46175-46368 bearing: complete specifications & equivalents
The 46175-46368 is a ANSI ABMA 19.2 radial bearing sized 44.45 x 93.662 x 31.75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 44.45 mm |
| Outer diameter D | 93.662 mm |
| Width B | 31.75 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 115 kN |
| Basic static load rating C0 | 131 kN |
| Limiting speed (mechanical) | 4100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1040 g |
| Manufacturer designation | NTN 4T-46175/46368 |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); 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 & 4t-inch-series range
| Bore d | 1.75 in |
|---|---|
| Outer diameter D | 3.687 in |
| Width B | 1.25 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 24.6 mm |
| Smallest bore in 4t-inch-series | 12.7 mm |
| Largest outer diameter in 4t-inch-series | 260 mm |
| Width range across 4t-inch-series | 10.998–77.788 mm |
| Bore position in 4t-inch-series (smallest first) | 51 of 148 |
| Bore above smallest 4t-inch-series size | 31.750000000000004 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 46175 | 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 46175-46368 model number is decoded
4T-46175/46368 belongs to the NTN inch 4T tapered roller range (pure-numeric inch family); cone and cup are ordered by their own references and are individually interchangeable with like-numbered parts. Cone and cup of 4T-46175/46368 are separately stocked parts: a worn 46368 cup can be replaced against the existing 46175 cone, provided the new cup carries the identical reference — pairing across references changes the 31.75 mm assembled width and the rating. The 2.6 kN of dynamic capacity per millimetre of bore summarises the 115 kN rating over the 44.45 mm bore — sanity-check any interchange candidate against this ratio and the 31.75 mm T. The printed 115/131 kN ratings belong to the assembled 46175+46368 pair; a sibling row using the same cone with a different cup carries its own rating row because the raceway track shifts with the cup. NTN grades inch 4T bearings as open bearings without integral seals; at 44.45 mm bore the application supplies sealing and the grease fill or oil feed.
Typical equipment & failure modes
Common applications
- agricultural tractor transmission and PTO shafts
- industrial gearboxes built to inch shafting
- construction-equipment pivot and wheel positions
- mining and quarry conveyor drive pulleys
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- flaking on one cone only when a bent shaft loads the O/X pair unevenly
- cup creep and housing fretting when the cup seat is cut too loose for the rotating load
- cage fatigue when the pair runs continuously near the grease limiting speed without oil cooling
- indentation of the raceways by hard particles in an open, unsealed arrangement
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 44.45 mm class are adjusted in pairs; verify end play against the axle or gearbox drawing and re-torque after bedding-in instead of trusting the first setting on 4T-46175/46368.
- The pure-numeric inch family at 44.45 mm bore (93.662×31.75 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 46175/46368 reference at purchase.
- Inch and metric bores collide on paper — 44.45 mm is 1.75 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Grease packs must leave free volume inside the 31.75 mm-wide set; over-greasing a pair churning near the oil-band speed of 5,500 r/min raises temperature and destroys the setting.
- Open 4T-46175/46368 sets have no seals: a hub or gearbox needs external sealing or the 4,100 r/min grease figure is meaningless once water reaches the cone rib.
- The 115/131 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-46175/46368; internal geometry legitimately differs between inch-series makers, so re-verify ratings, adjustment and the exact cone/cup references before substituting another brand on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-46175/46368?
4T-46175/46368 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 44.45 mm bore (1.75 in), 93.662 mm outside diameter and 31.75 mm assembled width T (3.687 × 1.25 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 115 kN, C0 131 kN, grease limiting speed 4,100 r/min, oil speed 5,500 r/min, mass about 1040 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-46175/46368 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 46175 cone or the 46368 cup can be replaced by an identical reference from NTN or another ABMA-dimensioned maker. Pairing the cone with a different cup reference is a different catalogue row: OD, assembled T and the 115/131 kN ratings change with the cup.
What is the difference between 4T-46175/46368 and a metric ISO 355 tapered bearing?
4T-46175/46368 follows the ABMA inch boundary plan with cone/cup references; ISO 355 bearings use metric dimension-series numbers (302, 322, …). Even where a metric size looks close to 44.45×93.662×31.75 mm, the envelopes and contact angles differ — the two systems are not drop-in interchangeable; check every boundary value before substituting.
What does the 4T prefix on 4T-46175/46368 mean?
4T is NTN's tapered roller bearing quality mark, stamped on cone and cup in the factory. It identifies NTN's 4T programme and is not a dimension or variant code, so interchange lists quote the bare 46175/46368 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-46175/46368 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 4T-46175/46368 at 5,500 r/min because oil removes rib-contact heat better. Real limits still depend on pair adjustment, oil flow and cooling.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.