T7FC045 bearing: complete specifications & equivalents
The T7FC045 is a ISO 355 radial bearing sized 45 x 95 x 29 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 45 mm |
| Outer diameter D | 95 mm |
| Width B | 29 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 99.5 kN |
| Basic static load rating C0 | 108 kN |
| Limiting speed (mechanical) | 4100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 907 g |
| Manufacturer designation | NTN T7FC045 |
| 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 & T7FC-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 3.74 in |
| Width B | 1.142 in |
| ISO bore code | 45 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in T7FC-series | 45 mm |
| Largest outer diameter in T7FC-series | 160 mm |
| Width range across T7FC-series | 29–45 mm |
| Bore position in T7FC-series (smallest first) | 1 of 6 |
| Bore above smallest T7FC-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| T7FC045 | 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 T7FC045 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number T7FC045 denotes the large-size ISO 355 tapered-roller family of metric tapered roller bearings, 45 mm bore, 95 mm outside diameter and 29 mm assembled width T (1.772 × 3.74 × 1.142 in) to the ISO 355 boundary plan. Digit by digit, the bare number identifies the large-size ISO 355 tapered-roller family and a bore code resolving to 45 mm; 95 mm OD and 29 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. NTN adjusts these bearings by cup or cone position rather than shipping a preloaded set; the mounting drawing must state end play or preload for T7FC045, since running clearance is set during assembly. The 2.2 kN-per-mm-bore capacity figure for T7FC045 summarises the 99.5 kN rating over 45 mm bore; use it to sanity-check an interchange candidate before swapping brands. After mounting check the contact pattern with marking blue: a pattern biased to the large or small roller end means the 45 mm pair is misadjusted and the 29 mm T set will edge-load in service.
Typical equipment & failure modes
Common applications
- bevel and helical pinion drives with high thrust component
- pump and compressor drive shafts carrying combined load
- machine-tool gearbox and headstock shafts
- axle final-drive and differential positions
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
- indentation of the raceways by hard particles in unsealed open arrangements
Selection pitfalls — read before you substitute
- Hub and pinion bearings of this 45 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 T7FC045.
- The large-size ISO 355 tapered-roller family at 45 mm bore (95×29 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 5,500 r/min oil ceiling.
- Grease packs must leave free volume in the 29 mm-wide set; over-greasing a paired bearing churning at the 5,500 r/min oil-band speed raises temperature and destroys the preload setting.
- Back-to-back and face-to-face arrangements react differently to shaft bending: pick the pair orientation for the moment load before locking the 45 mm shoulder geometry, because retrofitting flips the cups.
- On slash-size and T-code bearings confirm the full code on both cone and cup before fitting: the 45 mm bore alone does not identify the cup, and a mismatched cone/cup set has no catalogue rating.
- The 99.5/108 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for T7FC045 (ISO 355 7FC); 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 T7FC045?
T7FC045 is a metric 4T tapered roller bearing to ISO 355: 45 mm bore, 95 mm outside diameter and 29 mm assembled width T (1.772 × 3.74 × 1.142 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 99.5 kN, C0 108 kN (2203E prints no Pu for this size), grease limiting speed 4,100 r/min, oil speed 5,500 r/min, mass about 907 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on T7FC045?
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 (T7FC045); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the T7FC045 designation encode the 45 mm bore and what is 7FC?
trailing dimension block 045 prints the 45 mm bore directly for this large-size T-code. The 95 mm OD and 29 mm assembled T follow the ISO 355 dimension-series plan. 7FC 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 T7FC045 list two speeds, 4,100 and 5,500 r/min?
The lower figure, 4,100 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates T7FC045 at 5,500 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on T7FC045 mean?
The T2/T4/T7-style code is NTN's large-size tapered roller designation within ISO 355; it identifies the dimension series and 45 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.