JLM714149-JLM714110 bearing: complete specifications & equivalents
The JLM714149-JLM714110 is a ANSI ABMA 19.2 radial bearing sized 75 x 115 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 75 mm |
| Outer diameter D | 115 mm |
| Width B | 25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 105 kN |
| Basic static load rating C0 | 143 kN |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 880 g |
| Manufacturer designation | NTN 4T-JLM714149/JLM714110 |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 4.528 in |
| Width B | 0.984 in |
| ISO bore code | 49 |
| Radial section height (D−d)/2 | 20 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) | 93 of 148 |
| Bore above smallest 4t-inch-series size | 62.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JLM714149 | 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 JLM714149-JLM714110 model number is decoded
The NTN 2203E inch table prints 4T-JLM714149/JLM714110 at 75 mm bore (2.953 in), 115 mm cup OD and 25 mm assembled T, with a grease limiting speed of 3,000 r/min and an oil ceiling of 4,000 r/min. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: JLM714149 identifies the cone of 75 mm (2.953 in) bore by catalogue lookup, and JLM714110 fixes the 115 mm OD. The 1.4 kN of dynamic capacity per millimetre of bore summarises the 105 kN rating over the 75 mm bore — sanity-check any interchange candidate against this ratio and the 25 mm T. Cup-side note for JLM714110: within the JLM prefixed family tables the JLM714149 cone is listed against several cup options, and it is the cup that fixes the 115 mm OD and the 25 mm assembled width — quote the full JLM714149/JLM714110 pair, never the cone alone. Fillet radii must clear the chamfers of the JLM714149 cone and JLM714110 cup; undercut shoulders seat the rings fully instead of bridging on a radius.
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
- 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
- brinell marks on cone and cup raceways from impact during handling or hammer fitting
Selection pitfalls — read before you substitute
- Mount the 75 mm cone by induction heating (max 120 °C) and the 115 mm cup with a press sleeve; at 880 g a cocked ring brinells the raceway directly.
- The J-prefixed JLM714149 code belongs to a metric-envelope inch family: its 75 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.
- Never drive the 115 mm cup home through the rollers: fitting force goes through the ring faces only, or brinell marks release as noise within the first running hours.
- Shaft and housing fillets must clear the ring chamfers of JLM714149 and JLM714110; use undercut shoulders so the rings seat on the face, not on a radius.
- Open 4T-JLM714149/JLM714110 sets have no seals: a hub or gearbox needs external sealing or the 3,000 r/min grease figure is meaningless once water reaches the cone rib.
- The 105/143 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JLM714149/JLM714110; 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-JLM714149/JLM714110?
4T-JLM714149/JLM714110 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 75 mm bore (2.953 in), 115 mm outside diameter and 25 mm assembled width T (4.528 × 0.984 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 105 kN, C0 143 kN, grease limiting speed 3,000 r/min, oil speed 4,000 r/min, mass about 880 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JLM714149/JLM714110 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JLM714149 cone or the JLM714110 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 105/143 kN ratings change with the cup.
What is the difference between 4T-JLM714149/JLM714110 and a metric ISO 355 tapered bearing?
4T-JLM714149/JLM714110 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 75×115×25 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-JLM714149/JLM714110 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 JLM714149/JLM714110 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JLM714149/JLM714110 list two speeds, 3,000 and 4,000 r/min?
The lower figure, 3,000 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-JLM714149/JLM714110 at 4,000 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.