T2ED050 bearing: complete specifications & equivalents
The T2ED050 is a ISO 355 radial bearing sized 50 x 100 x 36 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 50 mm |
| Outer diameter D | 100 mm |
| Width B | 36 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 167 kN |
| Basic static load rating C0 | 190 kN |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1300 g |
| Manufacturer designation | NTN T2ED050 |
| Standard | ISO 355 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); 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 & T2ED-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 1.417 in |
| ISO bore code | 50 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in T2ED-series | 50 mm |
| Largest outer diameter in T2ED-series | 100 mm |
| Width range across T2ED-series | 36–36 mm |
| Bore position in T2ED-series (smallest first) | 1 of 1 |
| Bore above smallest T2ED-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| T2ED050 | 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 T2ED050 model number is decoded
T2ED050 is a metric single-row tapered roller bearing in the NTN 4T programme: a pressed-steel cage guides profiled rollers between a separable cone and cup on the 50×100 mm ISO 355 envelope, with 36 mm overall assembled width T. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 2ED, which is the maker-neutral cross-reference for the 50×100 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. The 25.0 mm radial section carries the roller complement across the 50–100 mm envelope; section and contact angle differ between NTN metric families even at the same bore, so 302/322/323 are not drop-in swaps. Imperial cross-check for the drawing: 50×100×36 mm is 1.969 × 3.937 × 1.417 in; ISO 355 makes the envelope interchangeable but C/C0, 167/190 kN, is NTN-specific. Re-adjustment after bedding-in is standard practice: re-check end play once the paired T2ED050 arrangement has run in, because initial seat seating relaxes the set preload slightly.
Typical equipment & failure modes
Common applications
- axle final-drive and differential positions
- construction-equipment wheel and pivot hubs
- truck and bus wheel hubs in paired arrangements
- industrial gearbox and speed-reducer shafts
Known failure patterns
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- cage fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Hub and pinion bearings of this 50 mm bore class are commonly adjusted in pairs; verify end play against the axle drawing and re-torque after bedding-in rather than trusting the initial preload on T2ED050.
- The large-size ISO 355 tapered-roller family at 50 mm bore (100×36 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 5,100 r/min oil ceiling.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering T2ED050 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering T2ED050 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering T2ED050 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The 167/190 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for T2ED050 (ISO 355 2ED); internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN T2ED050?
T2ED050 is a metric 4T tapered roller bearing to ISO 355: 50 mm bore, 100 mm outside diameter and 36 mm assembled width T (1.969 × 3.937 × 1.417 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 167 kN, C0 190 kN (2203E prints no Pu for this size), grease limiting speed 3,800 r/min, oil speed 5,100 r/min, mass about 1300 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on T2ED050?
4T is NTN's tapered roller bearing brand mark, stamped on the cone and cup in the factory. It identifies the NTN 4T programme and is not a dimension, so the catalogue and this page list the bare ISO 355 number (T2ED050); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the T2ED050 designation encode the 50 mm bore and what is 2ED?
trailing dimension block 050 prints the 50 mm bore directly for this large-size T-code. The 100 mm OD and 36 mm assembled T follow the ISO 355 dimension-series plan. 2ED is the maker-neutral ISO 355 abbreviation for this dimension series (the same code other manufacturers print); 4T is NTN's own brand mark.
Why does T2ED050 list two speeds, 3,800 and 5,100 r/min?
The lower figure, 3,800 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates T2ED050 at 5,100 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on T2ED050 mean?
The T2/T4/T7-style code is NTN's large-size tapered roller designation within ISO 355; it identifies the dimension series and 50 mm bore directly, and remains an open 4T execution ordered under its own code.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.