KR-80-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 KR-80-PPA model number is decoded

the 80 mm outside diameter runs on the track while the 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 36.9 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.51 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 9 kN at 30 mm stud gives a specific load of 1.23 kN per mm; the limiting speed is 1,800 r/min the 100 mm width carries the load at 0.37 kN per mm of roller complement; section height 25.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1600 g over a 80x100 mm envelope works out to 0.200 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the KR designation means the standard cam follower execution — cage-guided needle rollers for low friction, a threaded stud for direct bracket mounting, and a cylindrical outer ring for track contact the PPA variant has a crowned track surface: the 80 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 80 mm track diameter and 30 mm stud fit standard cam and rail geometries in cam mechanisms and indexing drives the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1600 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller
• the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating
• the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers