29413 bearing: complete specifications & equivalents
The 29413 is a ISO 104 radial bearing sized 65 x 140 x 45 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 65 mm |
| Outer diameter D | 140 mm |
| Width B | 45 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 370 kN |
| Basic static load rating C0 | 945 kN |
| Fatigue load limit Pu | 75.5 kN |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3440 g |
| Manufacturer designation | NTN 29413 |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.772 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 37.5 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) | 2 of 46 |
| Bore above smallest 29400-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29413-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×45 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 29413 model number is decoded
29413 is the 65 mm member of NTN's heavy-section 29400 spherical-thrust family: 140 mm over the housing washer, 45 mm tall. Decoding 29413: 294 is the dimension series (heavy-section 29400 spherical-thrust family), with 13 encodes the 65 mm bore (bore code x 5). Catalogue mass is about 3.4 kg for the full washer-and-roller stack. The 65/140/45 envelope follows ISO 104, so dimensional interchange holds between makers; osculation, roller profile and ratings do not automatically follow. Fill the housing with the specified oil to the level that reaches the cage — these bearings are oil-bath or circulation machines, not grease machines.
Typical equipment & failure modes
Common applications
- rolling-mill screwdown and backup-roll thrust positions
- large crane and excavator slew thrust rings
- pellet-mill and grinder main-shaft thrust seats
- ship propulsion and rudder thrust blocks
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
- fretting on the shaft seat after the washer crept under reversing axial shock
- cage-pocket wear after long service with vibration at standstill, the rollers hammering the pocket surfaces
Selection pitfalls — read before you substitute
- Bearings of 65 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 140 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- Mixing washers between bearings during overhaul is a real risk at this size — rollers and raceways run in together, so keep each 29413 stack as a set.
- A spherical roller thrust bearing cannot take radial misalignment of the seats beyond its aligning travel — verify the housing geometry before blaming the bearing.
- The 45 mm stack height is part of the load path — any spacer or shim stack added under the housing washer must carry the full thrust without settling.
- The Ca 370/C0a 945 kN ratings and 75.5 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29413; 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 29413?
29413 is a spherical roller thrust bearing to ISO 104: 65 mm shaft-washer bore, 140 mm outside diameter, 45 mm stack height (2.559 x 5.512 x 1.772 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 370 kN, C0a 945 kN and a 75.5 kN fatigue load limit Pu; limiting speed 2,400 r/min with oil lubrication; mass about 3440 g.
How is the 29413 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 13 encodes the 65 mm bore (bore code x 5). The 140 mm OD and 45 mm height follow the ISO 104 boundary plan for that series.
Can 29413 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, 2,400 r/min, for 29413?
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 29413?
The 65/140/45 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 370 kN / C0a 945 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.