16 / 02 / 2021 | Videos

Making a portable air compressor



A portable air compressor is our new creation, numbered 0116. It is a structure that can have multiple uses in brief tasks that air needs to be provided. The benefit of this structure is that it does not need electricity provision as it works with a battery thus it makes it easily to be used and more functional. 

Initially, we used a 12v compressor to connect it on two 5litred- containers taken by old fire extinguishers. After we had connected the two containers the one with the other and with the air compressor, we put a pressure switch that switches off the compressor when it reaches 120psi pressure. Also, for our own safety, we put a relief valve 8-12 bar. Having supported by an air regulator, we are able to set the air pressure that exerts from the tanks according to the tool that we use the certain time. 

Finally, we placed a fast coupling before the point, where the air exits, on which we connect quickly and easily the tool that we need. Modifying the current valves existed on the old fire extinguishers, we found out a clever solution of the problem how the humidity can exit the tanks. 

To sum up, to try our structure, we used an air stapler gun that worked amazingly well. Then, after we had regulated the pressure at the 3 bars, we tried our airbrush and we made the make it extreme logo on a wood having excellent results. The outcome and the functionality of this structure is amazing and we are very pleased with the result.

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27 / 01 / 2021 | Videos

Making a gear selector



Besides of an interesting structure, the project 0115 reminds us our childhood dreams that we did not manage to fulfil. The making of a gear selector system by pressing buttons from a motorcycle steering wheel is an exciting and interesting procedure. 

First, we started creating it by taking 2 starter solenoid from 2 broken starter motors. Then, we removed all the pieces of the solenoid that were unnecessary for our structure and we used only the coils that after they are 12vdc power supplied, they become powerful electromagnets. Next, we placed these electromagnets in an aluminum rods that we made on the lathe having 25mm distance the one from the other. 

The axis passes through the coils and it is moved forward and backward according to which electromagnet is activated each time. When there is no electricity in the coils, the axis is in the middle and it can be moved both forward and backward. Later, we connected the axis of our structure to the gear shift of the motorcycle. The rest of the structure was stabilized on the framework that we made to present the video. 

Our system is connected with two buttons. The one button increases the gear while the other one decreases it. This structure is not only interesting but it is also very useful as it enables us to change gears without being close to the machine. It is even useful to disabled people who cannot adjust the speed easily of their wheelchair.

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06 / 01 / 2021 | Videos

Making a tire vulcanizing machine



In this video we are presenting the making of an electric machine, called ‘vulcanizer’. This machine is used to repair punctures, weld two tires and in other tasks.

This machine is useful to us for making tires that we can’t find in the market and they need to be custom-made. For example, we needed such a machine to make a tire for the monowheel.

The welding is done by exerting pressure and heat on the surfaces that we want to weld. To achieve the temperature we need, we made two aluminum dies and we put elements taken from coffee machines in them. Also, to set the right temperature we placed thermostats at 160°c.

Finally, for exerting pressure on the tires, we put an air piston of 63mm. On the machine, we could place a timer switch and adjustable thermostats for a better performance of our machine. Although the construction with the number 0114 is ready and we are going to see it work in the following videos, very soon!!!

























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01 / 12 / 2020 | Videos

Making a split nut



In our job we daily meet various kinds of screw nuts like heavy hex, nylon insert lock, jam, wing, cap, square, prevailing torque lock, coupling, slotted and many other.

In this video, we are making a screw nut that is consisted of two parts for an English wheel restoration. This two-pieces nut is a part of a mechanism that we took into consideration to make our English wheel ergonomic and usable. The reason why is consisted by two parts is that both sides of the screw have bigger diameter than the point where the fold is so it is impossible to be placed as any other common nut.

Initially, we created the spots where the two pieces are connected. After we created these spots we cut the piece into two other pieces. Then, we screwed the two pieces together again and we modified them on the lathe till reaching their final form. On that piece, we made some space where  a lever can be placed to exert more power. At these two sides of this odd nut, we made sockets for two thrust bearings. The purpose of these bearings is to absorb the  rubbing from the vertical power exerted by the screw during the function of the machine.

Afterwards, we separated the nut into two parts and we put them in the oven that we made to harden and blueing in order to make the nut hard and resistant to oxidation. Later, we put the pieces to the English wheel and the outcome of it was amazing as the engine was working in excellence. Spinning the nut, the die of the English wheel below approaches the die above and vice versa. The mechanism is very fast and convenient and the restoration is excellent!

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01 / 11 / 2020 | Videos

Making a spindle sander



Spindle sanders are widely known machines, which are used for rubbing curvy pieces. The philosophy on how the rubbing is done is simple as cylinder sandpaper is being spinned by a motor while another motor is lifting up and down the sandpaper which smoothes the surface that comes in contact. 

In our case, we chose a motor taken by an old treadmill 240v dc and with power 2hp. It is a quite fast and strong motor having a good performance in using it. We also applied a collet er32 on our motor and we placed the components of various sizes for various sized sandpaper. As it was previously mentioned, while the motor is spinning the sandpaper a smaller motor is moving the other motor up and down. 

Achieving a smooth conduct of the movement, we used linear bearings 20mm id. The second motor that we chose is a wiper motor with two gears, a fast one and a slow one. In this way, we have the option to choose a faster or slower move for a better outcome. 

The table of our machine with the number 0112 was made by iron plate of 10mm thickness. By just using a simple mechanism, we managed to have a table which will be able to incline and rub curvy pieces which are variously curved and not just 0 degrees. 

Finally, there is still potential to set the spins on our spindle motor and that makes our machine more effective and secure. Even though, our creation is low in cost it was very time consuming to be made but we have reached our aim with absolute success giving us the pleasure of an exciting constructive journey.

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