240-560B bearing: complete specifications & equivalents
The 240-560B is a ISO 15 radial bearing sized 560 x 820 x 258 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 | 258 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 6750 kN |
| Basic static load rating C0 | 14100 kN |
| Fatigue load limit Pu | 750 kN |
| Limiting speed (mechanical) | 310 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 467000 g |
| Manufacturer designation | NTN 240/560B |
| 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 & 24000-series range
| Bore d | 22.047 in |
|---|---|
| Outer diameter D | 32.283 in |
| Width B | 10.157 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 130 mm |
| Smallest bore in 24000-series | 65 mm |
| Largest outer diameter in 24000-series | 1580 mm |
| Width range across 24000-series | 35–462 mm |
| Bore position in 24000-series (smallest first) | 30 of 42 |
| Bore above smallest 24000-series size | 495 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 240-560BK30 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 24000-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 240-560BK30 (K/K30 sleeve or tapered-seat mounting). 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 240-560B model number is decoded
NTN lists 240/560B with a cylindrical bore and plain outer ring (no D1/W33 groove): 560 mm bore, 820 mm OD, 258 mm width, rated 310 r/min on grease. The leading digits are the ISO 15 dimension series (24000 series); the bore code resolves to 560 mm (two-digit code ×5, with the 00–03 exception table), and 820 mm OD / 258 mm width follow the general plan. Two symmetric roller rows share the load: C 6750 kN, C0 14100 kN (C0/C ≈ 2.09), with useful axial capacity in either direction alongside the dominant radial load. 560 mm bore is 22.047 in and 820 mm OD is 32.283 in; the ISO 15 envelope swaps between brands, but the 6750/14100 kN ratings and cage design are NTN 2203E values. Fillet radii on shaft and housing must clear the ring chamfers of the 258 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
Typical equipment & failure modes
Common applications
- steel-mill and heavy crusher main shafts
- mining shovel and dragline swing shafts
- cement-rotary-kiln support and trunnion rolls
- large SAG/ball-mill trunnion and pinion shafts
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- 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
- fretting corrosion between adapter sleeve and tapered bore when the drive-up is insufficient
Selection pitfalls — read before you substitute
- At 560 mm bore 240/560B 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.
- Self-aligning does not mean unlimited misalignment: beyond the catalogue angle the outer ring's spherical travel is exhausted and the 6750 kN rating no longer applies.
- 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.
- Do not confuse EA and EM at the same number: 240/560B carries basic; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 560×820 mm envelope is identical.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 560 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- The 6750/14100 kN ratings, 750 kN Pu and 467000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 240/560B (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 240/560B?
240/560B is an NTN double-row spherical roller bearing to ISO 15: 560 mm bore, 820 mm OD and 258 mm width (22.047 × 32.283 × 10.157 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 6750 kN, C0 14100 kN, Pu 750 kN, grease limiting speed 310 r/min, oil 400 r/min, mass about 467000 g. It is open, with pressed-steel cage (standard execution).
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
240/560B has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 240/560BK30 (K = 1:12, or K30 = 1:30 on the wide series), intended for adapter/withdrawal-sleeve mounting.
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. 240/560B is the basic execution.
What do D1 and W33 mean on 240/560B?
240/560B 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 240/560B take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 24000 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 6750 kN C / 14100 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.