{
 "object": "rhombic-crank-gear",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "crank-gear-m1.5-44t-e7",
   "step": "/files/hardware/rhombic-drive-kit/crank-gear-m1.5-44t-e7.step",
   "stl": "/files/hardware/rhombic-drive-kit/crank-gear-m1.5-44t-e7.stl",
   "note": "crank gear module 1.5, 44 teeth (Ø66 pitch, Ø69 tip), 6 face, Ø12 × 5 hub with an M3 grub (Ø2.5 tapped), Ø5 bore, Ø3 crank-pin hole at 7 mm, 2.045° (a quarter tooth pitch) off a tooth centre; two per drive, meshed on 66 mm centres"
  }
 ]
}