NUKR-40-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-40-A 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 19 kN and C0 22 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 2.5 kN at 18 mm stud gives a specific load of 1.06 kN per mm; the limiting speed is 4,500 r/min the 58 mm width carries the load at 0.33 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 240 g over a 40x58 mm envelope works out to 0.103 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 NUKR identifies the full-complement cylindrical roller cam follower: two rows of cylindrical rollers give the highest radial ratings in the 40 mm size, with the outer ring axially guided by the stud head and a pressed-on flange ring typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 40 mm track diameter and 18 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 240 g mass is low enough for rapid indexing cycles 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

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension
• 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