{
 "object": "free-piston-mover-2in",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "mover-core-2in-130",
   "step": "/files/hardware/free-piston-mover-2in/mover-core-2in-130.step",
   "stl": "/files/hardware/free-piston-mover-2in/mover-core-2in-130.stl",
   "note": "mover core, 130 long: 12-sided body (flats r 18.66) between Ø47 × 2 end flanges, Ø20 bore from the bottom to an 8 mm crown, M4 tap drill Ø3.3 × 6 in the crown"
  },
  {
   "name": "mover-sleeve-48x130",
   "step": "/files/hardware/free-piston-mover-2in/mover-sleeve-48x130.step",
   "stl": "/files/hardware/free-piston-mover-2in/mover-sleeve-48x130.stl",
   "note": "mover sleeve Ø48.00 / Ø47 × 130: the running surface"
  }
 ]
}