240-1060B bearing: complete specifications & equivalents
The 240-1060B 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 | 2450000 g |
| Manufacturer designation | NTN 240/1060B |
| 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 |
|---|---|---|---|
| 240-1060BK30 | 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 240-1060BK30 (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 240-1060B model number is decoded
240/1060B belongs to the 24000 series of NTN spherical rollers: self-aligning, high radial capacity, moderate axial load in either direction. Digit by digit the code reads as spherical-roller dimension series plus 1060 mm bore; the 438 mm width is the wide ISO 15 section, which is why spherical rollers interchange dimensionally but not in cage or rating detail. The bearing accepts predominantly radial load with a moderate axial share, but is not a pure thrust bearing: sustained axial-only load skids the unloaded row and damages the basic cage. Grease/oil ratio: the 140 r/min limiting value is .78 of the 180 r/min oil value; heavy 438 mm-wide cages run hot in churning grease, so quantity and groove supply both matter. After mounting on a tapered seat, lock the nut and re-check clearance after a short running-in period, because sleeve seating and ring lift-off can change the residual clearance of the 1060 mm set.
Typical equipment & failure modes
Common applications
- offshore and marine propulsion shaftlines
- large wind-turbine main-shaft arrangements
- steel-mill and heavy crusher main shafts
- mining shovel and dragline swing shafts
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- pressed EA cage fatigue under sustained vibration when minimum load is not maintained
- roller-end smearing during skidding starts under light load and high viscosity grease
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
Selection pitfalls — read before you substitute
- At 1060 mm bore 240/1060B 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 1060 mm bearing, and drive-up procedures differ.
- Do not confuse EA and EM at the same number: 240/1060B carries basic; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 1060×1500 mm envelope is identical.
- Open spherical rollers swallow dust in mining duty; specify labyrinth or taconite seals externally, or the 140 r/min grease rating is lost to abrasive wear long before fatigue.
- Never substitute 240/1060B by envelope alone: the 47000 kN C0 and 2060 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- The 19800/47000 kN ratings, 2060 kN Pu and 2450000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 240/1060B (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 240/1060B?
240/1060B 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 2450000 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?
240/1060B has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 240/1060BK30 (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. 240/1060B is the basic execution.
What do D1 and W33 mean on 240/1060B?
240/1060B 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 240/1060B 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.