NA2207-2RSR 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 NA2207-2RSR model number is decoded

envelope 35×72×22.7 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 21.5 kN and C0 36.5 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 35 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 0.95 kN per millimetre of rolling-element complement mass is 505 g, or 0.31 g per mm² of the 72×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam the 35 mm pin bore places this bearing in the medium band, where the 72 mm envelope already carries ratings in the tens of kilonewtons Reading NA22..2RSR: sealed flangeless yoke roller with inner ring; the 22.7 mm-wide unit needs lateral location from the adjacent structure The thick-walled 72 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals The sealed 2RSR execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 72 mm track diameter and 21.5 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 35 mm seat, and in packaging machine timing mechanisms the 505 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 36.5 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. 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

• Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.
• Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.
• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does.