29322 bearing: complete specifications & equivalents
The 29322 is a ISO 104 radial bearing sized 110 x 190 x 48 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 110 mm |
| Outer diameter D | 190 mm |
| Width B | 48 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 495 kN |
| Basic static load rating C0 | 1500 kN |
| Fatigue load limit Pu | 120 kN |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5780 g |
| Manufacturer designation | NTN 29322 |
| 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 | 4.331 in |
|---|---|
| Outer diameter D | 7.48 in |
| Width B | 1.89 in |
| ISO bore code | 22 |
| Radial section height (D−d)/2 | 40 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) | 4 of 31 |
| Bore above smallest 29300-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29322-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 110×190×48 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 29322 model number is decoded
29322 is the 110 mm member of NTN's medium-section 29300 spherical-thrust family: 190 mm over the housing washer, 48 mm tall. The designation is 293 is the dimension series (medium-section 29300 spherical-thrust family) plus 22 encodes the 110 mm bore (bore code x 5). The static/dynamic ratio of 3.03 tells the story of a roller raceway: enormous reserve for slow, shocked or oscillating thrust. The 110/190/48 envelope follows ISO 104, so dimensional interchange holds between makers; osculation, roller profile and ratings do not automatically follow. After filling with oil, rotate slowly and watch torque and temperature; a misrouted oil feed shows up in the first minutes of running.
Typical equipment & failure modes
Common applications
- large crane and excavator slew thrust rings
- pellet-mill and grinder main-shaft thrust seats
- ship propulsion and rudder thrust blocks
- large mixer, reactor and agitator vertical shafts
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
- thermal distress when oil viscosity was chosen by habit instead of the operating-temperature calculation
- contamination denting from wear particles circulating in the oil bath — the dents seed the next round of surface fatigue
Selection pitfalls — read before you substitute
- Bearings of 110 mm bore need planned lifting and heating; a shaft washer driven on cold and crooked starts the failure clock before the first load.
- The 293 medium section is the workhorse: balanced height and capacity for general heavy thrust duty at 110 mm bore.
- Axial load must dominate; letting the radial share creep up because the radial bearing wore is the quiet path to early raceway flaking.
- Mixing washers between bearings during overhaul is a real risk at this size — rollers and raceways run in together, so keep each 29322 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 Ca 495/C0a 1500 kN ratings and 120 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29322; 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 29322?
29322 is a spherical roller thrust bearing to ISO 104: 110 mm shaft-washer bore, 190 mm outside diameter, 48 mm stack height (4.331 x 7.48 x 1.89 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 495 kN, C0a 1500 kN and a 120 kN fatigue load limit Pu; limiting speed 1,800 r/min with oil lubrication; mass about 5780 g.
How is the 29322 designation structured?
293 is the dimension series (medium-section 29300 spherical-thrust family); 22 encodes the 110 mm bore (bore code x 5). The 190 mm OD and 48 mm height follow the ISO 104 boundary plan for that series.
Can 29322 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, 1,800 r/min, for 29322?
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 29322?
The 110/190/48 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 495 kN / C0a 1500 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.