Abstract: A method is provided for producing a ventilation bore in a thrust bearing of a crankcase of a reciprocating internal combustion engine by milling. The milling cutter is an angled-head milling cutter, which is introduced into the crankcase in the direction of a cylinder longitudinal axis and is moved in the direction of a crankcase longitudinal axis until the thrust bearing is perforated. Subsequently, the angled-head milling cutter is moved back in the direction of the crankcase longitudinal axis and removed from the crankcase by moving the angled-head milling cutter in the direction of the cylinder longitudinal axis. Internal stresses in the crankcase are avoided by the production of the ventilation bore, as a result of which the strength of the crankcase is increased.

Abstract: A crankcase is provided for an internal combustion engine with at least one coated cylinder bore, which has a chamfer on a separating surface facing a cylinder head. A countersink is arranged on the chamfer. The geometry allows an additional grinding process on a separating surface facing a cylinder head to be omitted.

Abstract: A rock bolt particularly for use in mining, comprising an anchor tube, an anchor nut, an anchor plate supported on the anchor nut. The rock bolt contacts the rock to show sufficient shearing resistance and may be easily cut. The rock bolt preferably includes an anchor tube that is surrounded by a jacket tube.

Abstract: A crankcase is provided for an internal combustion engine with at least one coated cylinder bore, which has a chamfer on a separating surface facing a cylinder head. A countersink is arranged on the chamfer. The geometry allows an additional grinding process on a separating surface facing a cylinder head to be omitted.