232-600BK bearing: complete specifications & equivalents
The 232-600BK is a ISO 15 radial bearing sized 600 x 1090 x 388 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 | 1090 mm |
| Width B | 388 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 13600 kN |
| Basic static load rating C0 | 23700 kN |
| Fatigue load limit Pu | 930 kN |
| Limiting speed (mechanical) | 250 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1490000 g |
| Manufacturer designation | NTN 232/600BK |
| 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 & 23200-series range
| Bore d | 23.622 in |
|---|---|
| Outer diameter D | 42.913 in |
| Width B | 15.276 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 245 mm |
| Smallest bore in 23200-series | 90 mm |
| Largest outer diameter in 23200-series | 1360 mm |
| Width range across 23200-series | 52.4–475 mm |
| Bore position in 23200-series (smallest first) | 30 of 34 |
| Bore above smallest 23200-series size | 510 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 232-600B | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23200-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 232-600B — 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 232-600BK model number is decoded
232/600BK is an NTN double-row spherical roller bearing: two rows of symmetric rollers on a sphered outer raceway, 600×1090×388 mm to ISO 15, with pressed-steel cage (standard execution). Numbering ties 232/600BK 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. The 245.0 mm radial section over the 600 mm bore carries two roller rows; capacity per millimetre of bore is about 22.7 kN/mm, among the highest of rolling bearings for the ISO 15 envelope. Equivalent-load planning keeps a radial plus moderate axial combination on 232/600BK; if the axial component dominates, pair with a thrust bearing rather than running one roller row unloaded. 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
- 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
- cage damage when a mounting force is applied through the roller set instead of the ring face
- roller-end smearing during skidding starts under light load and high viscosity grease
- brinelling from static overload or a hammer blow during sleeve mounting
- water-induced pitting in washdown or outdoor duty without effective external seals
Selection pitfalls — read before you substitute
- At 600 mm bore 232/600BK 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.
- The two roller rows must share load equally — a tilted spacer or unequal abutment on the 388 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- Never substitute 232/600BK by envelope alone: the 23700 kN C0 and 930 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- Oil relubrication toward 320 r/min needs drain and level design; flooding the 388 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- The 1:12 tapered bore is the only difference from the cylindrical-bore 232/600B: envelopes and ratings match, but drive-up tooling, sleeve and seat do not — never mix the two mounting methods.
- The 13600/23700 kN ratings, 930 kN Pu and 1490000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 232/600BK (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 232/600BK?
232/600BK is an NTN double-row spherical roller bearing to ISO 15: 600 mm bore, 1090 mm OD and 388 mm width (23.622 × 42.913 × 15.276 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 13600 kN, C0 23700 kN, Pu 930 kN, grease limiting speed 250 r/min, oil 320 r/min, mass about 1490000 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. 232/600BK 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 232/600B.
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. 232/600BK is the basic execution.
What do D1 and W33 mean on 232/600BK?
232/600BK 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 232/600BK take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 23200 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 13600 kN C / 23700 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.