29432 bearing: complete specifications & equivalents
The 29432 is a ISO 104 radial bearing sized 160 x 320 x 95 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 | 320 mm |
| Width B | 95 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 1670 kN |
| Basic static load rating C0 | 5150 kN |
| Fatigue load limit Pu | 320 kN |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 37000 g |
| Manufacturer designation | NTN 29432 |
| 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 | 6.299 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 3.74 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 80 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) | 14 of 46 |
| Bore above smallest 29400-series size | 100 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29432-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 160×320×95 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 29432 model number is decoded
The heavy-section 29400 spherical-thrust family entry 29432 combines a spherical housing-washer raceway with asymmetric barrel rollers in 95 mm of stack height. Reading the code: 294 is the dimension series (heavy-section 29400 spherical-thrust family), and 32 encodes the 160 mm bore (bore code x 5). The single printed speed, 1,000 r/min, is an oil-lubrication figure: the catalogue greases these bearings only for the smallest duties, and this size is rated for oil. Choose the heavy-section 29400 spherical-thrust family when heavy thrust meets misalignment: vertical turbines, mills and slew pivots are the classic homes. The 160 mm shaft washer normally mounts with a tight shaft fit; support the housing washer so it stays free to align on its spherical seat.
Typical equipment & failure modes
Common applications
- heavy rolling-mill and forging-press thrust seats
- large marine propulsion thrust supports
- crane and excavator main slew bearings duty
- rotary kiln and furnace thrust positions
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
- thermal distress when oil viscosity was chosen by habit instead of the operating-temperature calculation
- fretting on the shaft seat after the washer crept under reversing axial shock
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 294 heavy section tops the plan at this bore with the largest 320 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- Shock thrust above C0a 5150 kN leaves contact dents that seed fatigue; screwdown and press duties need the static check first.
- Oil-bath level is set for the cage, not the housing: too low starves the contact, too high churns heat at the 1,000 r/min end of the range.
- Oil-bath level is set for the cage, not the housing: too low starves the contact, too high churns heat at the 1,000 r/min end of the range.
- The Ca 1670/C0a 5150 kN ratings and 320 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29432; 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 29432?
29432 is a spherical roller thrust bearing to ISO 104: 160 mm shaft-washer bore, 320 mm outside diameter, 95 mm stack height (6.299 x 12.598 x 3.74 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 1670 kN, C0a 5150 kN and a 320 kN fatigue load limit Pu; limiting speed 1,000 r/min with oil lubrication; mass about 37000 g.
How is the 29432 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 32 encodes the 160 mm bore (bore code x 5). The 320 mm OD and 95 mm height follow the ISO 104 boundary plan for that series.
Can 29432 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, 1,000 r/min, for 29432?
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 29432?
The 160/320/95 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 1670 kN / C0a 5150 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.