RSTO8-TV 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 RSTO8-TV model number is decoded

envelope 12×24×9.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 4.2 kN and C0 5.6 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 6.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.8 kN at 12 mm bore, equivalent to 0.35 kN of dynamic rating per millimetre — the limiting speed is 8,000 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 9.8 mm contact width the dynamic rating works out to 0.43 kN per millimetre of rolling-element complement mass is 21 g, or 0.09 g per mm² of the 24×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm pin bore and only 21 g: the smallest sizes demand accurate shaft geometry, because the 6.0 mm section leaves no tolerance for a soft or tapered seat The pin surface at 12 mm must be hardened to 58–64 HRC like a shaft raceway; a soft pin flats quickly under the 5.6 kN static load RSTO rollers separate into their components, so the outer ring and needle-cage assembly can be placed in a yoke eye and retained by the pin during build -TV denotes the PA66 cage: light, quiet and self-lubricating in dry-running moments, but limited by the polymer's continuous-temperature ceiling well below the ring steel's. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 24 mm track diameter and 4.2 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 12 mm seat, and in woodworking machine feed tracks the 21 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 9.8 mm width and the published 5.6 kN static rating. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

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