NATR-5-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 NATR-5-PPA model number is decoded

the 16 mm outside diameter runs on the track while the 5 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.14 kN and C0 3.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.98 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.345 kN at 5 mm bore gives a specific load of 0.63 kN per mm; the limiting speed is 6,000 r/min the 12 mm width carries the load at 0.26 kN per mm of roller complement; section height 5.5 mm between bore and track surface determines the outer-ring bending stiffness mass 14 g over a 16x12 mm envelope works out to 0.073 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 5 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces the PPA variant has a crowned track surface: the 16 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 16 mm track diameter and 5 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 16 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 14 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width
• the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them
• cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism