LM67048-LM67010 bearing: complete specifications & equivalents
The LM67048-LM67010 is a ANSI ABMA 19.2 radial bearing sized 31.75 x 59.131 x 15.875 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 31.75 mm |
| Outer diameter D | 59.131 mm |
| Width B | 15.875 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 38.5 kN |
| Basic static load rating C0 | 41 kN |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 183 g |
| Manufacturer designation | NTN 4T-LM67048/LM67010 |
| 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 | 1.25 in |
|---|---|
| Outer diameter D | 2.328 in |
| Width B | 0.625 in |
| ISO bore code | 48 |
| Radial section height (D−d)/2 | 13.7 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) | 32 of 148 |
| Bore above smallest 4t-inch-series size | 19.05 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| LM67048-010 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 31.75×59.131×15.875 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 LM67048-LM67010 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-LM67048/LM67010 denotes the light-medium LM family of NTN inch tapered roller bearings — cone LM67048 and cup LM67010 delivered as a matched, separable pair of 31.75 mm bore and 59.131 mm outside diameter. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: LM67048 identifies the cone of 31.75 mm (1.25 in) bore by catalogue lookup, and LM67010 fixes the 59.131 mm OD. Selection: C 38.5 kN against C0 41 kN gives a C0/C ratio of 1.06 for the 31.75 mm bore; the pair is counted as one adjusted unit when checking L10 at the equivalent combined load. Housing fitment sequence for 4T-LM67048/LM67010: press the LM67010 cup square into the 59.131 mm seat first, then bring the LM67048 cone (on its 31.75 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. Contact-pattern check with marking blue: a pattern biased to one roller end means the 31.75 mm pair is misadjusted and the set will edge-load in service.
Typical equipment & failure modes
Common applications
- pump and blower drive shafts with combined load
- truck and trailer axle hubs on inch-dimensioned axles
- agricultural tractor transmission and PTO shafts
- industrial gearboxes built to inch shafting
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
- 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 31.75 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-LM67048/LM67010.
- The light-medium LM family at 31.75 mm bore (59.131×15.875 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full LM67048/LM67010 reference at purchase.
- Inch and metric bores collide on paper — 31.75 mm is 1.25 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Quote the full LM67048/LM67010 pair at ordering: the LM67048 cone also ships against sibling cups, and a cup from another reference changes the 15.875 mm assembled width and the rating.
- Do not confuse T (15.875 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- The 38.5/41 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-LM67048/LM67010; 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-LM67048/LM67010?
4T-LM67048/LM67010 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 31.75 mm bore (1.25 in), 59.131 mm outside diameter and 15.875 mm assembled width T (2.328 × 0.625 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 38.5 kN, C0 41 kN, grease limiting speed 6,300 r/min, oil speed 8,400 r/min, mass about 183 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-LM67048/LM67010 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the LM67048 cone or the LM67010 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 38.5/41 kN ratings change with the cup.
What is the difference between 4T-LM67048/LM67010 and a metric ISO 355 tapered bearing?
4T-LM67048/LM67010 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 31.75×59.131×15.875 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-LM67048/LM67010 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 LM67048/LM67010 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-LM67048/LM67010 list two speeds, 6,300 and 8,400 r/min?
The lower figure, 6,300 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-LM67048/LM67010 at 8,400 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.