NUKR-47-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-47-A model number is decoded

the 47 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 28.6 kN and C0 33.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.85 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 3.9 kN at 20 mm stud gives a specific load of 1.43 kN per mm; the limiting speed is 3,800 r/min the 66 mm width carries the load at 0.43 kN per mm of roller complement; section height 13.5 mm between stud and track surface determines the outer-ring bending stiffness mass 380 g over a 47x66 mm envelope works out to 0.123 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 20 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages reading NUKR: double-row full-complement cylindrical roller cam follower; the 20 mm stud carries the two roller rows and the outer ring is guided axially by the flange ring typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 47 mm track diameter and 20 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 380 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

• the heavy section and full complement make this the stiffest cam follower — any stud bending 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 two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life