KR16-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 KR16-SK-PP model number is decoded

envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.15 kN and C0 3.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 6 mm stud, equivalent to 0.53 kN of dynamic rating per millimetre — the limiting speed is 14,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 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 28 mm overall stud length mass is 19 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm stud shank and only 19 g: the smallest sizes demand accurate shaft geometry, because the 5.0 mm section leaves no tolerance for a soft or tapered seat Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 28 mm overall stud length; the SK variant carries a hexagon socket in the stud for a key drive The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 3.4 kN static rating and skews the outer ring The PP seals make this a maintenance-free unit: the 3.15 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. -SK is a mounting-aid suffix only; the 3.15 kN rating and PP sealing are unchanged from the standard KR execution. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 16 mm track diameter and 3.15 kN dynamic rating match the duty. In conveyor transfer and diverting stations the threaded stud bolts directly to the frame, and in robotic arm linear axes the 19 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 28 mm stud length and the published 3.4 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. 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

• 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.
• The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.
• Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 28 mm stud unusable.