Abstract: A delimitation device delimits a penetration depth of a cutting head into a workpiece. The delimitation device has a detent sleeve, a sleeve holder and a cutting head. The detent sleeve has a detent side for landing on a workpiece surface. The sleeve holder in relation to a rotation axis is mounted so as to be rotatable relative to the detent sleeve, and in relation to the rotation axis is fixed in an axial position relative to the detent sleeve and supports the detent sleeve. The cutting head during a rotation of the cutting head conjointly rotates with the sleeve holder in relation to the rotation axis and has at least one cutting edge. The sleeve holder has a positioning face, wherein the positioning face is disposed proximal to the detent side, transversely to the rotation axis. The cutting head contacts the positioning face.

Abstract: A foil bearing for supporting a shaft includes a sleeve-type baring housing, at least one elastic corrugated foil arranged on the inner circumference of the bearing housing, and a respective top foil covering each corrugated foil and forming a bearing surface. The bearing housing includes insertion grooves defined therein that extend from the inner surface of the bearing housing and outwardly. The fop foil and the corrugated foil each have ends that are inserted into and received by the insertion grooves.

Abstract: A foil bearing for supporting a shaft includes a sleeve-type bearing housing with three foil arrangements distributed around the inner circumference of the baring housing. Each foil arrangement covers a circumferential segment of the bearing housing. Each foil arrangement has a corrugated foil lying against an inner wall of the housing, and a top foil covering the corrugated foil. Each of the corrugated foil and the top foil has respective end edges. Each of the end edges are supported within the inner wall of the housing in a sliding manner. In particular, insertion grooves are formed in the inner surface of the housing which extend obliquely into the housing wall outwardly. The insertion grooves receive the end edges of the corrugated foil and the top foil.

Abstract: A foil bearing for supporting a shaft includes a sleeve-type baring housing, at least one elastic corrugated foil arranged on the inner circumference of the bearing housing, and a respective top foil covering each corrugated foil and forming a bearing surface. The bearing housing includes insertion grooves defined therein that extend from the inner surface of the bearing housing and outwardly. The fop foil and the corrugated foil each have ends that are inserted into and received by the insertion grooves.