29236-E bearing: complete specifications & equivalents
The 29236-E is a ISO 104 radial bearing sized 180 x 250 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 180 mm |
| Outer diameter D | 250 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 495 kN |
| Basic static load rating C0 | 2040 kN |
| Fatigue load limit Pu | 212 kN |
| Reference speed (thermal) | 1600 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5800 g |
| Manufacturer designation | 29236 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 & 29200-series range
| Bore d | 7.087 in |
|---|---|
| Outer diameter D | 9.843 in |
| Width B | 1.654 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 29200-series | 150 mm |
| Largest outer diameter in 29200-series | 1060 mm |
| Width range across 29200-series | 39–155 mm |
| Bore position in 29200-series (smallest first) | 2 of 23 |
| Bore above smallest 29200-series size | 30 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 29236-E model number is decoded
29236 E is a spherical roller thrust bearing to ISO 104 in the high-speed 292 series: asymmetrical barrel rollers running on a sphered housing washer, sized 180×250×42 mm, as listed in SKF catalogue PUB BU/P1 17000 ch. 13.1. In 29236 E, the 292 series fixes the 250 mm OD and 42 mm height — 294 is the heaviest section per bore, 292 the lightest and fastest — and 36 selects the 180 mm seat. A minimum axial load of factor A 0.4 must be maintained — in the large 292 sizes this is a real force (often supplied by springs, oil pressure or the rotor weight), below it the rollers skid and smear. The 5800 g mass and 42 mm axial height sit between 180 and 250 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Verify the minimum axial load (factor A 0.4) 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
- 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
- crane hook assemblies where the hook block turns under full load
Known failure patterns
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
- washer back-face fretting where the seat is too narrow to support the full ring face
- abrasive paste forming as dust bypasses the housing seals into the open washer set
- condensation pitting in machines that run intermittently in humid environments
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
Selection pitfalls — read before you substitute
- At 180 mm bore, oil flow becomes the design variable: the 495 kN rating assumes fresh oil at the contact, and a blocked feed groove halves real life.
- 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 495/2040 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 1,600 r/min reference speed is the thermal criterion under load, the 2,600 r/min limiting speed is the mechanical ceiling; large 292 bearings are normally run well below it with oil cooling.
- 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 29236 E.
- The 495/2040 kN ratings and 5800 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
How is the 29236 E designation read?
292 is the dimension series (high-speed 292 series) and 36 the 180 mm bore (code 36 × 5); E is the cage execution (stamped steel E window cage). The sphered housing washer provides self-alignment.
Why is the minimum axial load (A 0.4) so important?
Spherical roller thrust bearings skid and smear immediately when run unloaded — on large sizes factor A 0.4 corresponds to a substantial force. Springs, oil lift or the rotor/load weight must be applied before rotation, including cold test runs.
Can the 29236 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 29236 E mounted?
Tight shaft washer on the 180 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 0.4 preload verified at commissioning.
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.