RSTO20 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 RSTO20 model number is decoded

envelope 25×47×15.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 16.1 kN and C0 22 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.1 kN at 25 mm bore, equivalent to 0.64 kN of dynamic rating per millimetre — the limiting speed is 2,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 1.02 kN per millimetre of rolling-element complement mass is 130 g, or 0.18 g per mm² of the 47×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 15.8 mm width and 16.1 kN C rating suit high-cycle industrial machinery rather than instrument duty At 130 g the roller adds little inertia to follower linkages, but the unflanged design walks off a skewed track — track parallelism substitutes for the missing guidance RSTO is the basic yoke-type track roller without inner ring and without axial guidance: the needle rollers run directly on a hardened, ground mounting pin Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 47 mm track diameter and 16.1 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 25 mm seat, and in automatic assembly machine carriages the 130 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 15.8 mm width and the published 22 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. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.

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.
• Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.
• 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.