NUKRE-40-A bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers) · extracted 2026-09-30

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers); 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 NUKRE-40-A model number is decoded

the 40 mm outside diameter runs on the track while the 22 mm stud shank takes the pin or shaft; the 58 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19 kN and C0 22 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 2.5 kN at 22 mm stud gives a specific load of 0.86 kN per mm; the limiting speed is 4,500 r/min the 58 mm width carries the load at 0.33 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 260 g over a 40x58 mm envelope works out to 0.112 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 22 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 40 mm track diameter and 22 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 260 g mass is low enough for rapid indexing cycles the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring
• the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure
• the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting