29464 bearing: complete specifications & equivalents
The 29464 is a ISO 104 radial bearing sized 320 x 580 x 155 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 320 mm |
| Outer diameter D | 580 mm |
| Width B | 155 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 4100 kN |
| Basic static load rating C0 | 14200 kN |
| Fatigue load limit Pu | 820 kN |
| Limiting speed (mechanical) | 550 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 181000 g |
| Manufacturer designation | NTN 29464 |
| 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 | 12.598 in |
|---|---|
| Outer diameter D | 22.835 in |
| Width B | 6.102 in |
| ISO bore code | 64 |
| Radial section height (D−d)/2 | 130 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) | 24 of 46 |
| Bore above smallest 29400-series size | 260 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29464-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 320×580×155 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 29464 model number is decoded
29464 is an NTN spherical roller thrust bearing of the heavy-section 29400 spherical-thrust family: 320 mm bore, 580 mm outside diameter, 155 mm overall height in NTN Ball and Roller Bearings CAT.No.2203E. NTN builds the number from 294 is the dimension series (heavy-section 29400 spherical-thrust family); 64 encodes the 320 mm bore (bore code x 5). Catalogue mass is about 181 kg for the full washer-and-roller stack. For oscillating or slow heavy duty, size from C0a 14200 kN with the static safety factor rather than from the life equation. Lift the bearing by the washers, never through the roller set; a 181 kg stack punishes improvisation.
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
- 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
- roller skid smearing when axial load fell below the minimum while the shaft was still turning fast
- fatigue spalling on the shaft-washer raceway beginning at the high-stress inner end of the roller contact
- fatigue spalling on the shaft-washer raceway beginning at the high-stress inner end of the roller contact
Selection pitfalls — read before you substitute
- At 320 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 580 mm OD and tallest stack — confirm housing space and oil capacity before upgrading a 293 position.
- The C0a of 14200 kN is a static rating — sizing continuous thrust from C0a alone overstates the raceway's life.
- Mixing washers between bearings during overhaul is a real risk at this size — rollers and raceways run in together, so keep each 29464 stack as a set.
- The 155 mm stack height is part of the load path — any spacer or shim stack added under the housing washer must carry the full thrust without settling.
- The Ca 4100/C0a 14200 kN ratings and 820 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29464; 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 29464?
29464 is a spherical roller thrust bearing to ISO 104: 320 mm shaft-washer bore, 580 mm outside diameter, 155 mm stack height (12.598 x 22.835 x 6.102 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 4100 kN, C0a 14200 kN and a 820 kN fatigue load limit Pu; limiting speed 550 r/min with oil lubrication; mass about 181000 g.
How is the 29464 designation structured?
294 is the dimension series (heavy-section 29400 spherical-thrust family); 64 encodes the 320 mm bore (bore code x 5). The 580 mm OD and 155 mm height follow the ISO 104 boundary plan for that series.
Can 29464 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, 550 r/min, for 29464?
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 29464?
The 320/580/155 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 4100 kN / C0a 14200 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.