PWKRE52-2RS-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 PWKRE52-2RS-XL model number is decoded

envelope 20×52×66 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 25.5 kN and C0 33.5 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.2 kN at 20 mm stud, equivalent to 1.27 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.39 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 470 g, or 0.14 g per mm² of the 52×66 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm stud shank this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 20 mm stud clamps into the machine frame with its nut and washer while the 52 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 66 mm The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,800 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 52 mm track diameter and 25.5 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 470 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 66 mm stud length and the published 33.5 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.
• 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.
• 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.