{
 "object": "crank-discs-3mm-bore",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "crank-disc-b3-stroke10",
   "step": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke10.step",
   "stl": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke10.stl",
   "note": "crank disc Ø30 for a Ø3 crankshaft (the crank head's 623 towers), pin at 5.0 mm (10 mm stroke), M3 grub"
  },
  {
   "name": "crank-disc-b3-stroke15",
   "step": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke15.step",
   "stl": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke15.stl",
   "note": "crank disc Ø30 for a Ø3 crankshaft (the crank head's 623 towers), pin at 7.5 mm (15 mm stroke), M3 grub"
  },
  {
   "name": "crank-disc-b3-stroke20",
   "step": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke20.step",
   "stl": "/files/hardware/stirling-linkage-fittings/crank-disc-b3-stroke20.stl",
   "note": "crank disc Ø30 for a Ø3 crankshaft (the crank head's 623 towers), pin at 10.0 mm (20 mm stroke), M3 grub"
  }
 ]
}