240-1060BK30 bearing: complete specifications & equivalents
The 240-1060BK30 is a ISO 15 radial bearing sized 1060 x 1500 x 438 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 1060 mm |
| Outer diameter D | 1500 mm |
| Width B | 438 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 19800 kN |
| Basic static load rating C0 | 47000 kN |
| Fatigue load limit Pu | 2060 kN |
| Limiting speed (mechanical) | 140 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2140000 g |
| Manufacturer designation | NTN 240/1060BK30 |
| 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 | 41.732 in |
|---|---|
| Outer diameter D | 59.055 in |
| Width B | 17.244 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 220 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) | 41 of 42 |
| Bore above smallest 24000-series size | 995 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 240-1060B | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 24000-series envelope, cage and ratings; this is the tapered-bore execution (K30, 1:30) of the cylindrical-bore 240-1060B — 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 240-1060BK30 model number is decoded
240/1060BK30 is the basic execution of NTN's spherical roller range for a 1060 mm shaft — 19800 kN basic dynamic capacity in a 2140000 g, open ISO 15 envelope. The leading digits are the ISO 15 dimension series (24000 series); the bore code resolves to 1060 mm (two-digit code ×5, with the 00–03 exception table), and 1500 mm OD / 438 mm width follow the general plan. The sphered outer raceway lets the inner-ring assembly pivot, accommodating shaft deflection and housing misalignment (around 1–2° for this class; use the 2203E value for the exact series) without edge loading the rollers. The 220.0 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 438 mm-wide ring seats fully on both sides. Fillet radii on shaft and housing must clear the ring chamfers of the 438 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
Typical equipment & failure modes
Common applications
- heavy vibrating screens and grizzly feeders
- offshore and marine propulsion shaftlines
- large wind-turbine main-shaft arrangements
- steel-mill and heavy crusher main shafts
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- micro-pitting when the EHL film is thinner than the raceway composite roughness
- false brinelling on stopped machines exposed to screen or crusher vibration
- false brinelling on stopped machines exposed to screen or crusher vibration
Selection pitfalls — read before you substitute
- At 1060 mm bore 240/1060BK30 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.
- Oil relubrication toward 180 r/min needs drain and level design; flooding the 438 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- The D1/W33 groove only helps if the housing has a matching grease passage; mounting a grooved 240/1060BK30 in a solid block with no port wastes the feature and leaves the centre rows under-lubricated.
- Minimum load must be maintained even at rest under vibration: an unloaded 240/1060BK30 on a stopped screen false-brinells; parking brakes and shaker isolation both matter.
- Minimum load must be maintained even at rest under vibration: an unloaded 240/1060BK30 on a stopped screen false-brinells; parking brakes and shaker isolation both matter.
- The 19800/47000 kN ratings, 2060 kN Pu and 2140000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 240/1060BK30 (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 240/1060BK30?
240/1060BK30 is an NTN double-row spherical roller bearing to ISO 15: 1060 mm bore, 1500 mm OD and 438 mm width (41.732 × 59.055 × 17.244 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 19800 kN, C0 47000 kN, Pu 2060 kN, grease limiting speed 140 r/min, oil 180 r/min, mass about 2140000 g. It is open, with pressed-steel cage (standard execution) and a 1:30 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K30 denotes a 1:30 tapered bore (the wide 24000 series). 240/1060BK30 mounts on a matching adapter or withdrawal sleeve on a plain 1060 mm shaft and is driven up to a measured radial clearance; the cylindrical-bore counterpart is 240/1060B.
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. 240/1060BK30 is the basic execution.
What do D1 and W33 mean on 240/1060BK30?
240/1060BK30 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 240/1060BK30 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 — 19800 kN C / 47000 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.