RSTO35 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 RSTO35 model number is decoded

envelope 42×72×19.8 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 42 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25 kN and C0 41 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.61 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.5 kN at 42 mm bore, equivalent to 0.60 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 42 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 375 g, or 0.26 g per mm² of the 72×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 42 mm pin bore marks the medium range: mounting forces and fits become critical, and the 375 g mass calls for proper induction or press tooling rather than hand fitting Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 19.8 mm-wide roller 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 Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 72 mm track diameter and 25 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 42 mm seat, and in automatic assembly machine carriages the 375 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 19.8 mm width and the published 41 kN static rating. 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. 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

• 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.
• Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.
• The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.