NUTR-25-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 NUTR-25-A model number is decoded

the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 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 double-row full-complement support roller, no integral flange executions fatigue load limit Pu 4.25 kN at 25 mm bore gives a specific load of 1.19 kN per mm; the limiting speed is 3,200 r/min the 25 mm width carries the load at 1.19 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 25 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NUTR is the heavy-duty support roller: two full rows of cylindrical rollers without a cage give the maximum dynamic capacity for the 52 mm envelope, but the outer ring relies entirely on the pressed-on flanges for axial location the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution 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 25 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling
• the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress
• relubrication is difficult because the roller rows are packed; follow the greasing interval strictly