NATV-25-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-25-PPA model number is decoded

the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.8 kN and C0 44 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.45 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5.3 kN at 25 mm bore gives a specific load of 0.79 kN per mm; the limiting speed is 1,600 r/min the 25 mm width carries the load at 0.79 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 25 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NATV drops the cage to pack the maximum number of needle rollers into the 52 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 linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles 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

Typical equipment & failure modes

Selection pitfalls — read before you substitute

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