KRV-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 KRV-40-PPA model number is decoded

the 40 mm outside diameter runs on the track while the 18 mm stud shank takes the pin or shaft; the 58 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.2 kN and C0 26.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.54 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 3.1 kN at 18 mm stud gives a specific load of 0.79 kN per mm; the limiting speed is 2,200 r/min the 58 mm width carries the load at 0.24 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 250 g over a 40x58 mm envelope works out to 0.108 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 40 mm envelope, raising C0 to 26.5 kN at the cost of the 2200 r/min speed limit 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 glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 40 mm track diameter and 18 mm stud fit standard cam and rail geometries in robotic arm track guidance the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track
• the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life
• the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed