NATR12 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 NATR12 model number is decoded

envelope 12×32×15 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 7 kN and C0 9.2 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.32 kN at 12 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 4,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.47 kN per millimetre of rolling-element complement mass is 71 g, or 0.15 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm pin bore and only 71 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat The cage keeps the NATV at the higher limiting speed of 4,500 r/min for a track roller, with C 7 kN and C0 9.2 kN The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 15 mm width covers most standard cam geometries Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 32 mm track diameter and 7 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 12 mm seat, and in cam drives and indexing tables the 71 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 15 mm width and the published 9.2 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 32 mm outer ring does.