239-1120 bearing: complete specifications & equivalents
The 239-1120 is a ISO 15 radial bearing sized 1120 x 1460 x 250 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 1120 mm |
| Outer diameter D | 1460 mm |
| Width B | 250 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 10900 kN |
| Basic static load rating C0 | 26700 kN |
| Fatigue load limit Pu | 1470 kN |
| Limiting speed (mechanical) | 150 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1140000 g |
| Manufacturer designation | NTN 239/1120 |
| 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 & 23900-series range
| Bore d | 44.094 in |
|---|---|
| Outer diameter D | 57.48 in |
| Width B | 9.843 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 170 mm |
| Smallest bore in 23900-series | 160 mm |
| Largest outer diameter in 23900-series | 1820 mm |
| Width range across 23900-series | 45–315 mm |
| Bore position in 23900-series (smallest first) | 34 of 38 |
| Bore above smallest 23900-series size | 960 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 239-1120K | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23900-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 239-1120K (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 239-1120 model number is decoded
NTN lists 239/1120 with a cylindrical bore and plain outer ring (no D1/W33 groove): 1120 mm bore, 1460 mm OD, 250 mm width, rated 150 r/min on grease. Numbering ties 239/1120 to its envelope and execution: same-number EA versus EM or plain variants share the 1120 mm bore but differ in cage and sometimes mass, so they are quoted as separate articles. Suffix reading on 239/1120: the bare number is the standard open execution; quote the full code because each suffix is a distinct article. Pu 1470 kN against C0 26700 kN anchors the contamination derating; for dirty mining duty the adjusted life of 239/1120 moves with cleanliness far more than with small C variations. Fillet radii on shaft and housing must clear the ring chamfers of the 250 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
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
- 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
- rolling-contact fatigue after the catalogue L10 life at the actual load
Selection pitfalls — read before you substitute
- At 1120 mm bore 239/1120 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 250 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- Never substitute 239/1120 by envelope alone: the 26700 kN C0 and 1470 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- 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 1120 mm bearing, and drive-up procedures differ.
- The two roller rows must share load equally — a tilted spacer or unequal abutment on the 250 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- The 10900/26700 kN ratings, 1470 kN Pu and 1140000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 239/1120 (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 239/1120?
239/1120 is an NTN double-row spherical roller bearing to ISO 15: 1120 mm bore, 1460 mm OD and 250 mm width (44.094 × 57.48 × 9.843 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 10900 kN, C0 26700 kN, Pu 1470 kN, grease limiting speed 150 r/min, oil 200 r/min, mass about 1140000 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?
239/1120 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 239/1120K (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. 239/1120 is the basic execution.
What do D1 and W33 mean on 239/1120?
239/1120 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 239/1120 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 23900 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 10900 kN C / 26700 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.