29332 bearing: complete specifications & equivalents
The 29332 is a ISO 104 radial bearing sized 160 x 270 x 67 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 | 270 mm |
| Width B | 67 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 915 kN |
| Basic static load rating C0 | 2860 kN |
| Fatigue load limit Pu | 223 kN |
| Limiting speed (mechanical) | 1300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 15900 g |
| Manufacturer designation | NTN 29332 |
| 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 & 29300-series range
| Bore d | 6.299 in |
|---|---|
| Outer diameter D | 10.63 in |
| Width B | 2.638 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 55 mm |
| Smallest bore in 29300-series | 85 mm |
| Largest outer diameter in 29300-series | 1180 mm |
| Width range across 29300-series | 39–230 mm |
| Bore position in 29300-series (smallest first) | 9 of 31 |
| Bore above smallest 29300-series size | 75 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29332-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 160×270×67 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 29332 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 29332 appears as a medium-section 29300 spherical-thrust family bearing with a 160 mm shaft washer, 270 mm across the housing washer and 67 mm of height. Two fields make up the code — 293 is the dimension series (medium-section 29300 spherical-thrust family) and 32 encodes the 160 mm bore (bore code x 5). At 67 mm of height the bearing packs the medium-section capacity into a stack far shorter than a comparable multi-row ball arrangement. If speed climbs toward the 1,300 r/min oil rating, the lubrication design — bath, circulation, cooling — becomes the real selection criterion. 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
- crane and excavator main slew bearings duty
- rotary kiln and furnace thrust positions
- large vertical mill and crusher main shafts
- heavy stacker/reclaimer and shiploading pivots
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
- flaking that started where radial load share grew past the design assumption — the bearing tolerates combined load only while axial load clearly dominates
- fatigue spalling on the shaft-washer raceway beginning at the high-stress inner end of the roller contact
- thermal distress when oil viscosity was chosen by habit instead of the operating-temperature calculation
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 293 medium section is the workhorse: balanced height and capacity for general heavy thrust duty at 160 mm bore.
- A spherical roller thrust bearing cannot take radial misalignment of the seats beyond its aligning travel — verify the housing geometry before blaming the bearing.
- Do not let the self-aligning travel absorb a bent shaft: the bearing aligns to seats, not to a shaft that whips.
- Axial load must dominate; letting the radial share creep up because the radial bearing wore is the quiet path to early raceway flaking.
- The Ca 915/C0a 2860 kN ratings and 223 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29332; 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 29332?
29332 is a spherical roller thrust bearing to ISO 104: 160 mm shaft-washer bore, 270 mm outside diameter, 67 mm stack height (6.299 x 10.63 x 2.638 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 915 kN, C0a 2860 kN and a 223 kN fatigue load limit Pu; limiting speed 1,300 r/min with oil lubrication; mass about 15900 g.
How is the 29332 designation structured?
293 is the dimension series (medium-section 29300 spherical-thrust family); 32 encodes the 160 mm bore (bore code x 5). The 270 mm OD and 67 mm height follow the ISO 104 boundary plan for that series.
Can 29332 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, 1,300 r/min, for 29332?
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 29332?
The 160/270/67 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 915 kN / C0a 2860 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.