At the most basic level, most workshop tools are just motors with the right attachments. But the details are often far from simple. [DuctTapeMechanic] took a worn-out clothes dryer, pulled out the electric motor from it, and converted it into a disc sander. The price is around $10. You can see all this after the break.

As you might imagine, owning a motor is only half the battle. You also need a way to install the thing safely and a way to secure the sandpaper. Although this will not bring the same challenges as a drill press, it does require some thinking. There are no threads on the motor shaft in the donor dryer, so a bolt and some welding time are needed to solve this problem. We suspect this is tricky because you need the shaft and bolt to be concentric and level.

Once you have a threaded shaft, the rest of the construction is weather resistant. A little carpentry and a little electricity. We may cover up electrical connections more. It seems that you want to know the direction of the motor rotation so that you can use the reverse thread if necessary. From the video, we think that his motor is rotating in the correct way, but we don't know whether this is always correct.

There are some satisfying aspects of building your own tools. If you are dealing with smaller things, we will see a miniature sander that may be convenient to carry around. If you want to go the other way, try to find an old floor polisher instead of a dryer.

If you think this is good, I have a dryer motor with a wire brush.

You can buy a shaft adapter connected with a fixing screw for a few dollars. Welds like this are unlikely to be sufficiently concentric or safe. That is not a closed motor. Any moderate use will cause a large amount of sawdust to enter the windings and around the bearings. There is a fire hazard. If you just close the motor, it will not be able to cool down normally. There is no insulation on the quick connector. Only a small area is exposed, but the voltage is 110 volts, which is unacceptable. You need a motor suitable for this application. Just cheaper. It is good to reuse materials. Insecurity is not good. Of course, I have done something like this. When I was 7 years old, there was no competent supervision. Higher standards are needed here. .

In fact, insecurity is also good.

I make a living by making electrical appliances. These motors are often exposed to large amounts of very fine lint. Lint is more flammable than sawdust. I have never seen burnt lint around or on the dryer motor. It's just lint.

Even if this is not the case, the dryer motor has a built-in self-checking thermal fuse.

It shook badly. I don't know the value of a disc grinder that cannot be directly ground.

With a little effort, you can straighten out the disc.

I hope these Hackaday articles carry security warnings. Even if the disc is not shaking, I would not believe that a small layer of MDF can safely hold that disc and make sure that it will never burst on my face. I like that he just takes a high voltage, runs a large enough motor, does not have any protection, and is willing to put his hands and face close. If I can find an online sander for 200 Canadian dollars from a good retailer, I'm sure there are a lot of Chinese-made machines that may be less than 50 dollars. I believe in those methods more than this device.

"I hope these Hackaday articles carry security warnings." Really? Is this your true thoughts? And don't you feel stupid to say this in public? strangeness.

Why does he want? *Do you* think this is silly?

It just doesn't work! We don't need more security warnings. A general warning of "life is dangerous" is sufficient. We have an organ called the "brain", and we can consider safety and necessary precautions when we build things. Of course, it is really important to use it correctly.

Remember to wear a safety tie!

Have you never heard of a random orbital sander?

The treadmill motor is also good

Some of them are DC, (yes, the fun in a small package has doubled!)

The first post was mysteriously deleted. OK. This is a good example of what should not be done. I counted four ways that it is not safe. How many can you find? Yes, I saved $10, but I was injured, electrocuted and caught fire. Good example.

The most dangerous thing is the disc itself. It is fixed by 1/4 inch thick old medium density fiberboard and nuts. At that moment...who knows how or where it will end.

Yes, I hate tracking people because they exercise their creative muscles, but it doesn't seem to be a great idea. I now count more than a dozen used disc sanders on Craigslist. The cheapest is Delta, at $65, and the most expensive is still hundreds of thousands of dollars cheaper than facial reconstruction surgery.

In addition, there are many desktop grinders for dangerous goods starting at about $20, although at this price they are best for grinding TIG electrodes, not others. Their quality is not, but at least their shafts are concentric, made from a solid stock, because they know their cheap wheels will surely fly away, and they even put a semicircular shield around them.

Hundreds of thousands cheaper than cosmetic surgery? But... the surgery here is free! Welcome to state-sponsored healthcare! If this is your best argument against this, you might as well give up.

I'm not sure, you are referring to Canada, where is there a 10-month waiting list for prenatal care? B^) When the government pays for your health care, the government decides your health care!

Oh yeah? I remember a Canadian had a heart attack in the United States. The Americans have done a good job repairing them. In Canada a few weeks later, they received a $80,000 bill.

Health care in Canada may not be the best, but if you are poor or bankrupt due to a health emergency, you will not die of street diseases. To receive this level of service, you must move to the Greatest Country on Earth™.

Sorry, buddy, I’m in the United States, where the cost of an unforeseen medical tragedy might even bankrupt the well-prepared. But I have no intention of giving up ;)

The wobble may come from the tilt bolts MIG welded to the motor shaft. Or MIG tack, it's hard to see if he really put a bead on it. If the welding fails, I don't want my face close. The welding of the galvanized bracket is not to be discussed, at least he is outside. What is that old saying? A man got a MIG welder, and suddenly everything is a nail? Something similar.

