29232 bearing: complete specifications & equivalents
The 29232 is a ISO 104 radial bearing sized 160 x 225 x 39 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 160 mm |
| Outer diameter D | 225 mm |
| Width B | 39 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 400 kN |
| Basic static load rating C0 | 1460 kN |
| Fatigue load limit Pu | 126 kN |
| Limiting speed (mechanical) | 1700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4880 g |
| Manufacturer designation | NTN 29232 |
| 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 & 29200-series range
| Bore d | 6.299 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 1.535 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 32.5 mm |
| Smallest bore in 29200-series | 150 mm |
| Largest outer diameter in 29200-series | 1060 mm |
| Width range across 29200-series | 39–155 mm |
| Bore position in 29200-series (smallest first) | 2 of 26 |
| Bore above smallest 29200-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29232 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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 29232 model number is decoded
From the light-section 29200 spherical-thrust family, 29232 measures 160 mm through the shaft washer, 225 mm over the outside and 39 mm in assembled height. Decoding 29232: 292 is the dimension series (light-section 29200 spherical-thrust family), with 32 encodes the 160 mm bore (bore code x 5). Catalogue axial dynamic rating Ca is 400 kN against C0a 1460 kN — the roller contact line is why a 160 mm bore here out-carries any thrust ball bearing of the same size. Selection starts from the load case: axial must dominate, and any radial share must stay within the catalogue combined-load rule while the bearing self-aligns. 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
- rotary kiln and furnace thrust positions
- large vertical mill and crusher main shafts
- heavy stacker/reclaimer and shiploading pivots
- vertical hydro and pump-turbine main thrust blocks
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
- roller skid smearing when axial load fell below the minimum while the shaft was still turning fast
- contamination denting from wear particles circulating in the oil bath — the dents seed the next round of surface fatigue
- cage-pocket wear after long service with vibration at standstill, the rollers hammering the pocket surfaces
Selection pitfalls — read before you substitute
- At 160 mm bore, seating geometry, oil supply and the minimum-load guarantee decide life — field improvisation on any of the three is the usual root cause.
- The 292 light section is the speed-and-space end of the spherical-thrust plan — for the same 160 mm bore it trades capacity for a smaller 225 mm OD and lower height.
- Self-aligning does not mean self-locating: the housing washer must stay free on its spherical seat — clamping it flat destroys the feature the 29232 was chosen for.
- The C0a of 1460 kN is a static rating — sizing continuous thrust from C0a alone overstates the raceway's life.
- Below the minimum axial load the rollers skid; at 1,700 r/min the Ca of 400 kN never comes into play before the raceway is smeared.
- The Ca 400/C0a 1460 kN ratings and 126 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29232; 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 29232?
29232 is a spherical roller thrust bearing to ISO 104: 160 mm shaft-washer bore, 225 mm outside diameter, 39 mm stack height (6.299 x 8.858 x 1.535 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 400 kN, C0a 1460 kN and a 126 kN fatigue load limit Pu; limiting speed 1,700 r/min with oil lubrication; mass about 4880 g.
How is the 29232 designation structured?
292 is the dimension series (light-section 29200 spherical-thrust family); 32 encodes the 160 mm bore (bore code x 5). The 225 mm OD and 39 mm height follow the ISO 104 boundary plan for that series.
Can 29232 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, 1,700 r/min, for 29232?
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 29232?
The 160/225/39 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 400 kN / C0a 1460 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.