Double pulley, how to make it.

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Some steps showing how you can make a double pulley almost half ING the weight you need to pull.

Felix Brunner

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Thank you! This is the best video yet on rigging twin wheel pulleys. Every other one wants to show me theory and use drawings or separate pulleys in tandem. Bravo! Ten thumbs up!

DanielinLaTuna

thank you ! if i had any hair left i would have pulled it all out by now. video is easy to understand and works :) !

secondaccount

Thanks for the video pretty helpful. I'm going to be building a bicycle storage system using pulleys has helped as a demonstration.

lucasdoody

Thank you, just the rig I need for light to moderate duty in the garage!

qball

After the last passthrough, you need to attach the rope to the knot (or to a hook/loop you fashion) at the top of the first pulley instead. The way you did it, you are only using three pulley wheels instead of four.

MinnesotaFarmboy

Thanks for the video! However, if I'm not mistaken, the setup that you demonstrate would decrease your load by 66%, not 50%, since you're distributing the weight among 3 cords. So your 60 kg stone effectively becomes 20 kg. Furthermore, if, instead of tying off the knot on the bottom pulley (which is effectively utilizing only half of that pulley), you brought it back up and secured it to the support rod to which your upper pulley is attached, you'd be using FOUR cords to support the load, and your 60 kg stone would now be 15 kg!

ptortland

You sound so much like Alan Rickman! What a cool voice. I envy you. Unfortunately, I sound like a dork. Upvoted!

johnnysparkleface

The system you set up there would reduce a 60kg load to 20kg. 3 ropes between pulleys = 1/3 weight.

onesx

The internet's most popular pulley video

nathanclark

By increasing the number of pulley, the length of the rope used also this correct or do reply...🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼

rehnaiqbal

Sorry, Felix, you got it wrong. You are only using three of the four pulleys so it's a three fall tackle, not a four fall tackle. 3:1 advantage, not 4:1. Because those washing line pulleys only reeve one side - the side with the eye - you need to contrive another anchor for the rope. You could run the rope up to the main suspension. It'll work just as well.

Another point of order - you don't have to do knots tight, you just have to do them right. Without going back and watching like a hawk, I don't think the knots were up to much, either. The thing about a good knot is; you can untie it again, quite easily. A multiplicity of "easy" thumb knots (or Overhand knots) can be a knightmare to untie after any load has been applied. Sorry to be a grouch, but we Scout Leaders have standards.

rogerwhittle

Your calculations are wrong. If you're using 3 ropes, your advantage is 3:1, not 2:1. Lifting a 60kg load will require only 20kg of force, not 30. It's a pretty simple formula.

janne