29412 bearing: complete specifications & equivalents
The 29412 is a ISO 104 radial bearing sized 60 x 130 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 60 mm |
| Outer diameter D | 130 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 315 kN |
| Basic static load rating C0 | 805 kN |
| Fatigue load limit Pu | 68.5 kN |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2780 g |
| Manufacturer designation | NTN 29412 |
| 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 | 2.362 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 1.654 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 35 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) | 1 of 46 |
| Bore above smallest 29400-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29412-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×130×42 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 29412 model number is decoded
At 60 x 130 x 42 mm, NTN 29412 sits in the heavy-section 29400 spherical-thrust family of the spherical-thrust programme. Two fields make up the code — 294 is the dimension series (heavy-section 29400 spherical-thrust family) and 12 encodes the 60 mm bore (bore code x 5). A machined cage guided on the shaft-washer sleeve keeps the roller set spaced at the 2,600 r/min oil rating. Minimum axial load matters here too: at speed the rollers skid on a lightly loaded bearing, so check the catalogue minimum-load formula before downsizing the thrust spring. Check face runout of the support surfaces before assembly: the self-aligning feature absorbs steady misalignment, not a rocking seat.
Typical equipment & failure modes
Common applications
- bulk-handler stacker/reclaimer slew pivots
- vertical hydro-turbine and large pump thrust supports
- rolling-mill screwdown and backup-roll thrust positions
- large crane and excavator slew thrust rings
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
- 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 60 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 130 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- The C0a of 805 kN is a static rating — sizing continuous thrust from C0a alone overstates the raceway's life.
- Shock thrust above C0a 805 kN leaves contact dents that seed fatigue; screwdown and press duties need the static check first.
- Oil is not optional at this rating: the 2,600 r/min figure assumes oil lubrication, and a grease conversion is a redesign, not a fill change.
- The Ca 315/C0a 805 kN ratings and 68.5 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29412; 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 29412?
29412 is a spherical roller thrust bearing to ISO 104: 60 mm shaft-washer bore, 130 mm outside diameter, 42 mm stack height (2.362 x 5.118 x 1.654 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 315 kN, C0a 805 kN and a 68.5 kN fatigue load limit Pu; limiting speed 2,600 r/min with oil lubrication; mass about 2780 g.
How is the 29412 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 12 encodes the 60 mm bore (bore code x 5). The 130 mm OD and 42 mm height follow the ISO 104 boundary plan for that series.
Can 29412 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, 2,600 r/min, for 29412?
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 29412?
The 60/130/42 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 315 kN / C0a 805 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.