KRE30-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 KRE30-PP model number is decoded

envelope 12×30×40 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 6.8 kN and C0 8.7 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 9.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.24 kN at 12 mm stud, equivalent to 0.57 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 93 g, or 0.08 g per mm² of the 30×40 mm track envelope — inertia that the drive must accelerate on every index of the cam the 12 mm stud shank sits in the miniature band; at 40 mm wide the KRE30-PP is built into compact cam drives, indexing pawls and light linkages KR is the stud-type cam follower with a needle roller and cage assembly: the 12 mm threaded stud bolts into the bracket and the 30 mm crowned outer ring follows the cam The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 8.7 kN static rating and skews the outer ring -PP protection suits cams and rails that are washed down or run in dust; exceeding the 5,500 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 30 mm track diameter and 6.8 kN dynamic rating match the duty. In automotive welding jig rollers the threaded stud bolts directly to the frame, and in conveyor transfer and diverting stations the 93 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 40 mm stud length and the published 8.7 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. 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

• The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.
• 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.
• Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 40 mm stud unusable.