NATR12-PP 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-PP 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 66 g, or 0.14 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm pin bore this is one of the smallest HR1 executions — chosen where a 32 mm envelope must carry line-contact loads that no miniature ball bearing could take At 12 mm bore and 66 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The crowned outside surface of the 32 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Reading -PP: rubbing seals at each face of the 32 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 32 mm track diameter and 7 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 12 mm seat, and in automotive welding jig rollers the 66 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, 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. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.

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.
• The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.
• 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.