239-1060K bearing: complete specifications & equivalents
The 239-1060K is a ISO 15 radial bearing sized 1060 x 1400 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 | 1060 mm |
| Outer diameter D | 1400 mm |
| Width B | 250 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 10400 kN |
| Basic static load rating C0 | 24700 kN |
| Fatigue load limit Pu | 1670 kN |
| Limiting speed (mechanical) | 160 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1060000 g |
| Manufacturer designation | NTN 239/1060K |
| 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 | 41.732 in |
|---|---|
| Outer diameter D | 55.118 in |
| Width B | 9.843 in |
| ISO bore code | 39 |
| 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) | 33 of 38 |
| Bore above smallest 23900-series size | 900 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 239-1060 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23900-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 239-1060 — 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 239-1060K model number is decoded
NTN lists 239/1060K with a 1:12 tapered bore (K) and plain outer ring (no D1/W33 groove): 1060 mm bore, 1400 mm OD, 250 mm width, rated 160 r/min on grease. The leading digits are the ISO 15 dimension series (23900 series); the bore code resolves to 1060 mm (two-digit code ×5, with the 00–03 exception table), and 1400 mm OD / 250 mm width follow the general plan. Suffix reading on 239/1060K: the bare number is the standard open execution; K marks the 1:12 tapered bore; quote the full code because each suffix is a distinct article. Grease/oil ratio: the 160 r/min limiting value is .76 of the 210 r/min oil value; heavy 250 mm-wide cages run hot in churning grease, so quantity and groove supply both matter. 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
- steel-mill and heavy crusher main shafts
- mining shovel and dragline swing shafts
- cement-rotary-kiln support and trunnion rolls
- large SAG/ball-mill trunnion and pinion shafts
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- cage damage when a mounting force is applied through the roller set instead of the ring face
- 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
- fretting corrosion between adapter sleeve and tapered bore when the drive-up is insufficient
Selection pitfalls — read before you substitute
- At 1060 mm bore 239/1060K 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.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 1060 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- Never substitute 239/1060K by envelope alone: the 24700 kN C0 and 1670 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- 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 10400/24700 kN ratings, 1670 kN Pu and 1060000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 239/1060K (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 239/1060K?
239/1060K is an NTN double-row spherical roller bearing to ISO 15: 1060 mm bore, 1400 mm OD and 250 mm width (41.732 × 55.118 × 9.843 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 10400 kN, C0 24700 kN, Pu 1670 kN, grease limiting speed 160 r/min, oil 210 r/min, mass about 1060000 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. 239/1060K 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 239/1060.
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. 239/1060K is the basic execution.
What do D1 and W33 mean on 239/1060K?
239/1060K 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 239/1060K 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 — 10400 kN C / 24700 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.