240-600B bearing: complete specifications & equivalents
The 240-600B is a ISO 15 radial bearing sized 600 x 870 x 272 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 600 mm |
| Outer diameter D | 870 mm |
| Width B | 272 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 7150 kN |
| Basic static load rating C0 | 15600 kN |
| Fatigue load limit Pu | 750 kN |
| Limiting speed (mechanical) | 280 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 544000 g |
| Manufacturer designation | NTN 240/600B |
| 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 | 23.622 in |
|---|---|
| Outer diameter D | 34.252 in |
| Width B | 10.709 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 135 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) | 31 of 42 |
| Bore above smallest 24000-series size | 535 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 240-600BK30 | 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 240-600BK30 (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 240-600B model number is decoded
240/600B is an NTN double-row spherical roller bearing: two rows of symmetric rollers on a sphered outer raceway, 600×870×272 mm to ISO 15, with pressed-steel cage (standard execution). Numbering ties 240/600B to its envelope and execution: same-number EA versus EM or plain variants share the 600 mm bore but differ in cage and sometimes mass, so they are quoted as separate articles. Suffix reading on 240/600B: the bare number is the standard open execution; B marks the standard large-bore internal design on slash-size 230–232 series; quote the full code because each suffix is a distinct article. The 135.0 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 272 mm-wide ring seats fully on both sides. Check the self-aligning movement after fitting: the housing should pivot freely around the sphered outer raceway; a pinched outer ring removes the alignment capacity the bearing was selected for.
Typical equipment & failure modes
Common applications
- large SAG/ball-mill trunnion and pinion shafts
- heavy vibrating screens and grizzly feeders
- offshore and marine propulsion shaftlines
- large wind-turbine main-shaft arrangements
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- sliding wear and heat when relubrication intervals ignore the groove (D1/W33) supply path
- 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 600 mm bore 240/600B 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 370 r/min needs drain and level design; flooding the 272 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- The cylindrical-bore 240/600B and its tapered-bore counterpart 240/600BK30 share envelope and ratings but not mounting: do not order the K variant unless the drawing specifies a sleeve or tapered seat.
- Do not confuse EA and EM at the same number: 240/600B carries basic; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 600×870 mm envelope is identical.
- The two roller rows must share load equally — a tilted spacer or unequal abutment on the 272 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- The 7150/15600 kN ratings, 750 kN Pu and 544000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 240/600B (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 240/600B?
240/600B is an NTN double-row spherical roller bearing to ISO 15: 600 mm bore, 870 mm OD and 272 mm width (23.622 × 34.252 × 10.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 7150 kN, C0 15600 kN, Pu 750 kN, grease limiting speed 280 r/min, oil 370 r/min, mass about 544000 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?
240/600B has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 240/600BK30 (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. 240/600B is the basic execution.
What do D1 and W33 mean on 240/600B?
240/600B 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 240/600B 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 — 7150 kN C / 15600 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.