KRE40-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 KRE40-PP model number is decoded

envelope 18×40×58 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 18 mm stud — and the 58 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 10.9 kN and C0 16 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.13 kN at 18 mm stud, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 2,900 r/min and, as for HR1 track rollers, no thermal reference speed is published the 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 255 g, or 0.11 g per mm² of the 40×58 mm track envelope — inertia that the drive must accelerate on every index of the cam at 18 mm stud shank this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range C 10.9 kN, C0 16 kN and Cur 2.13 kN are the cam-contact ratings; the limiting speed is 2,900 r/min with no reference speed published KR is the stud-type cam follower with a needle roller and cage assembly: the 18 mm threaded stud bolts into the bracket and the 40 mm crowned outer ring follows the cam -PP protection suits cams and rails that are washed down or run in dust; exceeding the 2,900 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 40 mm track diameter and 10.9 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 255 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 58 mm stud length and the published 16 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. 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

• On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.
• 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.