395A-394A-NTN bearing: complete specifications & equivalents
The 395A-394A-NTN is a ANSI ABMA 19.2 radial bearing sized 66.675 x 110 x 22 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 66.675 mm |
| Outer diameter D | 110 mm |
| Width B | 22 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 | 120 kN |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 803 g |
| Manufacturer designation | NTN 4T-395A/394A |
| 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 | 2.625 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 0.866 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 21.7 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) | 84 of 148 |
| Bore above smallest 4t-inch-series size | 53.974999999999994 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 395A-394A | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
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 395A-394A-NTN model number is decoded
The NTN 2203E inch table prints 4T-395A/394A at 66.675 mm bore (2.625 in), 110 mm cup OD and 22 mm assembled T, with a grease limiting speed of 3,200 r/min and an oil ceiling of 4,300 r/min. The 4T prefix is NTN's tapered roller quality mark stamped on both parts; it is a brand mark, not a size code, so cross-references quote 395A/394A without it. The 21.7 mm radial section over the 66.675 mm bore positions the contact line of the pair; abutment shoulders and spacers are dimensioned from that geometry, not from the bore alone. Cup-side note for 394A: within the pure-numeric inch family tables the 395A cone is listed against several cup options, and it is the cup that fixes the 110 mm OD and the 22 mm assembled width — quote the full 395A/394A pair, never the cone alone. A single-row tapered bearing reacts thrust in one direction only; 4T-395A/394A is adjusted against a second bearing so the shaft is located in both directions.
Typical equipment & failure modes
Common applications
- paper-machine and calender roll supports
- off-highway and forestry machine axles
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- false brinelling on a stationary pair exposed to vibration during transport or standby
- cage fatigue when the pair runs continuously near the grease limiting speed without oil cooling
- brinell marks on cone and cup raceways from impact during handling or hammer fitting
Selection pitfalls — read before you substitute
- Mount the 66.675 mm cone by induction heating (max 120 °C) and the 110 mm cup with a press sleeve; at 803 g a cocked ring brinells the raceway directly.
- The pure-numeric inch family at 66.675 mm bore (110×22 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 395A/394A reference at purchase.
- Inch and metric bores collide on paper — 66.675 mm is 2.625 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Quote the full 395A/394A pair at ordering: the 395A cone also ships against sibling cups, and a cup from another reference changes the 22 mm assembled width and the rating.
- Quote the full 395A/394A pair at ordering: the 395A cone also ships against sibling cups, and a cup from another reference changes the 22 mm assembled width and the rating.
- The 99.5/120 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-395A/394A; 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-395A/394A?
4T-395A/394A is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 66.675 mm bore (2.625 in), 110 mm outside diameter and 22 mm assembled width T (4.331 × 0.866 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 99.5 kN, C0 120 kN, grease limiting speed 3,200 r/min, oil speed 4,300 r/min, mass about 803 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-395A/394A interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 395A cone or the 394A 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 99.5/120 kN ratings change with the cup.
What is the difference between 4T-395A/394A and a metric ISO 355 tapered bearing?
4T-395A/394A 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 66.675×110×22 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-395A/394A 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 395A/394A references; the 4T spelling is retained among this page's search aliases.
Why does 4T-395A/394A list two speeds, 3,200 and 4,300 r/min?
The lower figure, 3,200 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-395A/394A at 4,300 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.