H913840-H913810 bearing: complete specifications & equivalents
The H913840-H913810 is a ANSI ABMA 19.2 radial bearing sized 59.987 x 146.05 x 41.275 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 59.987 mm |
| Outer diameter D | 146.05 mm |
| Width B | 41.275 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 220 kN |
| Basic static load rating C0 | 234 kN |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3220 g |
| Manufacturer designation | NTN 4T-H913840/H913810 |
| 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 | 2.362 in |
|---|---|
| Outer diameter D | 5.75 in |
| Width B | 1.625 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 43 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) | 75 of 148 |
| Bore above smallest 4t-inch-series size | 47.287000000000006 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| H913840 | 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 H913840-H913810 model number is decoded
NTN supplies this 2.362 in (59.987 mm) shaft position as 4T-H913840/H913810: cone H913840, cup H913810, profiled rollers and a pressed-steel cage, rated 220 kN basic dynamic and 234 kN static. 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 H913840/H913810 without it. Imperial cross-check for the drawing: 59.987×146.05×41.275 mm converts to 2.362 × 5.75 × 1.625 in; the ABMA envelope swaps with like-numbered inch parts but the 220/234 kN ratings are NTN-specific. Cup-side note for H913810: within the heavy H family tables the H913840 cone is listed against several cup options, and it is the cup that fixes the 146.05 mm OD and the 41.275 mm assembled width — quote the full H913840/H913810 pair, never the cone alone. Back-to-back (O) and face-to-face (X) arrangements of two 4T-H913840/H913810 sets react differently to shaft bending; choose the orientation for the moment load before locking shoulder geometry.
Typical equipment & failure modes
Common applications
- heavy truck and bus drive-axle differentials
- plant gearboxes on inch-dimensioned shaft lines
- large conveyor head pulleys in bulk-handling plant
- paper-machine and calender roll 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
- 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 59.987 mm cone by induction heating (max 120 °C) and the 146.05 mm cup with a press sleeve; at 3220 g a cocked ring brinells the raceway directly.
- The heavy H family at 59.987 mm bore (146.05×41.275 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full H913840/H913810 reference at purchase.
- Shaft and housing fillets must clear the ring chamfers of H913840 and H913810; use undercut shoulders so the rings seat on the face, not on a radius.
- Do not confuse T (41.275 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- Quote the full H913840/H913810 pair at ordering: the H913840 cone also ships against sibling cups, and a cup from another reference changes the 41.275 mm assembled width and the rating.
- The 220/234 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-H913840/H913810; 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-H913840/H913810?
4T-H913840/H913810 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 59.987 mm bore (2.362 in), 146.05 mm outside diameter and 41.275 mm assembled width T (5.75 × 1.625 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 220 kN, C0 234 kN, grease limiting speed 2,400 r/min, oil speed 3,200 r/min, mass about 3220 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-H913840/H913810 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the H913840 cone or the H913810 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 220/234 kN ratings change with the cup.
What is the difference between 4T-H913840/H913810 and a metric ISO 355 tapered bearing?
4T-H913840/H913810 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 59.987×146.05×41.275 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-H913840/H913810 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 H913840/H913810 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-H913840/H913810 list two speeds, 2,400 and 3,200 r/min?
The lower figure, 2,400 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-H913840/H913810 at 3,200 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.