NUTR-45100-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-45100-A model number is decoded

the 100 mm outside diameter runs on the track while the 45 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 73.7 kN and C0 104 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.71 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 12.7 kN at 45 mm bore gives a specific load of 1.64 kN per mm; the limiting speed is 1,700 r/min the 32 mm width carries the load at 2.30 kN per mm of roller complement; section height 27.5 mm between bore and track surface determines the outer-ring bending stiffness mass 1400 g over a 100x32 mm envelope works out to 0.438 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 45 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads 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 conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 100 mm track diameter and 45 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 100 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1400 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 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
• 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 full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling