NATV-40-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-40-PPA model number is decoded

the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 39.1 kN and C0 88 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 11 kN at 40 mm bore gives a specific load of 0.98 kN per mm; the limiting speed is 950 r/min the 32 mm width carries the load at 1.22 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 830 g over a 80x32 mm envelope works out to 0.324 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 40 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 80 mm envelope, traded against the reduced 950 r/min speed limit PPA denotes the crowned running surface: the 80 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 830 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 absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed
• without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting
• in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution