29422-E bearing: complete specifications & equivalents
The 29422-E is a ISO 104 radial bearing sized 110 x 230 x 73 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 110 mm |
| Outer diameter D | 230 mm |
| Width B | 73 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1180 kN |
| Basic static load rating C0 | 3000 kN |
| Fatigue load limit Pu | 325 kN |
| Reference speed (thermal) | 1600 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 13500 g |
| Manufacturer designation | 29422 E |
| 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 | 4.331 in |
|---|---|
| Outer diameter D | 9.055 in |
| Width B | 2.874 in |
| ISO bore code | 22 |
| Radial section height (D−d)/2 | 60 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) | 9 of 46 |
| Bore above smallest 29400-series size | 50 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 29422-E model number is decoded
In SKF catalogue PUB BU/P1 17000, 29422 E denotes a self-aligning thrust bearing: the sphered back face of the housing washer follows seat misalignment while the stamped steel E window cage guides the rollers under 73 mm of axial section. The designation 29422 E separates into 294 (series), 22 (110 mm bore) and E; washers are separable for individual mounting. A minimum axial load of factor A 0.86 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 0.86: 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 stamped steel E window 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
- electrical erosion of raceways on VFD-driven shafts without grounding or insulation
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
Selection pitfalls — read before you substitute
- At 110 mm bore the 294 bearing already weighs 13.5 kg and sits 73 mm high — check the hook-nut thread and seat square-ness before trusting it with a lifted load.
- 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 1180/3000 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 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 1,600 r/min reference speed is the thermal criterion under load, the 2,800 r/min limiting speed is the mechanical ceiling; large 294 bearings are normally run well below it with oil cooling.
- The 1180/3000 kN ratings and 13500 g mass are SKF catalogue values transcribed from ch. 13.1 of PUB BU/P1 17000 (PDF table page 924); 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
Why is the minimum axial load (A 0.86) so important?
Spherical roller thrust bearings skid and smear immediately when run unloaded — on large sizes factor A 0.86 corresponds to a substantial force. Springs, oil lift or the rotor/load weight must be applied before rotation, including cold test runs.
Can the 29422 E 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.
How is a 29422 E mounted?
Tight shaft washer on the 110 mm seat, sphered housing washer on its matching seating washer, induction heating for large sizes, oil at the catalogue level before start, and the factor-A 0.86 preload verified at commissioning.
What are the dimensions and ratings of the 29422 E?
A 29422 E measures 110 mm bore × 230 mm outside diameter × 73 mm width (4.331 × 9.055 × 2.874 in). From SKF catalogue PUB BU/P1 17000: dynamic C 1180 kN, static C0 3000 kN, fatigue limit Pu 325 kN, reference speed 1,600 r/min, limiting speed 2,800 r/min, mass about 13500 g. Minimum axial load factor A 0.86 must be maintained in service.
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.