Block and Tackle - Pulleys
by SteveWall, published
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This project began when my son chose to investigate block and tackle for his 1st grade science fair project. I was going to zip down to the local Home Depot and buy the supplies, but then thought, â€œI should just print em!â€. I iterated the design a couple of times before I printed the first full assembly. Then printed 3 more full assemblies. Works great! You will see that there are two types of sheaves, a single and double. The double actually should have been two separate thin sheaves next to each other within the pulley plates. The rope had very little friction, so I don't think much advantage was lost. Wooden dowels (1/4â€) were used to hold the hooks, eyes and sheaves between the side plates. You can decide whether to use a hook or eye on each end.
Print the parts and assemble according to the drawing. Light filing/sanding will be required to optimize the fit of the dowels. Initially, I didn't use the #2 wood screws, the assembly snapped together. Later, I added the wood screws. Pre-drill the ends of the wooden dowels and don't stab the sh*t out of your finger (like I did) when you screw in the fasteners. Refer to the pictures, route rope, lift something! I used 1/8â€ diameter nylon rope.
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Block and Tackle - Pulleys by SteveWall is licensed under the Creative Commons - Attribution - Share Alike license.
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