T2EE040 bearing: complete specifications & equivalents
The T2EE040 is a ISO 355 radial bearing sized 40 x 85 x 33 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 40 mm |
| Outer diameter D | 85 mm |
| Width B | 33 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 131 kN |
| Basic static load rating C0 | 144 kN |
| Limiting speed (mechanical) | 4600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 905 g |
| Manufacturer designation | NTN T2EE040 |
| 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 & T2EE-series range
| Bore d | 1.575 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 1.299 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 22.5 mm |
| Smallest bore in T2EE-series | 40 mm |
| Largest outer diameter in T2EE-series | 115 mm |
| Width range across T2EE-series | 33–40 mm |
| Bore position in T2EE-series (smallest first) | 1 of 2 |
| Bore above smallest T2EE-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| T2EE040 | 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 T2EE040 model number is decoded
NTN supplies this 40 mm bore tapered roller position as T2EE040: one cone assembly, one cup, line-contact rollers and a steel cage, rated 131 kN basic dynamic and 144 kN static on the large-size ISO 355 tapered-roller family. Digit by digit, the bare number identifies the large-size ISO 355 tapered-roller family and a bore code resolving to 40 mm; 85 mm OD and 33 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. The 22.5 mm radial section carries the roller complement across the 40–85 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. The two speed columns differ by a factor of .74 (grease/limiting 4,600 vs oil 6,200 r/min); heat generation at the cone rib decides which lubrication a real T2EE040 arrangement can sustain. After mounting check the contact pattern with marking blue: a pattern biased to the large or small roller end means the 40 mm pair is misadjusted and the 33 mm T set will edge-load in service.
Typical equipment & failure modes
Common applications
- pump and compressor drive shafts carrying combined load
- machine-tool gearbox and headstock shafts
- axle final-drive and differential positions
- construction-equipment wheel and pivot hubs
Known failure patterns
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- cage fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- false brinelling on a stationary paired set exposed to external vibration
Selection pitfalls — read before you substitute
- Hub and pinion bearings of this 40 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 T2EE040.
- The large-size ISO 355 tapered-roller family at 40 mm bore (85×33 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 6,200 r/min oil ceiling.
- Open T2EE040 units have no seals: a wheel-hub or gearbox application needs external sealing or the 4,600 r/min grease figure is meaningless once water reaches the cone rib.
- Grease packs must leave free volume in the 33 mm-wide set; over-greasing a paired bearing churning at the 6,200 r/min oil-band speed raises temperature and destroys the preload setting.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering T2EE040 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The 131/144 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for T2EE040 (ISO 355 2EE); 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 T2EE040?
T2EE040 is a metric 4T tapered roller bearing to ISO 355: 40 mm bore, 85 mm outside diameter and 33 mm assembled width T (1.575 × 3.346 × 1.299 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 131 kN, C0 144 kN (2203E prints no Pu for this size), grease limiting speed 4,600 r/min, oil speed 6,200 r/min, mass about 905 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on T2EE040?
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 (T2EE040); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the T2EE040 designation encode the 40 mm bore and what is 2EE?
trailing dimension block 040 prints the 40 mm bore directly for this large-size T-code. The 85 mm OD and 33 mm assembled T follow the ISO 355 dimension-series plan. 2EE 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 T2EE040 list two speeds, 4,600 and 6,200 r/min?
The lower figure, 4,600 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates T2EE040 at 6,200 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on T2EE040 mean?
The T2/T4/T7-style code is NTN's large-size tapered roller designation within ISO 355; it identifies the dimension series and 40 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.