A simple homemade drill with only three components
I got an engine for a sewing machine on occasion. The engine is equipped with a pedal with which the speed is regulated. And I had the idea to make a drill out of this engine.
I have a flexible shaft, I bought it several years ago on aliexpress, it remains to adapt it to the engine.
To begin with, I decided to test how it would work and hastily fastened the shaft.
The motor shaft and the flexible hose have the same diameter - 6 mm. I picked up the bushing so that both shafts fit tightly into it. I twisted it with a wire so as not to separate during work and tried it with different attachments.
Rotary burrs proved to be good, but for sanding wood with sandpaper, the rotation speed is too large and it is easy to get burns on hard rocks. Although there is an adjustment of the rpm using a pedal, it is not always possible to keep low rpm for a long time.
The sewing machine motor has a power of 150 watts. and a rotational speed of 9000 rpm. This is quite enough for the drill to work with wood.
After the first testing, I decided to see if it might be easier to buy a similar hanging drill.
Began to look at what is on sale. The most famous brand of hanging drills - FOREDOM. Original cars cost 20-30 thousand rubles. Looked at Aliexpress similar drills, the prices came across about 3000 rubles.
Think: "It's okay, now I will choose a suitable configuration and order"
I began to choose from offers for 3000 rubles. It turned out that they had delivery of about 7 thousand. Offers with free shipping started at 6.5 thousand, but after reading the reviews, I realized that this was buying a pig in a poke.
As a result, I decided to finalize the homemade product and work with it, and then think about an expensive tool.
As a result, I needed three components for this homemade drill - an engine complete with a pedal, a flexible shaft and a homemade bushing for connection.
Why am I not considering bombs like "Dremel".
Most of them are good devices, but personally I just can't get used to the fact that when lowering revolutions, they drastically lose power, and at high speeds it is easy to burn when working with a hard wood.
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Alexander.
P.S. I also invite you to your site.