NATR20 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 NATR20 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 15.4 kN and C0 26 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.59 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 3.45 kN at 20 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 2,400 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 0.62 kN per millimetre of rolling-element complement mass is 246 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 at 20 mm pin bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The cage keeps the NATV at the higher limiting speed of 2,400 r/min for a track roller, with C 15.4 kN and C0 26 kN Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin 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 15.4 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 246 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 26 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. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.

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.
• Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.
• Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.