576-572 bearing: complete specifications & equivalents
The 576-572 is a ANSI ABMA 19.2 radial bearing sized 73.025 x 139.992 x 36.512 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 73.025 mm |
| Outer diameter D | 139.992 mm |
| Width B | 36.512 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 197 kN |
| Basic static load rating C0 | 265 kN |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2520 g |
| Manufacturer designation | NTN 4T-576/572 |
| 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 | 2.875 in |
|---|---|
| Outer diameter D | 5.511 in |
| Width B | 1.437 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 33.5 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) | 90 of 148 |
| Bore above smallest 4t-inch-series size | 60.325 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 576 | 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 576-572 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-576/572 denotes the pure-numeric inch family of NTN inch tapered roller bearings — cone 576 and cup 572 delivered as a matched, separable pair of 73.025 mm bore and 139.992 mm outside diameter. Reading the designation: 4T-576/572 follows the ABMA inch convention — the number before the slash is the cone (inner ring with roller set and cage), the number after the slash is the cup (outer ring), and the pure-numeric inch family lettering ties the pair to its boundary plan. The 2.7 kN of dynamic capacity per millimetre of bore summarises the 197 kN rating over the 73.025 mm bore — sanity-check any interchange candidate against this ratio and the 36.512 mm T. Housing fitment sequence for 4T-576/572: press the 572 cup square into the 139.992 mm seat first, then bring the 576 cone (on its 73.025 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. A single-row tapered bearing reacts thrust in one direction only; 4T-576/572 is adjusted against a second bearing so the shaft is located in both directions.
Typical equipment & failure modes
Common applications
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
- heavy truck and bus drive-axle differentials
- plant gearboxes on inch-dimensioned shaft lines
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- cup creep and housing fretting when the cup seat is cut too loose for the rotating load
- flaking on one cone only when a bent shaft loads the O/X pair unevenly
- 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 73.025 mm cone by induction heating (max 120 °C) and the 139.992 mm cup with a press sleeve; at 2520 g a cocked ring brinells the raceway directly.
- The pure-numeric inch family at 73.025 mm bore (139.992×36.512 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 576/572 reference at purchase.
- ABMA makes the 73.025×139.992 mm envelope interchangeable, not the ratings: NTN prints 197/265 kN for this execution and another make of the same number can differ in roller complement.
- Inch and metric bores collide on paper — 73.025 mm is 2.875 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Open 4T-576/572 sets have no seals: a hub or gearbox needs external sealing or the 2,600 r/min grease figure is meaningless once water reaches the cone rib.
- The 197/265 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-576/572; 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-576/572?
4T-576/572 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 73.025 mm bore (2.875 in), 139.992 mm outside diameter and 36.512 mm assembled width T (5.511 × 1.437 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 197 kN, C0 265 kN, grease limiting speed 2,600 r/min, oil speed 3,400 r/min, mass about 2520 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-576/572 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 576 cone or the 572 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 197/265 kN ratings change with the cup.
What is the difference between 4T-576/572 and a metric ISO 355 tapered bearing?
4T-576/572 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 73.025×139.992×36.512 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-576/572 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 576/572 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-576/572 list two speeds, 2,600 and 3,400 r/min?
The lower figure, 2,600 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-576/572 at 3,400 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.