NUKR-52-A 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 NUKR-52-A 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 29.7 kN and C0 36 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.82 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 4.25 kN at 20 mm stud gives a specific load of 1.48 kN per mm; the limiting speed is 3,200 r/min the 66 mm width carries the load at 0.45 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 450 g over a 52x66 mm envelope works out to 0.131 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-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 NUKR identifies the full-complement cylindrical roller cam follower: two rows of cylindrical rollers give the highest radial ratings in the 52 mm size, with the outer ring axially guided by the stud head and a pressed-on flange ring 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 52 mm track diameter and 20 mm stud fit standard cam and rail geometries in robotic arm track guidance the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 450 g mass is low enough for rapid indexing cycles the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress
• the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile
• the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension