230-560BK bearing: complete specifications & equivalents
The 230-560BK is a ISO 15 radial bearing sized 560 x 820 x 195 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 560 mm |
| Outer diameter D | 820 mm |
| Width B | 195 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 5350 kN |
| Basic static load rating C0 | 10500 kN |
| Fatigue load limit Pu | 800 kN |
| Limiting speed (mechanical) | 350 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 340000 g |
| Manufacturer designation | NTN 230/560BK |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); 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 & 23000-series range
| Bore d | 22.047 in |
|---|---|
| Outer diameter D | 32.283 in |
| Width B | 7.677 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 130 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 1580 mm |
| Width range across 23000-series | 27–345 mm |
| Bore position in 23000-series (smallest first) | 34 of 46 |
| Bore above smallest 23000-series size | 490 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 230-560B | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23000-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 230-560B — mounting (adapter/withdrawal sleeve or tapered seat, drive-up) differs. Verify shaft arrangement. |
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 230-560BK model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 230/560BK denotes the 560 mm bore spherical roller bearing (5350 kN C / 10500 kN C0) in the 23000 series, the self-aligning choice for heavy combined load. Reading the full code: the number gives the 560×820 mm envelope, — names the cage/capacity execution, K marks the 1:12 tapered bore for adapter/withdrawal-sleeve mounting, and plain outer ring (no D1/W33 groove) completes the order number. Pu 800 kN is the catalogue fatigue load limit for 230/560BK, used in the adjusted-life equation at contaminated or partial-film conditions typical of mining and vibrating duty. The 130.0 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 195 mm-wide ring seats fully on both sides. Supply grease through the outer-ring feature during commissioning and at the calculated interval, rotating the 560 mm bore assembly by hand to distribute it across both rows.
Typical equipment & failure modes
Common applications
- large wind-turbine main-shaft arrangements
- steel-mill and heavy crusher main shafts
- mining shovel and dragline swing shafts
- cement-rotary-kiln support and trunnion rolls
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- cage damage when a mounting force is applied through the roller set instead of the ring face
- micro-pitting when the EHL film is thinner than the raceway composite roughness
- brinelling from static overload or a hammer blow during sleeve mounting
- brinelling from static overload or a hammer blow during sleeve mounting
Selection pitfalls — read before you substitute
- At 560 mm bore 230/560BK is normally mounted on adapter/withdrawal sleeves with hydraulic assistance; follow the NTN drive-up angle or oil-injection procedure — manual nut tightening cannot set the multi-tonne seating correctly.
- K and K30 are different tapers — K is 1:12 and K30 is 1:30 on the wide series; an adapter sleeve for one will not mount the other 560 mm bearing, and drive-up procedures differ.
- Self-aligning does not mean unlimited misalignment: beyond the catalogue angle the outer ring's spherical travel is exhausted and the 5350 kN rating no longer applies.
- The two roller rows must share load equally — a tilted spacer or unequal abutment on the 195 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- The D1/W33 groove only helps if the housing has a matching grease passage; mounting a grooved 230/560BK in a solid block with no port wastes the feature and leaves the centre rows under-lubricated.
- The 5350/10500 kN ratings, 800 kN Pu and 340000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 230/560BK (basic); another maker's same-envelope part revises internal geometry, so re-verify ratings and cage before substitution on vibrating or rated drives.
Frequently asked questions
What are the dimensions and catalogue data of 230/560BK?
230/560BK is an NTN double-row spherical roller bearing to ISO 15: 560 mm bore, 820 mm OD and 195 mm width (22.047 × 32.283 × 7.677 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 5350 kN, C0 10500 kN, Pu 800 kN, grease limiting speed 350 r/min, oil 450 r/min, mass about 340000 g. It is open, with pressed-steel cage (standard execution) and a 1:12 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K denotes a 1:12 tapered bore. 230/560BK mounts on an adapter sleeve (or tapered shaft seat) and is driven up to the specified residual clearance; its cylindrical-bore counterpart in the same envelope and ratings is 230/560B.
What do EA and EM mean on NTN spherical roller bearings?
EA is the NTN standard-capacity/high-capacity execution with a pressed sheet-steel window cage; EM is the high-capacity execution with a one-piece machined brass cage. Both use the optimised symmetric-roller design, but cage identity changes mass, speed behaviour and suitability for duties like vibrating screens, so they are separate order numbers. 230/560BK is the basic execution.
What do D1 and W33 mean on 230/560BK?
230/560BK is listed without a D1/W33 outer-ring groove in 2203E; lubrication is supplied from the ring sides. D1 (NTN spelling) and W33 add the annular groove plus holes and are ordered as distinct suffixed executions of the same envelope.
How much misalignment and axial load can 230/560BK take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 23000 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 5350 kN C / 10500 kN C0 — but sustained pure axial load is not recommended because it unloads one row.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.