32219U bearing: complete specifications & equivalents
The 32219U is a ISO 355 radial bearing sized 95 x 170 x 45.5 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 95 mm |
| Outer diameter D | 170 mm |
| Width B | 45.5 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 330 kN |
| Basic static load rating C0 | 415 kN |
| Fatigue load limit Pu | 47 kN |
| Limiting speed (mechanical) | 2100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4290 g |
| Manufacturer designation | NTN 32219U |
| 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 & 32200-series range
| Bore d | 3.74 in |
|---|---|
| Outer diameter D | 6.693 in |
| Width B | 1.791 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in 32200-series | 17 mm |
| Largest outer diameter in 32200-series | 580 mm |
| Width range across 32200-series | 17.25–159 mm |
| Bore position in 32200-series (smallest first) | 18 of 36 |
| Bore above smallest 32200-series size | 78 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32219U | 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 32219U model number is decoded
For a 95 mm shaft with a thrust component, NTN lists 32219U, a metric 4T tapered roller bearing of 330 kN C and 415 kN C0 inside the 170 mm OD, 45.5 mm-wide assembled set. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 3FC, which is the maker-neutral cross-reference for the 95×170 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. The rollers run with their large ends against the cone's integral guide rib; the rib/end-flange contact carries the thrust component and is the reason lubricant must reach the rib face of 32219U, not only the raceway. Speed planning uses both catalogue columns: grease 2,100 r/min is the cage/rib mechanical ceiling for 32219U, oil 2,800 r/min is available with circulating oil — a 700 r/min margin at this size. Re-adjustment after bedding-in is standard practice: re-check end play once the paired 32219U arrangement has run in, because initial seat seating relaxes the set preload slightly.
Typical equipment & failure modes
Common applications
- marine winch and deck-machinery shafts
- paper-machine press-section rolls
- large agricultural and forestry machine axles
- heavy industrial gearboxes and crane travel drives
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- 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
- Mount the 95 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 4290 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The heavy-section 32200 family at 95 mm bore (170×45.5 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 2,800 r/min oil ceiling.
- ISO 355 makes the 95×170 mm envelope interchangeable but not the ratings: NTN prints 330/415 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- Do not confuse T (45.5 mm assembled width of cone + cup) with the cone width when drawing spacers; an abutment sized to T instead of the ring width leaves the cup unseated.
- Back-to-back and face-to-face arrangements react differently to shaft bending: pick the pair orientation for the moment load before locking the 95 mm shoulder geometry, because retrofitting flips the cups.
- The 330/415 kN ratings and 47 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32219U (ISO 355 3FC); 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 32219U?
32219U is a metric 4T tapered roller bearing to ISO 355: 95 mm bore, 170 mm outside diameter and 45.5 mm assembled width T (3.74 × 6.693 × 1.791 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 330 kN, C0 415 kN, Pu 47 kN, grease limiting speed 2,100 r/min, oil speed 2,800 r/min, mass about 4290 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32219U?
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 (32219U); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32219U designation encode the 95 mm bore and what is 3FC?
last two digits 19 are the ISO bore code, ×5 = 95 mm (codes 00–03 use the 10/12/15/17 exception table). The 170 mm OD and 45.5 mm assembled T follow the ISO 355 dimension-series plan. 3FC 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 32219U list two speeds, 2,100 and 2,800 r/min?
The lower figure, 2,100 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32219U at 2,800 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32219U mean?
Suffix reading on 32219U: U marks the reinforced/uprated internal design of the bare number, a separate order number with higher load capacity than the basic execution; the suffix is part of the order number and the variants are not interchangeable articles.
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.