NCF2240-ECJB bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.2 high-capacity cylindrical roller bearings) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.2 high-capacity cylindrical roller bearings); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.

Cross references & equivalents

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 NCF2240-ECJB model number is decoded

In SKF catalogue PUB BU/P1 17000, SKF NCF 2240 ECJB denotes a high-capacity cylindrical roller bearing on the ISO 15 200×360×98 mm envelope, dimension series 22 (light-section, wide), with catalogue mass 43000 g. The NCF configuration means the high-capacity caged partner execution (ECJB pressed-steel cages with displaced cage bars for extra rollers), matching the NUH bearing in the same dimension envelope; functionally the bearing is the non-locating member of the paired high-capacity arrangement, absorbing axial displacement while carrying the full high radial rating. The ECJB suffix denotes the high-capacity execution with pressed-steel cages; /PEX marks the pinion-shaft special build with its own catalogue rating line. The pressed sheet-steel window-type cage is reflected in the published speeds and temperature limits. Selection arithmetic: C0/C ≈ 1.37 (2000 against 1460 kN), and the Pu figure 200 kN is the fatigue load-limit floor for the SKF life equation; the catalogue lists 1,900 r/min thermal reference speed and 2,400 r/min mechanical limiting speed. Fit practice for NCF2240-ECJB: used opposite the NUH locating bearing on wind-gearbox and heavy industrial pinion shafts; fit the inner ring with interference and let this bearing float axially. Single-row cylindrical rollers tolerate only about 3–4 minutes of arc misalignment, so verify shaft and housing alignment. This is the standard catalogue execution of the high-capacity design. Selected sizes in the range are also produced as /PEX pinion-shaft builds for wind-turbine gearboxes — separate order numbers with their own rating lines and internal profiling; the two must not be mixed using one another’s loads.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• High-capacity NUH and NCF bearings are designed as a locating/non-locating PAIR on the same shaft; fitting two locating NUH bearings can preload the arrangement thermally.
• The /PEX pinion execution carries its own rating line and internal geometry — never substitute a standard NCF 2240 using the /PEX loads.
• Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 360 mm raceway.
• Catalogue reference and limiting speeds are different criteria: observe the mechanical ceiling even when thermal calculations allow more.
• The 1460/2000 kN ratings are SKF catalogue 17000 (2018) values for the ECJB execution; re-verify against the current catalogue for critical drives and keep the catalogue version with the specification.