29360 bearing: complete specifications & equivalents
The 29360 is a ISO 104 radial bearing sized 300 x 480 x 109 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 300 mm |
| Outer diameter D | 480 mm |
| Width B | 109 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 2380 kN |
| Basic static load rating C0 | 8250 kN |
| Fatigue load limit Pu | 580 kN |
| Limiting speed (mechanical) | 700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 75800 g |
| Manufacturer designation | NTN 29360 |
| 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 | 11.811 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 4.291 in |
| ISO bore code | 60 |
| Radial section height (D−d)/2 | 90 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) | 18 of 31 |
| Bore above smallest 29300-series size | 215 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 29360-E | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 300×480×109 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 29360 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 29360 appears as a medium-section 29300 spherical-thrust family bearing with a 300 mm shaft washer, 480 mm across the housing washer and 109 mm of height. Reading the code: 293 is the dimension series (medium-section 29300 spherical-thrust family), and 60 encodes the 300 mm bore (bore code x 5). Catalogue mass is about 76 kg for the full washer-and-roller stack. Where the shaft also needs radial location, pair this bearing with a spherical roller or cylindrical radial bearing — the thrust bearing is not a radial guide. On vertical shafts, confirm the minimum axial load from the rotor weight plus any spring preload before the first run at speed.
Typical equipment & failure modes
Common applications
- large marine propulsion thrust supports
- crane and excavator main slew bearings duty
- rotary kiln and furnace thrust positions
- large vertical mill and crusher main 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
- fatigue spalling on the shaft-washer raceway beginning at the high-stress inner end of the roller contact
- fretting on the shaft seat after the washer crept under reversing axial shock
Selection pitfalls — read before you substitute
- At 300 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 300 mm bore.
- The 109 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.
- Self-aligning does not mean self-locating: the housing washer must stay free on its spherical seat — clamping it flat destroys the feature the 29360 was chosen for.
- The 109 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 2380/C0a 8250 kN ratings and 580 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 29360; 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 29360?
29360 is a spherical roller thrust bearing to ISO 104: 300 mm shaft-washer bore, 480 mm outside diameter, 109 mm stack height (11.811 x 18.898 x 4.291 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 2380 kN, C0a 8250 kN and a 580 kN fatigue load limit Pu; limiting speed 700 r/min with oil lubrication; mass about 75800 g.
How is the 29360 designation structured?
293 is the dimension series (medium-section 29300 spherical-thrust family); 60 encodes the 300 mm bore (bore code x 5). The 480 mm OD and 109 mm height follow the ISO 104 boundary plan for that series.
Can 29360 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, 700 r/min, for 29360?
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 29360?
The 300/480/109 mm envelope is ISO 104 interchangeable, but roller profile, osculation, cage and washer details are maker-specific. Re-verify Ca 2380 kN / C0a 8250 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.