29452-E bearing: complete specifications & equivalents
The 29452-E is a ISO 104 radial bearing sized 260 x 480 x 132 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 260 mm |
| Outer diameter D | 480 mm |
| Width B | 132 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 4050 kN |
| Basic static load rating C0 | 12900 kN |
| Fatigue load limit Pu | 1080 kN |
| Reference speed (thermal) | 750 rpm |
| Limiting speed (mechanical) | 1300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 105000 g |
| Manufacturer designation | 29452 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 | 10.236 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 5.197 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 110 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) | 21 of 46 |
| Bore above smallest 29400-series size | 200 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 29452-E model number is decoded
SKF supplies 29452 E for very heavy one-direction axial load: 4050 kN dynamic and 12900 kN static, with the spherical seat absorbing shaft deflection and some simultaneous radial force. Reading the code: 294 gives the dimension series (heavy 294 series) and 52 the 260 mm shaft washer bore (code 52 × 5); the E sets the cage design. The stamped steel E window cage is matched to size: the E design is the current standard with a stamped window-type steel cage. The sphered housing washer self-aligns during mounting and under shaft deflection. Selection arithmetic: C 4050 kN against C0 12900 kN gives a C0/C ratio of 3.19 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Verify the minimum axial load (factor A 16) immediately at commissioning — a cold start unloaded smears the rollers; spring preload or rotor weight must be present before the shaft rotates.
Typical equipment & failure modes
Common applications
- crane hook assemblies where the hook block turns under full load
- 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
Known failure patterns
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
- shaft-washer creep and fretting corrosion on a soft or undersized shaft shoulder
- grease churning and overheating when a high-speed thrust position is over-packed
- condensation pitting in machines that run intermittently in humid environments
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
Selection pitfalls — read before you substitute
- At 260 mm bore, oil flow becomes the design variable: the 4050 kN rating assumes fresh oil at the contact, and a blocked feed groove halves real life.
- Radial force beyond the permitted fraction of simultaneous thrust (about 0.55·F_a) overloads one side of the barrel-roller set — add a radial bearing instead of leaning on 29452 E.
- 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.
- Minimum load factor A 16 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.
- The 4050/12900 kN ratings and 105000 g mass are SKF catalogue values transcribed from ch. 13.1 of PUB BU/P1 17000 (PDF table page 926); 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 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. 29452 E is the heavy 294 series, 260×480×132 mm.
What do E, EM and EF mean on 29452 E?
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 stamped steel E window cage.
Where is the 29452 E typically used?
Crane hook blocks, extruder and injection-moulding screws, vertical hydro generators, large gearbox thrust positions and heavy mill shafts — places with very high one-direction axial load plus shaft deflection.
What destroys a spherical roller thrust bearing?
Unloaded rotation below A 16 (roller smearing), interrupted oil supply on the large sizes, a missing sphered seating washer that removes alignment, and contamination. Limiting speed here is 1,300 r/min.
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.