{
 "object": "counterweighted-crank-discs",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "cw-crank-disc-stroke10",
   "step": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke10.step",
   "stl": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke10.stl",
   "note": "counterweighted crank disc, 10 mm stroke (pin at 5.0), Ø5 bore, M3 grub, mass opposite the pin ≈ 50% of the con-rod+piston at the pin radius"
  },
  {
   "name": "cw-crank-disc-stroke15",
   "step": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke15.step",
   "stl": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke15.stl",
   "note": "counterweighted crank disc, 15 mm stroke (pin at 7.5), Ø5 bore, M3 grub, mass opposite the pin ≈ 50% of the con-rod+piston at the pin radius"
  },
  {
   "name": "cw-crank-disc-stroke20",
   "step": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke20.step",
   "stl": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke20.stl",
   "note": "counterweighted crank disc, 20 mm stroke (pin at 10.0), Ø5 bore, M3 grub, mass opposite the pin ≈ 50% of the con-rod+piston at the pin radius"
  },
  {
   "name": "cw-crank-disc-stroke25",
   "step": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke25.step",
   "stl": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke25.stl",
   "note": "counterweighted crank disc, 25 mm stroke (pin at 12.5), Ø5 bore, M3 grub, mass opposite the pin ≈ 50% of the con-rod+piston at the pin radius"
  },
  {
   "name": "cw-crank-disc-stroke30",
   "step": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke30.step",
   "stl": "/files/hardware/counterweighted-cranks/cw-crank-disc-stroke30.stl",
   "note": "counterweighted crank disc, 30 mm stroke (pin at 15.0), Ø5 bore, M3 grub, mass opposite the pin ≈ 50% of the con-rod+piston at the pin radius"
  }
 ]
}