JHM516849-JHM516810 bearing: complete specifications & equivalents
The JHM516849-JHM516810 is a ANSI ABMA 19.2 radial bearing sized 85 x 140 x 39 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 85 mm |
| Outer diameter D | 140 mm |
| Width B | 39 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 218 kN |
| Basic static load rating C0 | 297 kN |
| Limiting speed (mechanical) | 2500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2300 g |
| Manufacturer designation | NTN 4T-JHM516849/JHM516810 |
| 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 | 3.346 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.535 in |
| ISO bore code | 49 |
| Radial section height (D−d)/2 | 27.5 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) | 102 of 148 |
| Bore above smallest 4t-inch-series size | 72.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JHM516849 | 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 JHM516849-JHM516810 model number is decoded
4T-JHM516849/JHM516810 belongs to the NTN inch 4T tapered roller range (JHM heavy metric-envelope family); cone and cup are ordered by their own references and are individually interchangeable with like-numbered parts. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: JHM516849 identifies the cone of 85 mm (3.346 in) bore by catalogue lookup, and JHM516810 fixes the 140 mm OD. The 27.5 mm radial section over the 85 mm bore positions the contact line of the pair; abutment shoulders and spacers are dimensioned from that geometry, not from the bore alone. Cup-side note for JHM516810: within the JHM heavy metric-envelope family tables the JHM516849 cone is listed against several cup options, and it is the cup that fixes the 140 mm OD and the 39 mm assembled width — quote the full JHM516849/JHM516810 pair, never the cone alone. Mount the 85 mm cone with an induction heater (max 120 °C) and press the 140 mm cup with a sleeve; driving either ring through the rollers brinells the raceways.
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
- 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
- brinell marks on cone and cup raceways from impact during handling or hammer fitting
Selection pitfalls — read before you substitute
- Mount the 85 mm cone by induction heating (max 120 °C) and the 140 mm cup with a press sleeve; at 2300 g a cocked ring brinells the raceway directly.
- The J-prefixed JHM516849 code belongs to a metric-envelope inch family: its 85 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.
- ABMA makes the 85×140 mm envelope interchangeable, not the ratings: NTN prints 218/297 kN for this execution and another make of the same number can differ in roller complement.
- Grease packs must leave free volume inside the 39 mm-wide set; over-greasing a pair churning near the oil-band speed of 3,400 r/min raises temperature and destroys the setting.
- Fit selection follows the rotating ring: a rotating cone on a 85 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- The 218/297 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JHM516849/JHM516810; 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-JHM516849/JHM516810?
4T-JHM516849/JHM516810 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 85 mm bore (3.346 in), 140 mm outside diameter and 39 mm assembled width T (5.512 × 1.535 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 218 kN, C0 297 kN, grease limiting speed 2,500 r/min, oil speed 3,400 r/min, mass about 2300 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JHM516849/JHM516810 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JHM516849 cone or the JHM516810 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 218/297 kN ratings change with the cup.
What is the difference between 4T-JHM516849/JHM516810 and a metric ISO 355 tapered bearing?
4T-JHM516849/JHM516810 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 85×140×39 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-JHM516849/JHM516810 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 JHM516849/JHM516810 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JHM516849/JHM516810 list two speeds, 2,500 and 3,400 r/min?
The lower figure, 2,500 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-JHM516849/JHM516810 at 3,400 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.