15116-15245 bearing: complete specifications & equivalents
The 15116-15245 is a ANSI ABMA 19.2 radial bearing sized 30.112 x 62 x 19.05 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 30.112 mm |
| Outer diameter D | 62 mm |
| Width B | 19.05 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 52 kN |
| Basic static load rating C0 | 54 kN |
| Limiting speed (mechanical) | 6100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 270 g |
| Manufacturer designation | NTN 4T-15116/15245 |
| 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 | 1.186 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.75 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 15.9 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) | 28 of 148 |
| Bore above smallest 4t-inch-series size | 17.412 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 15116 | 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 15116-15245 model number is decoded
For an inch shaft of 30.112 mm carrying combined radial and thrust load, NTN lists 4T-15116/15245, a single-row 4T tapered roller set of 52 kN C and 54 kN C0 inside the 62 mm OD cup. Letter prefixes inherited from the inch convention mark the load family: LM reads as light-medium, HM as heavy-medium, LL as extra-light, J-prefixed codes as metric-envelope families — 15116 sits in the pure-numeric inch family. Imperial cross-check for the drawing: 30.112×62×19.05 mm converts to 1.186 × 2.441 × 0.75 in; the ABMA envelope swaps with like-numbered inch parts but the 52/54 kN ratings are NTN-specific. Housing fitment sequence for 4T-15116/15245: press the 15245 cup square into the 62 mm seat first, then bring the 15116 cone (on its 30.112 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. Running clearance of 4T-15116/15245 is set at mounting by axial displacement of cone or cup — the catalogue does not ship a preloaded set, so the drawing must state end play or preload.
Typical equipment & failure modes
Common applications
- industrial gearboxes built to inch shafting
- construction-equipment pivot and wheel positions
- mining and quarry conveyor drive pulleys
- machine-tool headstocks on inch spindles
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
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- edge loading when shaft deflection exceeds the few arc-minutes an adjusted pair tolerates
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 30.112 mm class are adjusted in pairs; verify end play against the axle or gearbox drawing and re-torque after bedding-in instead of trusting the first setting on 4T-15116/15245.
- The pure-numeric inch family at 30.112 mm bore (62×19.05 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 15116/15245 reference at purchase.
- Replacing one half of an adjusted pair without resetting end play negates the 19.05 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Fit selection follows the rotating ring: a rotating cone on a 30.112 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- Do not confuse T (19.05 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- The 52/54 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-15116/15245; 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-15116/15245?
4T-15116/15245 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 30.112 mm bore (1.186 in), 62 mm outside diameter and 19.05 mm assembled width T (2.441 × 0.75 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 52 kN, C0 54 kN, grease limiting speed 6,100 r/min, oil speed 8,200 r/min, mass about 270 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-15116/15245 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 15116 cone or the 15245 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 52/54 kN ratings change with the cup.
What is the difference between 4T-15116/15245 and a metric ISO 355 tapered bearing?
4T-15116/15245 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 30.112×62×19.05 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-15116/15245 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 15116/15245 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-15116/15245 list two speeds, 6,100 and 8,200 r/min?
The lower figure, 6,100 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-15116/15245 at 8,200 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.