NATR50-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 NATR50-PP model number is decoded

envelope 50×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 31 kN and C0 60 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.52 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 8.5 kN at 50 mm bore, equivalent to 0.62 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 0.97 kN per millimetre of rolling-element complement mass is 867 g, or 0.30 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 50 mm pin bore places this bearing in the medium band, where the 90 mm envelope already carries ratings in the tens of kilonewtons The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 32 mm width covers most standard cam geometries Reading -PP: rubbing seals at each face of the 90 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 90 mm track diameter and 31 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 50 mm seat, and in woodworking machine feed tracks the 867 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 32 mm width and the published 60 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 90 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 90 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.