KRV-52-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 KRV-52-PPA model number is decoded

the 52 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 66 mm overall width spreads the Hertzian contact over the outer ring published ratings C 20.9 kN and C0 46.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.45 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 5.6 kN at 20 mm stud gives a specific load of 1.04 kN per mm; the limiting speed is 1,900 r/min the 66 mm width carries the load at 0.32 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 460 g over a 52x66 mm envelope works out to 0.134 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm stud shank puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the KRV execution is the heavy-static counterpart of KR: full complement of needle rollers for maximum load capacity in slow or oscillating cam tracks the PPA variant has a crowned track surface: the 52 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 52 mm track diameter and 20 mm stud fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 460 g mass is low enough for rapid indexing cycles the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate
• the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track
• full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track