Piston machine and distributor element

The lubrication system for the crankshaft, in a piston motor, has a lubricant distributor (42) at the bearing bush (29), positioned by it. The bearing bush (29) has an opening (54), which works with the lubricant distributor (42), and a lubricant groove (56), linked to the distributor (42) through the opening (54), with a multi-part bush structure of bearing shells (30). The lubricant distributor (42) has at least one spray unit (44), pref. as a spray jet, opening into a cylinder of the motor. The distributor (42) is of a plastics material, or it is a turned metal component.