NATV-35-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-35-PPA model number is decoded

the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.9 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.44 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 8.8 kN at 35 mm bore gives a specific load of 0.91 kN per mm; the limiting speed is 1,100 r/min the 29 mm width carries the load at 1.10 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 630 g over a 72x29 mm envelope works out to 0.302 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 35 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 72 mm envelope, traded against the reduced 1100 r/min speed limit PPA denotes the crowned running surface: the 72 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks 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 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 630 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

• the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life
• without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting
• full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track