sphered seats, oil injection and rotation checks under preload follow the large-bearing mounting manual, not general practice.
- 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.
- the 130 r/min reference speed is the thermal criterion under load, the 260 r/min limiting speed is the mechanical ceiling; large 294 bearings are normally run well below it with oil cooling.
- 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 31100/140000 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 31100/140000 kN ratings and 3390000 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 destroys a spherical roller thrust bearing?
Unloaded rotation below A 1900 (roller smearing), interrupted oil supply on the large sizes, a missing sphered seating washer that removes alignment, and contamination. Limiting speed here is 260 r/min.
Which dimensions does the 294/1000 EF have?
A 294/1000 EF measures 1000 mm bore × 1670 mm outside diameter × 402 mm width (39.37 × 65.748 × 15.827 in). From SKF catalogue PUB BU/P1 17000: dynamic C 31100 kN, static C0 140000 kN, fatigue limit Pu 8650 kN, reference speed 130 r/min, limiting speed 260 r/min, mass about 3390000 g. Minimum axial load factor A 1900 must be maintained in service.
What is the difference between 292, 293 and 294 series?
292 is the light, fastest section; 293 the medium; 294 the heaviest with the largest OD per bore and the greatest thrust capacity. 294/1000 EF is the heavy 294 series, 1000×1670×402 mm.
What do E, EM and EF mean on 294/1000 EF?
They are cage designs for different size bands: E is the stamped steel window cage of the current design, EM the machined brass cage for heavy/slow sizes, EF the steel cage for extra-large bearings — not quality grades. This bearing carries the extra-large steel EF cage.
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.