Screw compressor element and machine

A screw compressor element comprising:

• a housing;
• a cylinder bearing including an inner ring, an outer ring, a raceway, and a cylindrical rolling element that contacts the inner ring and the outer ring at a location of the raceway thereof;
• a ball bearing including an inner ring, an outer ring, a raceway, and a ball shaped rolling element that contacts the inner ring and the outer ring at a location of the raceway thereof;
• and
• a nozzle arranged in a space, between the cylinder bearing and the ball bearing, and comprising a first outlet, positioned and configured to direct a first jet of lubrication fluid into the cylinder bearing, and a second outlet positioned and configured to direct a second jet of lubrication fluid into the ball bearing, wherein
• portions of each of the inner rings of the respective cylinder bearing and the ball bearing, at respective locations next to the respective raceways of the cylinder bearing and the ball bearing and facing away from the other of the respective cylinder bearing and the ball bearing, have greater outer diameters than diameters of the respective raceways,
• portions of each of the outer rings of the respective cylinder bearing and the ball bearing, at respective locations next to the respective raceways of the cylinder bearing and the ball bearing and both facing to and away from the other of the respective cylinder bearing and the ball bearing, have smaller inner diameters than the diameters of the respective raceways of the cylinder bearing and the ball bearing,
• wherein a rotor is rotatably arranged by way of the cylinder bearing and the ball bearing, and
• the smaller inner diameters of the portions of the outer ring of the ball bearing are at least one of:
• a. equal to each other, and
• b. at least one of the smaller inner diameters of the portions of the outer ring of the ball bearing is smaller than each of the smaller inner diameters of the portions of the outer ring of the cylindrical ball bearing.