NUTR-1747-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-1747-A model number is decoded

the 47 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22 kN and C0 27 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 3.05 kN at 17 mm bore gives a specific load of 1.29 kN per mm; the limiting speed is 4,500 r/min the 21 mm width carries the load at 1.05 kN per mm of roller complement; section height 15.0 mm between bore and track surface determines the outer-ring bending stiffness mass 220 g over a 47x21 mm envelope works out to 0.223 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers 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 21 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 woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 47 mm track diameter and 17 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 220 g mass is low enough for rapid indexing cycles 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 double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life
• 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 heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress