PWTR20-2RS-XL 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 PWTR20-2RS-XL model number is decoded

envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 24.6 kN and C0 31 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.8 kN at 20 mm bore, equivalent to 1.23 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.98 kN per millimetre of rolling-element complement mass is 245 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm pin bore the 25 mm width and 24.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The 20 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 31 kN static rating As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 3.8 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 3,800 r/min. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 47 mm track diameter and 24.6 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 20 mm seat, and in robotic arm linear axes the 245 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 25 mm width and the published 31 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. 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

• 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.
• 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.