29417 bearing: complete specifications & equivalents
The 29417 is a ISO 104 radial bearing sized 85 x 180 x 58 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 85 mm |
| Outer diameter D | 180 mm |
| Width B | 58 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 545 kN |
| Basic static load rating C0 | 1480 kN |
| Fatigue load limit Pu | 118 kN |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7200 g |
| Manufacturer designation | NTN 29417 |
| Standard | ISO 104 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & 29400-series range
| Bore d | 3.346 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 2.283 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 47.5 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) | 6 of 46 |
| Bore above smallest 29400-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29417-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×180×58 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 29417 model number is decoded
NTN 29417 belongs to the heavy-section 29400 spherical-thrust family of spherical roller thrust bearings: 85 / 180 / 58 mm (bore / OD / height). Two fields make up the code — 294 is the dimension series (heavy-section 29400 spherical-thrust family) and 17 encodes the 85 mm bore (bore code x 5). Catalogue axial dynamic rating Ca is 545 kN against C0a 1480 kN — the roller contact line is why a 85 mm bore here out-carries any thrust ball bearing of the same size. If speed climbs toward the 1,800 r/min oil rating, the lubrication design — bath, circulation, cooling — becomes the real selection criterion. The 85 mm shaft washer normally mounts with a tight shaft fit; support the housing washer so it stays free to align on its spherical seat.
Typical equipment & failure modes
Common applications
- large crane and excavator slew thrust rings
- pellet-mill and grinder main-shaft thrust seats
- ship propulsion and rudder thrust blocks
- large mixer, reactor and agitator vertical shafts
Known failure patterns
- cage and roller-end scoring when the shaft was forced into alignment by the bearing itself during a bent-shaft rescue
- roller/raceway scuffing from an interrupted oil supply — at these loads the EHL film is the only thing between rolling and smearing
- roller skid smearing when axial load fell below the minimum while the shaft was still turning fast
- cage-pocket wear after long service with vibration at standstill, the rollers hammering the pocket surfaces
- thermal distress when oil viscosity was chosen by habit instead of the operating-temperature calculation
Selection pitfalls — read before you substitute
- Bearings of 85 mm bore need planned lifting and heating; a shaft washer driven on cold and crooked starts the failure clock before the first load.
- The 294 heavy section tops the plan at this bore with the largest 180 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- Below the minimum axial load the rollers skid; at 1,800 r/min the Ca of 545 kN never comes into play before the raceway is smeared.
- Below the minimum axial load the rollers skid; at 1,800 r/min the Ca of 545 kN never comes into play before the raceway is smeared.
- Below the minimum axial load the rollers skid; at 1,800 r/min the Ca of 545 kN never comes into play before the raceway is smeared.
- The Ca 545/C0a 1480 kN ratings and 118 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29417; roller profile and osculation legitimately differ between manufacturers, so re-verify ratings, oil supply and minimum load before substituting another make.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 29417?
29417 is a spherical roller thrust bearing to ISO 104: 85 mm shaft-washer bore, 180 mm outside diameter, 58 mm stack height (3.346 x 7.087 x 2.283 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 545 kN, C0a 1480 kN and a 118 kN fatigue load limit Pu; limiting speed 1,800 r/min with oil lubrication; mass about 7200 g.
How is the 29417 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 17 encodes the 85 mm bore (bore code x 5). The 180 mm OD and 58 mm height follow the ISO 104 boundary plan for that series.
Can 29417 handle misalignment and radial load?
Yes to both, with limits. The spherical housing-washer raceway lets the bearing self-align against steady seat misalignment, and the angled roller contact tolerates a radial share while axial load clearly dominates. It is not a radial bearing: shaft radial location still needs its own radial bearing.
Why does NTN print only an oil speed, 1,800 r/min, for 29417?
Spherical roller thrust bearings of this size work under contact stresses that need an elastohydrodynamic oil film; grease is reserved for the smallest, slowest duties. The printed figure is the limiting speed with the catalogue oil-lubrication state — bath level, viscosity and cooling decide how close a real installation may run.
What should be checked before substituting another make for 29417?
The 85/180/58 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 545 kN / C0a 1480 kN, the oil speed rating and the minimum-load requirement against the donor catalogue before swapping on a rated drive.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.