JM718149-JM718110 bearing: complete specifications & equivalents
The JM718149-JM718110 is a ANSI ABMA 19.2 radial bearing sized 90 x 145 x 35 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 90 mm |
| Outer diameter D | 145 mm |
| Width B | 35 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 210 kN |
| Basic static load rating C0 | 279 kN |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2140 g |
| Manufacturer designation | NTN 4T-JM718149/JM718110 |
| 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 | 3.543 in |
|---|---|
| Outer diameter D | 5.709 in |
| Width B | 1.378 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) | 108 of 148 |
| Bore above smallest 4t-inch-series size | 77.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JM718149 | 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 JM718149-JM718110 model number is decoded
4T-JM718149/JM718110 is an NTN inch-series single-row tapered roller bearing: a separable cone-and-cup pair on the ABMA inch boundary plan, 90×145×35 mm (assembled width T), for a shaft of about 90 mm (3.543 in). Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: JM718149 identifies the cone of 90 mm (3.543 in) bore by catalogue lookup, and JM718110 fixes the 145 mm OD. Catalogue mass of the 4T-JM718149/JM718110 cone-plus-cup set is 2140 g; shaft and housing shoulders must carry that mass square to the axis during fitting. Housing fitment sequence for 4T-JM718149/JM718110: press the JM718110 cup square into the 145 mm seat first, then bring the JM718149 cone (on its 90 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-JM718149/JM718110 pair — initial seating of the ring faces relaxes the setting slightly.
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
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- false brinelling on a stationary pair exposed to vibration during transport or standby
- cage fatigue when the pair runs continuously near the grease limiting speed without oil cooling
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Mount the 90 mm cone by induction heating (max 120 °C) and the 145 mm cup with a press sleeve; at 2140 g a cocked ring brinells the raceway directly.
- The J-prefixed JM718149 code belongs to a metric-envelope inch family: its 90 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 (35 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- Shaft and housing fillets must clear the ring chamfers of JM718149 and JM718110; use undercut shoulders so the rings seat on the face, not on a radius.
- Grease packs must leave free volume inside the 35 mm-wide set; over-greasing a pair churning near the oil-band speed of 3,200 r/min raises temperature and destroys the setting.
- The 210/279 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JM718149/JM718110; 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-JM718149/JM718110?
4T-JM718149/JM718110 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 90 mm bore (3.543 in), 145 mm outside diameter and 35 mm assembled width T (5.709 × 1.378 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 210 kN, C0 279 kN, grease limiting speed 2,400 r/min, oil speed 3,200 r/min, mass about 2140 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JM718149/JM718110 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JM718149 cone or the JM718110 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 210/279 kN ratings change with the cup.
What is the difference between 4T-JM718149/JM718110 and a metric ISO 355 tapered bearing?
4T-JM718149/JM718110 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 90×145×35 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-JM718149/JM718110 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 JM718149/JM718110 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JM718149/JM718110 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-JM718149/JM718110 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.