PWKR72-2RS-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 PWKR72-2RS-XL model number is decoded

envelope 24×72×80 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 39 kN and C0 55 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 24.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.1 kN at 24 mm stud, equivalent to 1.63 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.49 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.02 kg (1020 g), or 0.18 g per mm² of the 72×80 mm track envelope — inertia that the drive must accelerate on every index of the cam the 24 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 2,200 r/min and no thermal reference speed is given for track rollers The 24 mm stud clamps into the machine frame with its nut and washer while the 72 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 80 mm -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 39 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 72 mm outer ring. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 72 mm track diameter and 39 kN dynamic rating match the duty. In woodworking machine feed tracks the threaded stud bolts directly to the frame, and in cam drives and indexing tables the 1.02 kg mass is part of the rotor inertia calculation. Designers also specify it for packaging machine timing mechanisms, relying on the 80 mm stud length and the published 55 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.
• Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.
• The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.