The axial piston design has no bearings in the power train and friction on all other moveable parts is drastically minimized. There are rotating parts only, a cylinder rotor in ceramic and a piston rotor in stainless steel 316. Both rotate intertwined with an inclination angle of 5°.
 
Wolfhart's first model has 6cc and delivers 4 Hp at 4000 rpm at 1000 PSI water pressure or delivers as pump 6 GPM water at 1000 PSI and 3600 rpm. This pump is suitable for drinking water.