65237-65500 bearing: complete specifications & equivalents
The 65237-65500 is a ANSI ABMA 19.2 radial bearing sized 60.325 x 127 x 44.45 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 60.325 mm |
| Outer diameter D | 127 mm |
| Width B | 44.45 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 226 kN |
| Basic static load rating C0 | 263 kN |
| Limiting speed (mechanical) | 3100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2590 g |
| Manufacturer designation | NTN 4T-65237/65500 |
| 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 | 2.375 in |
|---|---|
| Outer diameter D | 5 in |
| Width B | 1.75 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 33.3 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) | 77 of 148 |
| Bore above smallest 4t-inch-series size | 47.625 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 65237 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 65237-65500 model number is decoded
The NTN 2203E inch table prints 4T-65237/65500 at 60.325 mm bore (2.375 in), 127 mm cup OD and 44.45 mm assembled T, with a grease limiting speed of 3,100 r/min and an oil ceiling of 4,200 r/min. 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 65237/65500 without it. Grease relubrication at the 3,100 r/min limiting speed targets the cone-rib contact; sustaining 4,200 r/min needs an oil supply directed at the large roller ends. Cup-side note for 65500: within the pure-numeric inch family tables the 65237 cone is listed against several cup options, and it is the cup that fixes the 127 mm OD and the 44.45 mm assembled width — quote the full 65237/65500 pair, never the cone alone. Fillet radii must clear the chamfers of the 65237 cone and 65500 cup; undercut shoulders seat the rings fully instead of bridging on a radius.
Typical equipment & failure modes
Common applications
- off-highway and forestry machine axles
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
- heavy truck and bus drive-axle differentials
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- cup creep and housing fretting when the cup seat is cut too loose for the rotating load
- flaking on one cone only when a bent shaft loads the O/X pair unevenly
- cage damage from a mounting blow transmitted through the roller complement
- rolling-contact fatigue spalling after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- Mount the 60.325 mm cone by induction heating (max 120 °C) and the 127 mm cup with a press sleeve; at 2590 g a cocked ring brinells the raceway directly.
- The pure-numeric inch family at 60.325 mm bore (127×44.45 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 65237/65500 reference at purchase.
- Fit selection follows the rotating ring: a rotating cone on a 60.325 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- Quote the full 65237/65500 pair at ordering: the 65237 cone also ships against sibling cups, and a cup from another reference changes the 44.45 mm assembled width and the rating.
- Shaft and housing fillets must clear the ring chamfers of 65237 and 65500; use undercut shoulders so the rings seat on the face, not on a radius.
- The 226/263 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-65237/65500; 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-65237/65500?
4T-65237/65500 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 60.325 mm bore (2.375 in), 127 mm outside diameter and 44.45 mm assembled width T (5 × 1.75 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 226 kN, C0 263 kN, grease limiting speed 3,100 r/min, oil speed 4,200 r/min, mass about 2590 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-65237/65500 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 65237 cone or the 65500 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 226/263 kN ratings change with the cup.
What is the difference between 4T-65237/65500 and a metric ISO 355 tapered bearing?
4T-65237/65500 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 60.325×127×44.45 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-65237/65500 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 65237/65500 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-65237/65500 list two speeds, 3,100 and 4,200 r/min?
The lower figure, 3,100 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-65237/65500 at 4,200 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.