NA2208-2RSR 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 NA2208-2RSR model number is decoded

envelope 40×80×22.7 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 26 kN and C0 41.5 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.63 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 40 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 1.15 kN per millimetre of rolling-element complement mass is 628 g, or 0.35 g per mm² of the 80×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam at 40 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 22.7 mm width as a standard mounting space The inner ring means no hard journal is required — machine the pin to normal tolerance, fit the sealed roller, and forget relubrication for the design life The thick-walled 80 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals The 2RSR suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 80 mm outer ring. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 80 mm track diameter and 26 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 40 mm seat, and in packaging machine timing mechanisms the 628 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 22.7 mm width and the published 41.5 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 80 mm outer ring does. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 80 mm outer ring does.
• Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.
• 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.