596-592A bearing: complete specifications & equivalents
The 596-592A is a ANSI ABMA 19.2 radial bearing sized 85.725 x 152.4 x 39.688 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 85.725 mm |
| Outer diameter D | 152.4 mm |
| Width B | 39.688 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 199 kN |
| Basic static load rating C0 | 279 kN |
| Limiting speed (mechanical) | 2300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2900 g |
| Manufacturer designation | NTN 4T-596/592A |
| 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 | 3.375 in |
|---|---|
| Outer diameter D | 6 in |
| Width B | 1.563 in |
| ISO bore code | 96 |
| Radial section height (D−d)/2 | 33.3 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) | 104 of 148 |
| Bore above smallest 4t-inch-series size | 73.02499999999999 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 596 | 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 596-592A model number is decoded
NTN supplies this 3.375 in (85.725 mm) shaft position as 4T-596/592A: cone 596, cup 592A, profiled rollers and a pressed-steel cage, rated 199 kN basic dynamic and 279 kN static. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: 596 identifies the cone of 85.725 mm (3.375 in) bore by catalogue lookup, and 592A fixes the 152.4 mm OD. Speed planning uses both catalogue columns: grease 2,300 r/min is the mechanical ceiling for 4T-596/592A, oil 3,100 r/min with circulating oil — a 800 r/min margin at this size. Cup-side note for 592A: within the pure-numeric inch family tables the 596 cone is listed against several cup options, and it is the cup that fixes the 152.4 mm OD and the 39.688 mm assembled width — quote the full 596/592A pair, never the cone alone. After bedding-in, re-check the end play of the adjusted 4T-596/592A pair — initial seating of the ring faces relaxes the setting slightly.
Typical equipment & failure modes
Common applications
- large conveyor head pulleys in bulk-handling plant
- paper-machine and calender roll supports
- off-highway and forestry machine axles
- marine winch and deck-machinery shafts
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- 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 damage from a mounting blow transmitted through the roller complement
- rolling-contact fatigue spalling after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- Mount the 85.725 mm cone by induction heating (max 120 °C) and the 152.4 mm cup with a press sleeve; at 2900 g a cocked ring brinells the raceway directly.
- The pure-numeric inch family at 85.725 mm bore (152.4×39.688 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 596/592A reference at purchase.
- An unloaded 4T-596/592A near 2,300 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded high-speed pairs.
- Inch and metric bores collide on paper — 85.725 mm is 3.375 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Replacing one half of an adjusted pair without resetting end play negates the 39.688 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- The 199/279 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-596/592A; 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-596/592A?
4T-596/592A is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 85.725 mm bore (3.375 in), 152.4 mm outside diameter and 39.688 mm assembled width T (6 × 1.563 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 199 kN, C0 279 kN, grease limiting speed 2,300 r/min, oil speed 3,100 r/min, mass about 2900 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-596/592A interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 596 cone or the 592A 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 199/279 kN ratings change with the cup.
What is the difference between 4T-596/592A and a metric ISO 355 tapered bearing?
4T-596/592A 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 85.725×152.4×39.688 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-596/592A 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 596/592A references; the 4T spelling is retained among this page's search aliases.
Why does 4T-596/592A list two speeds, 2,300 and 3,100 r/min?
The lower figure, 2,300 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-596/592A at 3,100 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.