1380-1328-NTN bearing: complete specifications & equivalents
The 1380-1328-NTN is a ANSI ABMA 19.2 radial bearing sized 22.225 x 52.388 x 19.368 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 22.225 mm |
| Outer diameter D | 52.388 mm |
| Width B | 19.368 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 45 kN |
| Basic static load rating C0 | 43 kN |
| Limiting speed (mechanical) | 7600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 196 g |
| Manufacturer designation | NTN 4T-1380/1328 |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); 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 & 4t-inch-series range
| Bore d | 0.875 in |
|---|---|
| Outer diameter D | 2.063 in |
| Width B | 0.763 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 15.1 mm |
| Smallest bore in 4t-inch-series | 12.7 mm |
| Largest outer diameter in 4t-inch-series | 260 mm |
| Width range across 4t-inch-series | 10.998–77.788 mm |
| Bore position in 4t-inch-series (smallest first) | 13 of 148 |
| Bore above smallest 4t-inch-series size | 9.525000000000002 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1380-1329 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN cone 4T-1380 paired with a different cup (1329): cone interchangeable, cup differs — OD, assembled width T and ratings follow the cup. Verify the full cone/cup reference before substituting. |
| 1380-1328 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 22.225×52.388×19.368 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 1380-1328-NTN model number is decoded
The NTN 2203E inch table prints 4T-1380/1328 at 22.225 mm bore (0.875 in), 52.388 mm cup OD and 19.368 mm assembled T, with a grease limiting speed of 7,600 r/min and an oil ceiling of 10,000 r/min. Reading the designation: 4T-1380/1328 follows the ABMA inch convention — the number before the slash is the cone (inner ring with roller set and cage), the number after the slash is the cup (outer ring), and the pure-numeric inch family lettering ties the pair to its boundary plan. Imperial cross-check for the drawing: 22.225×52.388×19.368 mm converts to 0.875 × 2.063 × 0.763 in; the ABMA envelope swaps with like-numbered inch parts but the 45/43 kN ratings are NTN-specific. Housing fitment sequence for 4T-1380/1328: press the 1328 cup square into the 52.388 mm seat first, then bring the 1380 cone (on its 22.225 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. Running clearance of 4T-1380/1328 is set at mounting by axial displacement of cone or cup — the catalogue does not ship a preloaded set, so the drawing must state end play or preload.
Typical equipment & failure modes
Common applications
- lawn, garden and powersport axle positions
- small inch-shaft gearbox and reducer shafts
- conveyor roller and pulley shafts in inch-frame machinery
- utility-vehicle differential and pinion supports
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- flaking on one cone only when a bent shaft loads the O/X pair unevenly
- cup creep and housing fretting when the cup seat is cut too loose for the rotating load
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- edge loading when shaft deflection exceeds the few arc-minutes an adjusted pair tolerates
Selection pitfalls — read before you substitute
- At 22.225 mm (0.875 in) bore the thin cone and cup distort under an over-tight shaft nut; set the 4T-1380/1328 pair with a dial indicator on end play rather than by locknut feel.
- The pure-numeric inch family at 22.225 mm bore (52.388×19.368 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 1380/1328 reference at purchase.
- Replacing one half of an adjusted pair without resetting end play negates the 19.368 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Open 4T-1380/1328 sets have no seals: a hub or gearbox needs external sealing or the 7,600 r/min grease figure is meaningless once water reaches the cone rib.
- ABMA makes the 22.225×52.388 mm envelope interchangeable, not the ratings: NTN prints 45/43 kN for this execution and another make of the same number can differ in roller complement.
- The 45/43 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-1380/1328; internal geometry legitimately differs between inch-series makers, so re-verify ratings, adjustment and the exact cone/cup references before substituting another brand on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-1380/1328?
4T-1380/1328 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 22.225 mm bore (0.875 in), 52.388 mm outside diameter and 19.368 mm assembled width T (2.063 × 0.763 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 45 kN, C0 43 kN, grease limiting speed 7,600 r/min, oil speed 10,000 r/min, mass about 196 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-1380/1328 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 1380 cone or the 1328 cup can be replaced by an identical reference from NTN or another ABMA-dimensioned maker. Pairing the cone with a different cup reference is a different catalogue row: OD, assembled T and the 45/43 kN ratings change with the cup.
What is the difference between 4T-1380/1328 and a metric ISO 355 tapered bearing?
4T-1380/1328 follows the ABMA inch boundary plan with cone/cup references; ISO 355 bearings use metric dimension-series numbers (302, 322, …). Even where a metric size looks close to 22.225×52.388×19.368 mm, the envelopes and contact angles differ — the two systems are not drop-in interchangeable; check every boundary value before substituting.
What does the 4T prefix on 4T-1380/1328 mean?
4T is NTN's tapered roller bearing quality mark, stamped on cone and cup in the factory. It identifies NTN's 4T programme and is not a dimension or variant code, so interchange lists quote the bare 1380/1328 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-1380/1328 list two speeds, 7,600 and 10,000 r/min?
The lower figure, 7,600 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 4T-1380/1328 at 10,000 r/min because oil removes rib-contact heat better. Real limits still depend on pair adjustment, oil flow and cooling.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.