29416 bearing: complete specifications & equivalents
The 29416 is a ISO 104 radial bearing sized 80 x 170 x 54 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 80 mm |
| Outer diameter D | 170 mm |
| Width B | 54 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 510 kN |
| Basic static load rating C0 | 1380 kN |
| Fatigue load limit Pu | 102 kN |
| Limiting speed (mechanical) | 1900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 6090 g |
| Manufacturer designation | NTN 29416 |
| 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 | 3.15 in |
|---|---|
| Outer diameter D | 6.693 in |
| Width B | 2.126 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 45 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) | 5 of 46 |
| Bore above smallest 29400-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29416-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×54 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 29416 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 29416 appears as a heavy-section 29400 spherical-thrust family bearing with a 80 mm shaft washer, 170 mm across the housing washer and 54 mm of height. Reading the code: 294 is the dimension series (heavy-section 29400 spherical-thrust family), and 16 encodes the 80 mm bore (bore code x 5). The single printed speed, 1,900 r/min, is an oil-lubrication figure: the catalogue greases these bearings only for the smallest duties, and this size is rated for oil. For oscillating or slow heavy duty, size from C0a 1380 kN with the static safety factor rather than from the life equation. Lift the bearing by the washers, never through the roller set; a 6.1 kg stack punishes improvisation.
Typical equipment & failure modes
Common applications
- vertical hydro-turbine and large pump thrust supports
- rolling-mill screwdown and backup-roll thrust positions
- large crane and excavator slew thrust rings
- pellet-mill and grinder main-shaft thrust seats
Known failure patterns
- edge stress and raceway flaking after the housing was machined so far out that the self-aligning travel ran out — alignment compensation is limited, not infinite
- oil-starvation polishing and then seizure of the cage guide bush when the bath level dropped below the cage
- flaking that started where radial load share grew past the design assumption — the bearing tolerates combined load only while axial load clearly dominates
- contamination denting from wear particles circulating in the oil bath — the dents seed the next round of surface fatigue
- fretting on the shaft seat after the washer crept under reversing axial shock
Selection pitfalls — read before you substitute
- Bearings of 80 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 170 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- Oil is not optional at this rating: the 1,900 r/min figure assumes oil lubrication, and a grease conversion is a redesign, not a fill change.
- Axial load must dominate; letting the radial share creep up because the radial bearing wore is the quiet path to early raceway flaking.
- Oil-bath level is set for the cage, not the housing: too low starves the contact, too high churns heat at the 1,900 r/min end of the range.
- The Ca 510/C0a 1380 kN ratings and 102 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29416; 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 29416?
29416 is a spherical roller thrust bearing to ISO 104: 80 mm shaft-washer bore, 170 mm outside diameter, 54 mm stack height (3.15 x 6.693 x 2.126 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 510 kN, C0a 1380 kN and a 102 kN fatigue load limit Pu; limiting speed 1,900 r/min with oil lubrication; mass about 6090 g.
How is the 29416 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 16 encodes the 80 mm bore (bore code x 5). The 170 mm OD and 54 mm height follow the ISO 104 boundary plan for that series.
Can 29416 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, 1,900 r/min, for 29416?
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 29416?
The 80/170/54 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 510 kN / C0a 1380 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.