{
 "object": "tri-clamp-power-pistons",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "piston-1.5in-lap",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-lap.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-lap.stl",
   "note": "1.5 in full-bore piston \u00d834.90 \u00d7 42 (lapping stock, +0.10 over bore), two 8 mm lands, \u00d83 wrist pin at 17.6 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-1.5in-lap-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-lap-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-lap-rod.stl",
   "note": "1.5 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-1.5in-f010",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f010.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f010.stl",
   "note": "1.5 in full-bore piston \u00d834.70 \u00d7 42 (0.10 mm under bore), two 8 mm lands, \u00d83 wrist pin at 17.6 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-1.5in-f020",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f020.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f020.stl",
   "note": "1.5 in full-bore piston \u00d834.60 \u00d7 42 (0.20 mm under bore), two 8 mm lands, \u00d83 wrist pin at 17.6 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-1.5in-f020-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f020-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f020-rod.stl",
   "note": "1.5 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-1.5in-f030",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f030.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-f030.stl",
   "note": "1.5 in full-bore piston \u00d834.50 \u00d7 42 (0.30 mm under bore), two 8 mm lands, \u00d83 wrist pin at 17.6 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "lapping-handle-1.5in",
   "step": "/files/hardware/tri-clamp-power-pistons/lapping-handle-1.5in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/lapping-handle-1.5in.stl",
   "note": "1.5 in lapping handle: plug into the open skirt and a T-bar to turn the piston in the spool with lapping compound"
  },
  {
   "name": "crank-frame-1.5in",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-frame-1.5in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-frame-1.5in.stl",
   "note": "1.5 in crank frame: ISO 2852 cap face (clamps to the spool with a stock clamp), \u00d821 con-rod window, two towers with 608 pockets for a \u00d88 crankshaft 32 mm above the face, 21 mm between towers"
  },
  {
   "name": "crank-web-1.5in-s16",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-web-1.5in-s16.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-web-1.5in-s16.stl",
   "note": "1.5 in crank web: \u00d88 bore with M3 grub, \u00d83 pin at 8 mm (16 mm stroke); print two"
  },
  {
   "name": "conrod-1.5in-58",
   "step": "/files/hardware/tri-clamp-power-pistons/conrod-1.5in-58.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/conrod-1.5in-58.stl",
   "note": "1.5 in con-rod, 58 mm centres, 5 mm thick, 623 pockets both ends (wrist pin and crank pin \u00d83)"
  },
  {
   "name": "piston-2in-lap",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-lap.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-lap.stl",
   "note": "2 in full-bore piston \u00d847.60 \u00d7 56 (lapping stock, +0.10 over bore), two 8 mm lands, \u00d83 wrist pin at 23.5 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-2in-lap-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-lap-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-lap-rod.stl",
   "note": "2 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-2in-f010",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-f010.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-f010.stl",
   "note": "2 in full-bore piston \u00d847.40 \u00d7 56 (0.10 mm under bore), two 8 mm lands, \u00d83 wrist pin at 23.5 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-2in-f020",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-f020.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-f020.stl",
   "note": "2 in full-bore piston \u00d847.30 \u00d7 56 (0.20 mm under bore), two 8 mm lands, \u00d83 wrist pin at 23.5 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-2in-f020-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-f020-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-f020-rod.stl",
   "note": "2 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-2in-f030",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-f030.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-f030.stl",
   "note": "2 in full-bore piston \u00d847.20 \u00d7 56 (0.30 mm under bore), two 8 mm lands, \u00d83 wrist pin at 23.5 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "lapping-handle-2in",
   "step": "/files/hardware/tri-clamp-power-pistons/lapping-handle-2in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/lapping-handle-2in.stl",
   "note": "2 in lapping handle: plug into the open skirt and a T-bar to turn the piston in the spool with lapping compound"
  },
  {
   "name": "crank-frame-2in",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-frame-2in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-frame-2in.stl",
   "note": "2 in crank frame: ISO 2852 cap face (clamps to the spool with a stock clamp), \u00d828 con-rod window, two towers with 608 pockets for a \u00d88 crankshaft 34 mm above the face, 21 mm between towers"
  },
  {
   "name": "crank-web-2in-s24",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-web-2in-s24.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-web-2in-s24.stl",
   "note": "2 in crank web: \u00d88 bore with M3 grub, \u00d83 pin at 12 mm (24 mm stroke); print two"
  },
  {
   "name": "conrod-2in-70",
   "step": "/files/hardware/tri-clamp-power-pistons/conrod-2in-70.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/conrod-2in-70.stl",
   "note": "2 in con-rod, 70 mm centres, 5 mm thick, 623 pockets both ends (wrist pin and crank pin \u00d83)"
  },
  {
   "name": "piston-3in-lap",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-lap.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-lap.stl",
   "note": "3 in full-bore piston \u00d873.00 \u00d7 88 (lapping stock, +0.10 over bore), two 8 mm lands, \u00d83 wrist pin at 37.0 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-3in-lap-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-lap-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-lap-rod.stl",
   "note": "3 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-3in-f010",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-f010.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-f010.stl",
   "note": "3 in full-bore piston \u00d872.80 \u00d7 88 (0.10 mm under bore), two 8 mm lands, \u00d83 wrist pin at 37.0 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-3in-f020",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-f020.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-f020.stl",
   "note": "3 in full-bore piston \u00d872.70 \u00d7 88 (0.20 mm under bore), two 8 mm lands, \u00d83 wrist pin at 37.0 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "piston-3in-f020-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-f020-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-f020-rod.stl",
   "note": "3 in piston as above with a \u00d85.0 centre bore and boss in the crown for a dry 3 \u00d7 5 \u00d7 6 bushing (no oil): the displacer rod passes through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-3in-f030",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-f030.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-f030.stl",
   "note": "3 in full-bore piston \u00d872.60 \u00d7 88 (0.30 mm under bore), two 8 mm lands, \u00d83 wrist pin at 37.0 mm, open skirt; print crown up, 0.1 mm layers"
  },
  {
   "name": "lapping-handle-3in",
   "step": "/files/hardware/tri-clamp-power-pistons/lapping-handle-3in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/lapping-handle-3in.stl",
   "note": "3 in lapping handle: plug into the open skirt and a T-bar to turn the piston in the spool with lapping compound"
  },
  {
   "name": "crank-frame-3in",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-frame-3in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-frame-3in.stl",
   "note": "3 in crank frame: ISO 2852 cap face (clamps to the spool with a stock clamp), \u00d844 con-rod window, two towers with 608 pockets for a \u00d88 crankshaft 40 mm above the face, 21 mm between towers"
  },
  {
   "name": "crank-web-3in-s36",
   "step": "/files/hardware/tri-clamp-power-pistons/crank-web-3in-s36.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/crank-web-3in-s36.stl",
   "note": "3 in crank web: \u00d88 bore with M3 grub, \u00d83 pin at 18 mm (36 mm stroke); print two"
  },
  {
   "name": "conrod-3in-95",
   "step": "/files/hardware/tri-clamp-power-pistons/conrod-3in-95.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/conrod-3in-95.stl",
   "note": "3 in con-rod, 95 mm centres, 5 mm thick, 623 pockets both ends (wrist pin and crank pin \u00d83)"
  }
 ]
}