560S-552A bearing: complete specifications & equivalents
The 560S-552A is a ANSI ABMA 19.2 radial bearing sized 68.262 x 123.825 x 38.1 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 68.262 mm |
| Outer diameter D | 123.825 mm |
| Width B | 38.1 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 175 kN |
| Basic static load rating C0 | 216 kN |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1870 g |
| Manufacturer designation | NTN 4T-560S/552A |
| 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 | 2.687 in |
|---|---|
| Outer diameter D | 4.875 in |
| Width B | 1.5 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 27.8 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) | 85 of 148 |
| Bore above smallest 4t-inch-series size | 55.562 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 560S | 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 560S-552A model number is decoded
NTN supplies this 2.687 in (68.262 mm) shaft position as 4T-560S/552A: cone 560S, cup 552A, profiled rollers and a pressed-steel cage, rated 175 kN basic dynamic and 216 kN static. Reading the designation: 4T-560S/552A 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 27.8 mm radial section over the 68.262 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 552A: within the pure-numeric inch family tables the 560S cone is listed against several cup options, and it is the cup that fixes the 123.825 mm OD and the 38.1 mm assembled width — quote the full 560S/552A pair, never the cone alone. Minimum load matters at speed: an unloaded 4T-560S/552A run near 3,000 r/min lets the rollers skid; lightly spring-preload high-speed pair arrangements.
Typical equipment & failure modes
Common applications
- off-highway and forestry machine axles
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
- heavy truck and bus drive-axle differentials
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 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 68.262 mm cone by induction heating (max 120 °C) and the 123.825 mm cup with a press sleeve; at 1870 g a cocked ring brinells the raceway directly.
- The pure-numeric inch family at 68.262 mm bore (123.825×38.1 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 560S/552A reference at purchase.
- Inch and metric bores collide on paper — 68.262 mm is 2.687 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Open 4T-560S/552A sets have no seals: a hub or gearbox needs external sealing or the 3,000 r/min grease figure is meaningless once water reaches the cone rib.
- Open 4T-560S/552A sets have no seals: a hub or gearbox needs external sealing or the 3,000 r/min grease figure is meaningless once water reaches the cone rib.
- The 175/216 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-560S/552A; 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-560S/552A?
4T-560S/552A is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 68.262 mm bore (2.687 in), 123.825 mm outside diameter and 38.1 mm assembled width T (4.875 × 1.5 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 175 kN, C0 216 kN, grease limiting speed 3,000 r/min, oil speed 4,100 r/min, mass about 1870 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-560S/552A interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 560S cone or the 552A 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 175/216 kN ratings change with the cup.
What is the difference between 4T-560S/552A and a metric ISO 355 tapered bearing?
4T-560S/552A 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 68.262×123.825×38.1 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-560S/552A 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 560S/552A references; the 4T spelling is retained among this page's search aliases.
Why does 4T-560S/552A list two speeds, 3,000 and 4,100 r/min?
The lower figure, 3,000 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-560S/552A at 4,100 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.