Spin pump with spun-epicyclic geometry

A pump system with a compressor pump and a vacuum pump on a common shaft, comprising:

• a rotor that rotates about a first axis, the rotor having a first and a second radial piston bore each sized to contain at least one piston, wherein the first radial piston bore can serve as a vacuum pump and the second radial piston bore can serve as a compressor pump;
• a crankshaft defining a second axis parallel to and offset from the first axis, wherein the crankshaft rotates about the second axis and drives rotation of the rotor;
• wherein a first piece and a second piece mate to collectively form the rotor, wherein the first piece includes a first tongue and a second tongue that define a first space and a second space between the first tongue and the second tongue, and wherein the second piece includes a third tongue and a fourth tongue, and wherein the third tongue and the fourth tongue are positioned within the first space and the second space when the first piece and second piece are mated together;
• wherein the first radial piston bore extends at least partially through the first tongue and the second tongue, and the second radial piston bore extends at least partially through the third tongue and the fourth tongue.