26883-26822 bearing: complete specifications & equivalents
The 26883-26822 is a ANSI ABMA 19.2 radial bearing sized 35 x 79.375 x 23.812 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 35 mm |
| Outer diameter D | 79.375 mm |
| Width B | 23.812 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 85 kN |
| Basic static load rating C0 | 97.5 kN |
| Limiting speed (mechanical) | 4800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 610 g |
| Manufacturer designation | NTN 4T-26883/26822 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 3.125 in |
| Width B | 0.937 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 22.2 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) | 37 of 148 |
| Bore above smallest 4t-inch-series size | 22.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 26883 | 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 26883-26822 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-26883/26822 denotes the pure-numeric inch family of NTN inch tapered roller bearings — cone 26883 and cup 26822 delivered as a matched, separable pair of 35 mm bore and 79.375 mm outside diameter. 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 — 26883 sits in the pure-numeric inch family. Catalogue mass of the 4T-26883/26822 cone-plus-cup set is 610 g; shaft and housing shoulders must carry that mass square to the axis during fitting. The printed 85/97.5 kN ratings belong to the assembled 26883+26822 pair; a sibling row using the same cone with a different cup carries its own rating row because the raceway track shifts with the cup. Mount the 35 mm cone with an induction heater (max 120 °C) and press the 79.375 mm cup with a sleeve; driving either ring through the rollers brinells the raceways.
Typical equipment & failure modes
Common applications
- construction-equipment pivot and wheel positions
- mining and quarry conveyor drive pulleys
- machine-tool headstocks on inch spindles
- pump and blower drive shafts with combined load
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
- water-induced pitting when the open bearing sees washdown without external seals
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 35 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-26883/26822.
- The pure-numeric inch family at 35 mm bore (79.375×23.812 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 26883/26822 reference at purchase.
- Shaft and housing fillets must clear the ring chamfers of 26883 and 26822; use undercut shoulders so the rings seat on the face, not on a radius.
- Do not confuse T (23.812 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- Shaft and housing fillets must clear the ring chamfers of 26883 and 26822; use undercut shoulders so the rings seat on the face, not on a radius.
- The 85/97.5 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-26883/26822; 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-26883/26822?
4T-26883/26822 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 35 mm bore (1.378 in), 79.375 mm outside diameter and 23.812 mm assembled width T (3.125 × 0.937 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 85 kN, C0 97.5 kN, grease limiting speed 4,800 r/min, oil speed 6,400 r/min, mass about 610 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-26883/26822 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 26883 cone or the 26822 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 85/97.5 kN ratings change with the cup.
What is the difference between 4T-26883/26822 and a metric ISO 355 tapered bearing?
4T-26883/26822 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 35×79.375×23.812 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-26883/26822 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 26883/26822 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-26883/26822 list two speeds, 4,800 and 6,400 r/min?
The lower figure, 4,800 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-26883/26822 at 6,400 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.