11590-11520-NTN bearing: complete specifications & equivalents
The 11590-11520-NTN is a ANSI ABMA 19.2 radial bearing sized 15.875 x 42.862 x 14.288 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 15.875 mm |
| Outer diameter D | 42.862 mm |
| Width B | 14.288 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 19.5 kN |
| Basic static load rating C0 | 17.5 kN |
| Limiting speed (mechanical) | 8700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 103 g |
| Manufacturer designation | NTN 4T-11590/11520 |
| 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 | 0.625 in |
|---|---|
| Outer diameter D | 1.687 in |
| Width B | 0.563 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 13.5 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) | 3 of 148 |
| Bore above smallest 4t-inch-series size | 3.1750000000000007 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 11590-11520 | SKF | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
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 11590-11520-NTN model number is decoded
4T-11590/11520 is an NTN inch-series single-row tapered roller bearing: a separable cone-and-cup pair on the ABMA inch boundary plan, 15.875×42.862×14.288 mm (assembled width T), for a shaft of about 15.875 mm (0.625 in). The 4T prefix is NTN's tapered roller quality mark stamped on both parts; it is a brand mark, not a size code, so cross-references quote 11590/11520 without it. The 13.5 mm radial section over the 15.875 mm bore positions the contact line of the pair; abutment shoulders and spacers are dimensioned from that geometry, not from the bore alone. The printed 19.5/17.5 kN ratings belong to the assembled 11590+11520 pair; a sibling row using the same cone with a different cup carries its own rating row because the raceway track shifts with the cup. Back-to-back (O) and face-to-face (X) arrangements of two 4T-11590/11520 sets react differently to shaft bending; choose the orientation for the moment load before locking shoulder geometry.
Typical equipment & failure modes
Common applications
- light trailer and boat-trailer wheel hubs
- small agricultural implement wheels and auger drives
- lawn, garden and powersport axle positions
- small inch-shaft gearbox and reducer shafts
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- false brinelling on a stationary pair exposed to vibration during transport or standby
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- cage damage from a mounting blow transmitted through the roller complement
- water-induced pitting when the open bearing sees washdown without external seals
Selection pitfalls — read before you substitute
- At 15.875 mm (0.625 in) bore the thin cone and cup distort under an over-tight shaft nut; set the 4T-11590/11520 pair with a dial indicator on end play rather than by locknut feel.
- The pure-numeric inch family at 15.875 mm bore (42.862×14.288 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 11590/11520 reference at purchase.
- ABMA makes the 15.875×42.862 mm envelope interchangeable, not the ratings: NTN prints 19.5/17.5 kN for this execution and another make of the same number can differ in roller complement.
- Quote the full 11590/11520 pair at ordering: the 11590 cone also ships against sibling cups, and a cup from another reference changes the 14.288 mm assembled width and the rating.
- Fit selection follows the rotating ring: a rotating cone on a 15.875 mm shaft takes a j5/k5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- The 19.5/17.5 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-11590/11520; 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-11590/11520?
4T-11590/11520 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 15.875 mm bore (0.625 in), 42.862 mm outside diameter and 14.288 mm assembled width T (1.687 × 0.563 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 19.5 kN, C0 17.5 kN, grease limiting speed 8,700 r/min, oil speed 12,000 r/min, mass about 103 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-11590/11520 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 11590 cone or the 11520 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 19.5/17.5 kN ratings change with the cup.
What is the difference between 4T-11590/11520 and a metric ISO 355 tapered bearing?
4T-11590/11520 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 15.875×42.862×14.288 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-11590/11520 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 11590/11520 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-11590/11520 list two speeds, 8,700 and 12,000 r/min?
The lower figure, 8,700 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-11590/11520 at 12,000 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.