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CNC template · Technology and experiments

Winch with ratchet and pawl

Preview of the CNC template “Winch with ratchet and pawl”

Windlass with crank, rope drum and a ratchet wheel into which a pawl drops: the load can be cranked up and stays at any height. To lower it, lift the pawl. All tenoned.

Size
332 × 258 mm, 6 mm thick
Material
Plywood
Difficulty
Intermediate
Milling time
approx. 19 min
Bits
End mill Ø 3.175 mm
Customise
Size, text and details adjustable with sliders

Free with an account · carve with Chrome or Edge · no installation

Build instructions

Materials and accessories

QtyPart
1Beech dowel rod 8 mm
1Wood glue (water-resistant D3)
1Nylon thread or yarn

Also: sandpaper (grit 120 and 240), a utility knife or fine saw and, for joints, a rubber mallet.

Carving and finishing

  1. Clamp the workpiece flat on the spoilboard or secure it with double-sided tape, and set the origin as shown in the carving assistant.
  2. Mill mortises and axle holes, then cut out base, cheeks, drum discs, ratchet wheel, pawl and crank.
  3. Free the parts at the holding tabs with a utility knife or fine saw and sand the tab remains flush.
  4. Before gluing, dry-fit everything. If a joint is too tight, increase the clearance by 0.05 mm and carve the part again; if it wobbles, reduce it.

Assembly and final touches

  1. Glue the cheeks into the base. Push a dowel loosely through both cheeks while fitting the drum: flange, two core discs, flange, all glued tightly.
  2. Fit the ratchet wheel on the outside and the crank behind it tightly onto the shaft. Put the pawl loosely on a short dowel in the cheek so its tip drops into the teeth from above.
  3. Knot a rope through the hole in the core and wind it up. Cranking lifts the load; let go and the pawl holds. To lower, lift the pawl and hold the crank.

How to carve this template

  1. OpenOpen the template in the app and adjust size and text if you like.
  2. CheckLook at it in 3D, check run time and warnings.
  3. Set upThe carve wizard guides you through material, clamping, bit and zero point.
  4. CarvePress start; the app drives your Grbl router directly over USB.