29317-E bearing: complete specifications & equivalents
The 29317-E is a ISO 104 radial bearing sized 85 x 150 x 39 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 85 mm |
| Outer diameter D | 150 mm |
| Width B | 39 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 380 kN |
| Basic static load rating C0 | 1060 kN |
| Fatigue load limit Pu | 129 kN |
| Reference speed (thermal) | 2400 rpm |
| Limiting speed (mechanical) | 4000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2750 g |
| Manufacturer designation | 29317 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 & 29300-series range
| Bore d | 3.346 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.535 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 32.5 mm |
| Smallest bore in 29300-series | 85 mm |
| Largest outer diameter in 29300-series | 1180 mm |
| Width range across 29300-series | 39–230 mm |
| Bore position in 29300-series (smallest first) | 1 of 31 |
| Bore above smallest 29300-series size | 0 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 29317-E model number is decoded
The medium 293 series bearing 29317 E carries 380 kN of thrust on barrel rollers whose contact angle also tolerates radial force up to a fraction of the applied thrust — the standard heavy-duty thrust bearing for 85 mm shafts. In 29317 E, the 293 series fixes the 150 mm OD and 39 mm height — 294 is the heaviest section per bore, 292 the lightest and fastest — and 17 selects the 85 mm seat. The contact geometry also accepts simultaneous radial load up to roughly 55 % of the simultaneous axial force; beyond that mix, add a separate radial bearing to the arrangement. Selection arithmetic: C 380 kN against C0 1060 kN gives a C0/C ratio of 2.79 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Mounting: fit the shaft washer tight on the 85 mm seat, seat the sphered housing washer on its matching (often separately supplied) seating washer, and check the assembly swivels freely before applying the 380 kN working load.
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
- 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
- grease churning and overheating when a high-speed thrust position is over-packed
- rolling-contact fatigue spalling after the catalogue L10 life is exhausted
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
Selection pitfalls — read before you substitute
- At 85 mm bore the 293 bearing already weighs 2.8 kg and sits 39 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 380/1060 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.
- Minimum load factor A 0.11 dominates commissioning: start the oil flow and preload before rotation, especially on 293 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 380/1060 kN ratings and 2750 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 0.11) so important?
Spherical roller thrust bearings skid and smear immediately when run unloaded — on large sizes factor A 0.11 corresponds to a substantial force. Springs, oil lift or the rotor/load weight must be applied before rotation, including cold test runs.
Can the 29317 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 29317 E mounted?
Tight shaft washer on the 85 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 0.11 preload verified at commissioning.
What are the dimensions and ratings of the 29317 E?
A 29317 E measures 85 mm bore × 150 mm outside diameter × 39 mm width (3.346 × 5.906 × 1.535 in). From SKF catalogue PUB BU/P1 17000: dynamic C 380 kN, static C0 1060 kN, fatigue limit Pu 129 kN, reference speed 2,400 r/min, limiting speed 4,000 r/min, mass about 2750 g. Minimum axial load factor A 0.11 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.