NUTR20 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (HR1 2026-09-25) · extracted 2026-09-30

Parameters extracted from the official FAG Rolling Bearings catalogue (HR1 2026-09-25); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.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 NUTR20 model number is decoded

envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 28.5 kN and C0 38 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.95 kN at 20 mm bore, equivalent to 1.43 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.14 kN per millimetre of rolling-element complement mass is 245 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm pin bore the 25 mm width and 28.5 kN C rating suit high-cycle industrial machinery rather than instrument duty NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 47 mm track-roller envelope, open and relubricatable Two roller rows across the 25 mm width provide C 28.5 kN and C0 38 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 47 mm track diameter and 28.5 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 20 mm seat, and in automatic assembly machine carriages the 245 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 25 mm width and the published 38 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.
• The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.
• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does.