NATV-20 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 NATV-20 model number is decoded

the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.4 kN and C0 41.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.47 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5 kN at 20 mm bore gives a specific load of 0.97 kN per mm; the limiting speed is 1,900 r/min the 25 mm width carries the load at 0.78 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 47 mm envelope, traded against the reduced 1900 r/min speed limit typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in glass processing line conveyors the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life
• full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track
• the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed