NATV-20-PPA 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-PPA 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 falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NATV drops the cage to pack the maximum number of needle rollers into the 47 mm envelope; the result is the highest static capacity of the flanged support rollers, at the cost of increased friction and heat PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include sheet-metal forming press feeds, textile machine cam drives and agricultural equipment cam followers this size is commonly specified for sheet-metal forming press feeds and textile machine cam drives, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in agricultural equipment cam followers 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 without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion
• without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting
• the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life