I am trying to make a pulley system using motors, power distribution boards and potentiometers from Makers Supply. This is because I think that I will hopefully be able to achieve my childhood dream of being lifted to the ceiling of my room. But I don’t think it’s a great idea to trust a pulley made out of PLA to lift 100+ lbs, so I am reaching out to the Discord of 3d printer owners to ask if anyone knows of any cheap pulleys (or ways to make 3d printed pulleys) that are capable of easily lifting 150+ lbs (the maximum estimated weight of four N20 reduction gear motors). I am trying to make this project 100% bought from Maker’s Supply and 3d printed using PLA, but I am willing to buy things from Home Depot and other hardware stores (as long as I won’t go into debt by doing so) and/or buying stronger filaments (once again, as long as I won’t spend a ton of money doing so). My total budget for this project is about $80, and seeing as the parts from Maker Supply cost about $35 total, I have about $45 left to spend. I am willing to increase my budget a little, but not too much, so if anyone has any ideas that would solve my problem AND be inexpensive, please tell me.
In British slang are you “winding us up”? (@MalcTheOracle is that the correct usage?). I’m going to answer like you’re 100% serious, and I know there are people here who know A LOT more about this than me… but wouldn’t a motor that could lift 150+ lbs be at least $200 by itself? Also, I don’t think any of the parts on Maker’s Supply would be “robust” enough for this. Am I wrong?
Yup.
Education on YouTube.
Metal bolts are part of the winning team.
I’m using four N20 reduction gear motors with a torque of 857 combined with a pulley system, so it is the combination of four motors AND a pulley system that is lifting 150+ lbs, not a single motor.
My school has blocked the video, is there a way for me to download the files?
Also, I am 100% serious, once the parts from Makers Supply are at my house, and I have enough 550 cord, I am planning on building this.
Thank you! 
Please, tell us YOU do not weigh 150lbs.
Is this a cry for help?
Not to crush your “childhood dreams” but this will not happen with N20 motors.
You need to understand these motors are tiny.
The safety factor for hoisting personnel is generally 10:1 which means you need to design a systems that lifts 1500 lbs.
Are those the ones from Makers Supply?
No, I do not weigh 150lbs (thank god) but some of my friends do weigh about 130 lbs (they are about 6ft) and as I think it would be pretty funny if I could invite them over and then have them hanging from my ceiling above an air mattress…
Oh, my bad. How much are they capable of lifting?
140lbs is only 10 stone! Just 63.5kg.
By a looped end around their waist or foot, NOT their neck!
Gosh darn it 
I am planning on making some kind of red-neck harness so that if they somehow fall, they will face plant onto an air mattress…
I plead the 5th…
In all seriousness though, I do not plan to kill anyone with this. Although it would be a pretty interesting day for everyone in court…
This sounds like it could end up in a fail compilation on youtube.
You also need strong ceiling attachments and someone familiar with n20 motors said they don’t like to run reversed. Presumably they would be near their stall currents too and the PDB with one motor in stall is outside its rating I think.
An air mattress might not provide much protection either if dropping from 6 or 7 feet unless it’s special built to take a high pressure when a body falls onto it.
Don’t know your age but if you are a minor, please discuss this with your parents before doing it. And might as well ask - video. Good luck, too.
I knew you guys would all show up with the facts, I just had to stall him until you got here.
(@3dPrintingKid I’m joking and I seriously think people enjoy the topics you start)