RSTO17 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 RSTO17 model number is decoded

envelope 22×40×15.8 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 22 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 14.2 kN and C0 18.2 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 9.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.55 kN at 22 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 2,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 22 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 0.90 kN per millimetre of rolling-element complement mass is 88 g, or 0.14 g per mm² of the 40×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 22 mm pin bore the 15.8 mm width and 14.2 kN C rating suit high-cycle industrial machinery rather than instrument duty The pin surface at 22 mm must be hardened to 58–64 HRC like a shaft raceway; a soft pin flats quickly under the 18.2 kN static load Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 14.2 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 22 mm seat, and in automotive welding jig rollers the 88 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 15.8 mm width and the published 18.2 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. 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.

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.
• 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.
• Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.