KR-19-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-19-PPA model number is decoded

the 19 mm outside diameter runs on the track while the 8 mm stud shank takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.47 kN and C0 3.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.91 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.415 kN at 8 mm stud gives a specific load of 0.43 kN per mm; the limiting speed is 5,600 r/min the 32 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.5 mm between stud and track surface determines the outer-ring bending stiffness mass 29 g over a 19x32 mm envelope works out to 0.048 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 8 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms KR names the basic cam follower: a stud-type track roller with a needle roller and cage assembly; the 8 mm stud shank mounts through a machine bracket and the 19 mm outer ring runs on the cam the PPA suffix specifies a crowned (radius) outer-ring running surface instead of the standard cylindrical profile — the crown distributes edge stress when the track is not perfectly aligned typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 19 mm track diameter and 8 mm stud fit standard cam and rail geometries in sheet-metal forming press feeds the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 29 g mass is low enough for rapid indexing cycles the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller

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 open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway
• the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers