KRE52-PP 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 KRE52-PP 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 16.6 kN and C0 29.5 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.56 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 3.85 kN at 20 mm stud, equivalent to 0.83 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 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.25 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 473 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 the 20 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 66 mm overall stud length The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately -PP protection suits cams and rails that are washed down or run in dust; exceeding the 2,400 r/min speed ceiling overheats the lips rather than just accelerating wear. 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 16.6 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 473 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 29.5 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.
• The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.
• Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.