NUTR-50-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-50-A model number is decoded

the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 58.3 kN and C0 78 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.75 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 9.65 kN at 50 mm bore gives a specific load of 1.17 kN per mm; the limiting speed is 1,600 r/min the 32 mm width carries the load at 1.82 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 950 g over a 90x32 mm envelope works out to 0.330 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 50 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 32 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life 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 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 950 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 construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension
• the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress
• the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load