NA22-8-2RSR 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 NA22-8-2RSR model number is decoded

envelope 8×24×11.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 4.8 kN and C0 4.3 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 1.12 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.65 kN at 8 mm bore, equivalent to 0.60 kN of dynamic rating per millimetre — the limiting speed is 7,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement mass is 34 g, or 0.12 g per mm² of the 24×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 11.8 mm wide the NA22/8-2RSR is built into compact cam drives, indexing pawls and light linkages The thick-walled 24 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals With 2RSR seals the 34 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 24 mm track diameter and 4.8 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 8 mm seat, and in automatic assembly machine carriages the 34 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 11.8 mm width and the published 4.3 kN static rating. 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. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does.
• 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.