KR19-SK-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 KR19-SK-PP model number is decoded

envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.5 kN and C0 4.05 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.86 reflects a rolling-element pack sized for heavy static track loading, and the 5.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.55 kN at 8 mm stud, equivalent to 0.44 kN of dynamic rating per millimetre — the limiting speed is 11,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 29 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 8 mm stud shank this is one of the smallest HR1 executions — chosen where a 19 mm envelope must carry line-contact loads that no miniature ball bearing could take Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 32 mm overall stud length; the SK variant carries a hexagon socket in the stud for a key drive The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload Reading -PP: rubbing seals at each face of the 19 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. The SK socket prevents the stud from turning as the mounting nut is torqued, protecting the threaded 32 mm-long shank and the bracket faces. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 19 mm track diameter and 3.5 kN dynamic rating match the duty. In cam drives and indexing tables the threaded stud bolts directly to the frame, and in printing press sheet-transfer grippers the 29 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 32 mm stud length and the published 4.05 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. 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

• On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.
• The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.
• 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.