RHP UK208 D1 Spannlager (40x80x31)

As an insert (Y) bearing, this bearing is located on the shaft and used in a housing. At 40x80x31 mm and a unit weight of 0.45 kg, the installation envelope is fixed; further technical details are held in the specification table. What is recorded for these items is the material — rings and balls in standard bearing steel — but not the sealing design or the clearance.

The insert bearing is built for the drawn, unstepped shaft with no machined bearing seat, and its two defining features follow from that. The inner ring is widened beyond the outer ring and carries the shaft locking — depending on the version, grub screws, an eccentric locking collar or an adapter sleeve — so that the bearing grips the shaft directly.

The outer surface is spherical and sits in the spherical seat of a plummer block, flanged or take-up housing, whereby the bearing position aligns itself to the shaft during mounting; this alignment movement is intended for setting up and not for continuous operation under changing misalignment. Because the locking works on a shaft with wider tolerances than a machined fit, running accuracy and permissible speed lie below those of a ball bearing fitted into a bearing seat, and load capacity is to be considered primarily in the radial direction.

Rings and balls are made of standard bearing steel. No separate catalogue attributes for the sealing design or the clearance of these items are available, and both belong in the selection: the sealing decides what ingress the bearing position withstands, whether relubrication can sensibly be provided for, and how tightly the permissible speed comes out; the clearance determines how much radial play the locking and the heating are allowed to consume.

Both figures are therefore to be taken from the type designation and the specification table of the individual item and reconciled with the conditions at the mounting location.