KR47-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 KR47-PP model number is decoded

envelope 20×47×66 mm: the 47 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 15.4 kN and C0 26 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.59 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 3.45 kN at 20 mm stud, equivalent to 0.77 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 0.23 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 381 g, or 0.12 g per mm² of the 47×66 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm stud shank the 66 mm width and 15.4 kN C rating suit high-cycle industrial machinery rather than instrument duty KR is the stud-type cam follower with a needle roller and cage assembly: the 20 mm threaded stud bolts into the bracket and the 47 mm crowned outer ring follows the cam The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The PP seals make this a maintenance-free unit: the 15.4 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 47 mm track diameter and 15.4 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 381 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 66 mm stud length and the published 26 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. 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.

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 stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.
• 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.