M88048-M88010 bearing: complete specifications & equivalents
The M88048-M88010 is a ANSI ABMA 19.2 radial bearing sized 33.338 x 68.262 x 22.225 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 33.338 mm |
| Outer diameter D | 68.262 mm |
| Width B | 22.225 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 62.5 kN |
| Basic static load rating C0 | 71 kN |
| Limiting speed (mechanical) | 5700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 379 g |
| Manufacturer designation | NTN 4T-M88048/M88010 |
| 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 | 1.313 in |
|---|---|
| Outer diameter D | 2.687 in |
| Width B | 0.875 in |
| ISO bore code | 48 |
| Radial section height (D−d)/2 | 17.5 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) | 33 of 148 |
| Bore above smallest 4t-inch-series size | 20.638 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| M88048-010 | SKF | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
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 M88048-M88010 model number is decoded
4T-M88048/M88010 is an NTN inch-series single-row tapered roller bearing: a separable cone-and-cup pair on the ABMA inch boundary plan, 33.338×68.262×22.225 mm (assembled width T), for a shaft of about 33.338 mm (1.313 in). Reading the designation: 4T-M88048/M88010 follows the ABMA inch convention — the number before the slash is the cone (inner ring with roller set and cage), the number after the slash is the cup (outer ring), and the medium M family lettering ties the pair to its boundary plan. Selection: C 62.5 kN against C0 71 kN gives a C0/C ratio of 1.14 for the 33.338 mm bore; the pair is counted as one adjusted unit when checking L10 at the equivalent combined load. Cup-side note for M88010: within the medium M family tables the M88048 cone is listed against several cup options, and it is the cup that fixes the 68.262 mm OD and the 22.225 mm assembled width — quote the full M88048/M88010 pair, never the cone alone. A single-row tapered bearing reacts thrust in one direction only; 4T-M88048/M88010 is adjusted against a second bearing so the shaft is located in both directions.
Typical equipment & failure modes
Common applications
- truck and trailer axle hubs on inch-dimensioned axles
- agricultural tractor transmission and PTO shafts
- industrial gearboxes built to inch shafting
- construction-equipment pivot and wheel positions
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- false brinelling on a stationary pair exposed to vibration during transport or standby
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- cage fatigue when the pair runs continuously near the grease limiting speed without oil cooling
- rolling-contact fatigue spalling after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 33.338 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-M88048/M88010.
- The medium M family at 33.338 mm bore (68.262×22.225 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full M88048/M88010 reference at purchase.
- Quote the full M88048/M88010 pair at ordering: the M88048 cone also ships against sibling cups, and a cup from another reference changes the 22.225 mm assembled width and the rating.
- Open 4T-M88048/M88010 sets have no seals: a hub or gearbox needs external sealing or the 5,700 r/min grease figure is meaningless once water reaches the cone rib.
- Shaft and housing fillets must clear the ring chamfers of M88048 and M88010; use undercut shoulders so the rings seat on the face, not on a radius.
- The 62.5/71 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-M88048/M88010; 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-M88048/M88010?
4T-M88048/M88010 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 33.338 mm bore (1.313 in), 68.262 mm outside diameter and 22.225 mm assembled width T (2.687 × 0.875 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 62.5 kN, C0 71 kN, grease limiting speed 5,700 r/min, oil speed 7,500 r/min, mass about 379 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-M88048/M88010 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the M88048 cone or the M88010 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 62.5/71 kN ratings change with the cup.
What is the difference between 4T-M88048/M88010 and a metric ISO 355 tapered bearing?
4T-M88048/M88010 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 33.338×68.262×22.225 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-M88048/M88010 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 M88048/M88010 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-M88048/M88010 list two speeds, 5,700 and 7,500 r/min?
The lower figure, 5,700 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-M88048/M88010 at 7,500 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.