PWKR90-2RS-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 PWKR90-2RS-XL model number is decoded

envelope 30×90×100 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 62 kN and C0 92 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 12.5 kN at 30 mm stud, equivalent to 2.07 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.62 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.96 kg (1960 g), or 0.22 g per mm² of the 90×100 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm stud shank this size balances the 90 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 1960 g roller runs without cantilever bending The 30 mm stud clamps into the machine frame with its nut and washer while the 90 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 100 mm X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 92 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 30 mm-bore unit greased for life. Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 90 mm track diameter and 62 kN dynamic rating match the duty. In glass and ceramic line conveyors the threaded stud bolts directly to the frame, and in linear rail and profile track guidance the 1.96 kg mass is part of the rotor inertia calculation. Designers also specify it for printing press sheet-transfer grippers, relying on the 100 mm stud length and the published 92 kN static rating. 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. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.
• 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.