JLM813049-JLM813010 bearing: complete specifications & equivalents
The JLM813049-JLM813010 is a ANSI ABMA 19.2 radial bearing sized 70 x 110 x 26 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 | 110 mm |
| Width B | 26 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 108 kN |
| Basic static load rating C0 | 150 kN |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 888 g |
| Manufacturer designation | NTN 4T-JLM813049/JLM813010 |
| 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 | 4.331 in |
| Width B | 1.024 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) | 88 of 148 |
| Bore above smallest 4t-inch-series size | 57.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JLM813049 | 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 JLM813049-JLM813010 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-JLM813049/JLM813010 denotes the JLM prefixed family of NTN inch tapered roller bearings — cone JLM813049 and cup JLM813010 delivered as a matched, separable pair of 70 mm bore and 110 mm outside diameter. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: JLM813049 identifies the cone of 70 mm (2.756 in) bore by catalogue lookup, and JLM813010 fixes the 110 mm OD. Two single-row inch sets are normally mounted as an adjusted O or X pair; the 26 mm T of each 4T-JLM813049/JLM813010 enters the spacer calculation, so the tolerance on assembled width matters as much as the bore fit. Cup-side note for JLM813010: within the JLM prefixed family tables the JLM813049 cone is listed against several cup options, and it is the cup that fixes the 110 mm OD and the 26 mm assembled width — quote the full JLM813049/JLM813010 pair, never the cone alone. With a rotating shaft a k5/m5 cone seat and an easy-push cup seat are typical practice for 4T-JLM813049/JLM813010; reverse the fit logic when the cup rotates.
Typical equipment & failure modes
Common applications
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
- heavy truck and bus drive-axle differentials
- plant gearboxes on inch-dimensioned shaft lines
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
- brinell marks on cone and cup raceways from impact during handling or hammer fitting
Selection pitfalls — read before you substitute
- Mount the 70 mm cone by induction heating (max 120 °C) and the 110 mm cup with a press sleeve; at 888 g a cocked ring brinells the raceway directly.
- The J-prefixed JLM813049 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.
- 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.
- Replacing one half of an adjusted pair without resetting end play negates the 26 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Shaft and housing fillets must clear the ring chamfers of JLM813049 and JLM813010; use undercut shoulders so the rings seat on the face, not on a radius.
- The 108/150 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JLM813049/JLM813010; 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-JLM813049/JLM813010?
4T-JLM813049/JLM813010 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 70 mm bore (2.756 in), 110 mm outside diameter and 26 mm assembled width T (4.331 × 1.024 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 108 kN, C0 150 kN, grease limiting speed 3,200 r/min, oil speed 4,200 r/min, mass about 888 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JLM813049/JLM813010 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JLM813049 cone or the JLM813010 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 108/150 kN ratings change with the cup.
What is the difference between 4T-JLM813049/JLM813010 and a metric ISO 355 tapered bearing?
4T-JLM813049/JLM813010 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 70×110×26 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-JLM813049/JLM813010 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 JLM813049/JLM813010 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JLM813049/JLM813010 list two speeds, 3,200 and 4,200 r/min?
The lower figure, 3,200 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-JLM813049/JLM813010 at 4,200 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.