I like. For some people, this may be a different BTW sander...nothing.

The only reasonable reason for this is because you like it.

The skills needed to build it are always popular, and enough money can be made to purchase specialized tools in a short period of time.

I agree, mainly. However, it is also interesting to understand what is the smallest part that a tool can be broken down into, and to see how it ticks, so to speak.

In addition, in many underdeveloped areas of the world, if there are no other tools available, this will be a legal tool.

Well, I have to agree that there are many dangers in this build. However, if you read all the reviews and make your design safer, it may be a win for some low-budget stores. If our civilization collapses slightly, upgrading recycling will become very important in the future. Some people suggest buying cheap Chinese imitations. What if China stops exporting for any reason? I have dismantled some household appliances in the past. I save and reuse as much as possible. I cut away any flat metal panels, then used scissors to bend and cut them. Sometimes there are small reusable sensors, motors and activators. The controller is useless. I hope someone will launch a series of devices that use Arduino or open source software. This way I can eject it and reprogram it for other purposes.

Many years ago, HaD published an article about washing machines whose controllers have been replaced by Arduino.

This video involves something that absolutely annoys me when I really only have 10 dollars to spend on tools, and may actually use it as an alternative to buying a second-hand or dangerous sander.

This guy built this with a welder set up for more than $300. When I was young, I had a corded electric drill, a bucket full of spare parts, another bucket of sandpaper and some drill bits.

When you don't need any tools that cost more than $30 to manage it, you can brag about a $10 build. Because who built it.

In fact, if they use a nail gun tool (it's just a more convenient combination of hammer and nail), I don't mind calling it cheap, because people with only the basics can still use it. It's not well done as pointed out...I mean a simple case won't be very hard, and the disk really needs to be made of anything else...

It is more suitable to build such a building with ordinary odds and ends—the plastic lunch box is a ready-made shell, and only a few holes are needed in it. The fan to cool the motor is not difficult to obtain-even some openings can be created to point your room fan at it...and this disk material...even most personal computers and white goods Some very thin steel fragments are better for the case-knock a bead on the edge and knock stiffness on some ridges. However, as a dryer motor, it may already have a very good drum, you can use hand tools and work trimming-and then it can also be correctly installed on the shaft!

The bare motor will only be displayed when it needs to be cleaned, and there will be a sound of air from time to time. Every motor I have seen is air-cooled, and the windings and bearings are hidden. But they still become equally dirty in the wood product shop, turning into a small oven to cook the motor, because no one will see or take care of it from time to time.

A few years ago I used the adapter mentioned above to connect 1/2 or 3/8 axles to wheel-friendly threads and nuts. I use it with reels on large rusty metal, without shielding on the sides. The motor is held by both hands. So far, it is faster and more powerful than hand drills.

Many AC motors can be wired to run in either direction. I don't have a decent welder. If this is my project, I will let the motor run, then press the shaft on the drill bit fixed in the vise (or find some other way to make a center hole on the shaft), and then tap the hole. Since then, many hardware stores have disc sander accessories for electric drills that can be disassembled into sandpaper holders. In other words, I don't like large-diameter objects that rotate at high speeds, and AC motors like this are usually around 1800 rpm. I want a belt and a few pulleys to reduce it to 600-900 rpm or even lower, and suddenly this is no longer a simple project.

This is of course the way "Sergej Machansky" is made-if you are lucky enough to have access to any cable or connector, you can get a free electric shock.

I mean for God’s sake, just use any type of casing or cover it with tape, or at least put a carton on it (not ideal in the end, but better than nothing).

Although it may not be safe for those who have not developed safe working habits and/or do not use personal protective equipment, these things are effective for most people who were unable to shop online or access large hardware stores in the last century. . When I grow up, the washing machine motor is strapped to the workbench with a spindle adapter and grinding wheel. This is the only one nearby, and everyone uses it when they need to grind something up. It may be hard to believe, but nothing happened except a lot of work.

In other words, desktop grinders and sanders are quite cheap relative to the cost of the day, so if your needs are not just temporary, I suggest you buy one. In addition to safety factors, doing a good job is easier.

Am I missing a joke or should anti-climate be anticlimactic?

What did he say! ^^ My old man built one of them 30 years ago... and my grandfather had one before that... Why it appeared on hackaday is beyond my understanding! ...It must be a slow day!

Because of the use of drying motors, all idiots who claim to be unsafe...I have been using a disc sander driven by a drying motor since I was 7 years old; I am 51 years old and inherited a sander from my father He is 80 years old and his hands are not stable enough to use power tools. I agree that MDF (or HDF) discs are a bad idea. Mine uses a steel disc/mount that you can use to connect to a radial arm saw. The dryer motor comes from a dryer in the mid-1960s, actually before I was born, but I was not allowed to use power tools until I was 7 years old. Echodelta is correct, the air injection in the compressor is all you need to keep it clean.

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