NUTR-3580-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-3580-A model number is decoded

the 80 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 51.2 kN and C0 68 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 8.3 kN at 35 mm bore gives a specific load of 1.46 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.77 kN per mm of roller complement; section height 22.5 mm between bore and track surface determines the outer-ring bending stiffness mass 840 g over a 80x29 mm envelope works out to 0.362 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs NUTR names a double-row full-complement cylindrical roller support roller: two roller sets carry the radial load, giving the highest C 51.2 kN of the 80 mm sizes, but there is no integral flange between the rows 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 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 80 mm track diameter and 35 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 840 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress
• the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life
• the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension