NA2204-2RSR 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 NA2204-2RSR model number is decoded

envelope 20×47×17.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 17.8 mm width sets the contact width on the mating track the catalogue lists C 14 kN and C0 19.3 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.73 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 2.7 kN at 20 mm bore, equivalent to 0.70 kN of dynamic rating per millimetre — the limiting speed is 2,300 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 17.8 mm contact width the dynamic rating works out to 0.79 kN per millimetre of rolling-element complement mass is 177 g, or 0.21 g per mm² of the 47×17.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty C 14 kN and C0 19.3 kN cover the supported-track bending case; the contact seals set the limiting speed at 2,300 r/min The thick-walled 47 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals Reading the suffix: 2RSR is the FAG/INA code for rubbing lip seals at both faces, making the 20 mm-bore unit greased for life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 47 mm track diameter and 14 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 20 mm seat, and in packaging machine timing mechanisms the 177 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 17.8 mm width and the published 19.3 kN static rating. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does.