T7FC080 bearing: complete specifications & equivalents
The T7FC080 is a ISO 355 radial bearing sized 80 x 160 x 45 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 80 mm |
| Outer diameter D | 160 mm |
| Width B | 45 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 238 kN |
| Basic static load rating C0 | 297 kN |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3920 g |
| Manufacturer designation | NTN T7FC080 |
| 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 | 3.15 in |
|---|---|
| Outer diameter D | 6.299 in |
| Width B | 1.772 in |
| ISO bore code | 80 |
| Radial section height (D−d)/2 | 40 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) | 6 of 6 |
| Bore above smallest T7FC-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| T7FC080 | 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 T7FC080 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number T7FC080 denotes the large-size ISO 355 tapered-roller family of metric tapered roller bearings, 80 mm bore, 160 mm outside diameter and 45 mm assembled width T (3.15 × 6.299 × 1.772 in) to the ISO 355 boundary plan. The trailing dimension block 080 prints the 80 mm bore directly for this large-size T-code under the ISO 355 numbering; the 45 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. The 40.0 mm radial section carries the roller complement across the 80–160 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. 2203E does not print a Pu fatigue load limit for T7FC080; life work for this size uses the 238/297 kN C/C0 pair directly. Mount the 80 mm-bore cone on the shaft first (induction heat, max 120 °C), fit the cup square in its housing, then set preload or end play; never drive the cup home through the rollers of T7FC080.
Typical equipment & failure modes
Common applications
- mineral-processing feeder and crusher auxiliaries
- marine winch and deck-machinery shafts
- paper-machine press-section rolls
- large agricultural and forestry machine axles
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Mount the 80 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 3920 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The large-size ISO 355 tapered-roller family at 80 mm bore (160×45 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 3,200 r/min oil ceiling.
- Grease packs must leave free volume in the 45 mm-wide set; over-greasing a paired bearing churning at the 3,200 r/min oil-band speed raises temperature and destroys the preload setting.
- Minimum load matters at high speed: an unloaded T7FC080 at a large fraction of 2,400 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded pair arrangements.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering T7FC080 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The 238/297 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for T7FC080 (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 T7FC080?
T7FC080 is a metric 4T tapered roller bearing to ISO 355: 80 mm bore, 160 mm outside diameter and 45 mm assembled width T (3.15 × 6.299 × 1.772 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 238 kN, C0 297 kN (2203E prints no Pu for this size), grease limiting speed 2,400 r/min, oil speed 3,200 r/min, mass about 3920 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on T7FC080?
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 (T7FC080); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the T7FC080 designation encode the 80 mm bore and what is 7FC?
trailing dimension block 080 prints the 80 mm bore directly for this large-size T-code. The 160 mm OD and 45 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 T7FC080 list two speeds, 2,400 and 3,200 r/min?
The lower figure, 2,400 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates T7FC080 at 3,200 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on T7FC080 mean?
The T2/T4/T7-style code is NTN's large-size tapered roller designation within ISO 355; it identifies the dimension series and 80 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.