JH913848-JH913811 bearing: complete specifications & equivalents
The JH913848-JH913811 is a ANSI ABMA 19.2 radial bearing sized 70 x 150 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 | 70 mm |
| Outer diameter D | 150 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 | 3090 g |
| Manufacturer designation | NTN 4T-JH913848/JH913811 |
| 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 | 2.756 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.625 in |
| ISO bore code | 48 |
| Radial section height (D−d)/2 | 40 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) | 88 of 148 |
| Bore above smallest 4t-inch-series size | 57.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JH913848 | 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 JH913848-JH913811 model number is decoded
NTN supplies this 2.756 in (70 mm) shaft position as 4T-JH913848/JH913811: cone JH913848, cup JH913811, profiled rollers and a pressed-steel cage, rated 220 kN basic dynamic and 234 kN static. Reading the designation: 4T-JH913848/JH913811 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 JH heavy metric-envelope family lettering ties the pair to its boundary plan. Imperial cross-check for the drawing: 70×150×41.275 mm converts to 2.756 × 5.906 × 1.625 in; the ABMA envelope swaps with like-numbered inch parts but the 220/234 kN ratings are NTN-specific. Housing fitment sequence for 4T-JH913848/JH913811: press the JH913811 cup square into the 150 mm seat first, then bring the JH913848 cone (on its 70 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. After bedding-in, re-check the end play of the adjusted 4T-JH913848/JH913811 pair — initial seating of the ring faces relaxes the setting slightly.
Typical equipment & failure modes
Common applications
- plant gearboxes on inch-dimensioned shaft lines
- large conveyor head pulleys in bulk-handling plant
- paper-machine and calender roll supports
- off-highway and forestry machine axles
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- 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
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Mount the 70 mm cone by induction heating (max 120 °C) and the 150 mm cup with a press sleeve; at 3090 g a cocked ring brinells the raceway directly.
- The J-prefixed JH913848 code belongs to a metric-envelope inch family: its 70 mm bore is a round metric figure, yet the part still follows ABMA cone/cup numbering — do not substitute an ISO 355 metric 302/322 bearing of the same bore without checking OD, T and contact angle.
- 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.
- Open 4T-JH913848/JH913811 sets have no seals: a hub or gearbox needs external sealing or the 2,400 r/min grease figure is meaningless once water reaches the cone rib.
- Inch and metric bores collide on paper — 70 mm is 2.756 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- The 220/234 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JH913848/JH913811; 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-JH913848/JH913811?
4T-JH913848/JH913811 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 70 mm bore (2.756 in), 150 mm outside diameter and 41.275 mm assembled width T (5.906 × 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 3090 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JH913848/JH913811 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JH913848 cone or the JH913811 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-JH913848/JH913811 and a metric ISO 355 tapered bearing?
4T-JH913848/JH913811 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 70×150×41.275 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-JH913848/JH913811 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 JH913848/JH913811 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JH913848/JH913811 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-JH913848/JH913811 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.