31 / 03 / 2018 | Videos

Making a Ball Mill



The milling of the materials is a very useful procedure in various domains in life as well as in the constructive domain. The uses of milling materials are very important for various products and projects. For example, some of them are the fireworks, the cold castings, the milling of colours, the raw materials for making a concrete surface, the milling of glass during the procedure of glass blasting and many other uses. Therefore, we decided to make our own machine according to our needs for our own use in future constructions.

Ball mill is a machine, which usually has a cylindrical tank, in which some marbles are placed that when they collide with the material that is mixed with them for milling; crash it and destroy it. The marbles that are used can be made of steel, stainless steel, rubber ceramics or other materials. In this case, we used iron balls with dimensions 15mm, 20mm and 25mm.

Regarding the tank, we used an old, fire extinguisher, on which we put a door, where the marbles and all the materials for milling are placed. Also, to manage the rotation of the tank and the crash of the marbles, we used a motor DC 1,5 hp which was attached to a spin reducer 1/20, meaning that in every 20 spins of the motor the reducer will be rotated completely as well as the tank and the marbles will be also rotated completely. This results to the reduction of the spins and to the increase of the torque, therefore it gives the potentiality to the heavy marbles to be rotated with all the materials used for milling managing the proper, full rotations. 

In addition, for the full adjustment of the spins, the motor was connected with a volt regulator, which controls the spins of the motor from 0 till its highest speed in order to choose the right spin of the bucket according to the material that we used to mill. The structure of our machine is constituted with square tubes 50x30x2mm and its width is 70cm with 110cm length and 70cm height.

As in every making of a machine made by the ‘make it extreme’ team, we used the indicative colours of green and black and in this one, too with the number 0079. At the first trial, we put some filings of aluminium that after three hours of milling in our machine, we removed them from its bucket with the form of dust. Finally, as you will see in our video, we have not showed the milling of any other materials as the time for making the video was limited. At this point, another machine made by our team was completed.

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18 / 03 / 2018 | Videos

DIY electric rotary gun | 50 shots per second



This time’s project was made with a great, constructive interest as its construction required a lot of imagination, concurrency and accuracy. Our aim was to make an electric gun that would be able to shoot 50 bullets per second. Although, initially the speed of the bullets seemed inconceivable after having our calculations made, we saw that it might be possible. 

It is widely known that electric guns have a great potential regarding the repetitive bullets’ shooting. Therefore, we decided to make a rotary electric gun. It is the second gun that the ‘make it extreme’ made as the first one was the ‘homemade antidrone catcher’, which pleased our viewers a lot.

Our structure was started by taking a piece of scroll air compressor that is an aluminium piece, on which there is a spiral aluminium wall of 3.5mm tall. The spiral wall forms the barrel of our gun as inside the trigger, the bullet speeds up with the help of a piece which is rotated by the motor. The motor rotates the piece that urges the bullet and then the bullet is riffled at the end of the spiral barrel. As longer the route that needs to be covered by the barrel is as longer the speeding of the bullet will be according to the use of the proper motor. The motor that we used is not very strong as it is only 30 w 24 volt 3000rpm. Knowing that in each rotation the gun might insert a bullet in the barrel we came to the conclusion that theoretically, at 3000rpm 3000 bullets will be entered in the barrel reaching our initial aim which is 50 bullets per second.

Underneath the spiral barrel, we put the bearing in which there is an axis that rotates the mobile part of the gun and this is a disc with a notch that indicates the point where the bullet is urged and speeds up in the gun barrel until its exit. On the mobile, aluminium plate that is rotated, there is a box, where the bullets are placed. By pulling the trigger, the bullets pass through the rotary plate and start their way through the barrel.

The motor is placed at the back side of the barrel and spins the mobile part of the gun through a drive belt and of pulleys. To give motion to our motor, we used the batteries 18650 which are exceptionally light and are charged very quickly as well as perform better than any other type of battery.
Moreover, our gun is capable of shooting spherical shots both plastic and metallic from 6mm to 9mm. In our video, we used plastic shots 8mm as our goal was not the damage but the constructive philosophy of making this gun and the entertainment that we earned during the procedure. 

In the end, we got amazed with the speed of the gun as well as with its power considering its relatively weak motor. Achieving such a great success in this project, we are motivated enough to already plan to make a bigger and more powerful gun in the future.

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19 / 02 / 2018 | Videos

Hydraulic press machine


The great usefulness of this machine led us to the creation of the video 0077. For many people the hydraulic press that is presented on this video is just a machine with an amazing power but for the ‘make it extreme’ is a precursor of the amazingly, big press that we are planning to make in the future. However, this doesn’t mean that the current press is not useful enough as it is capable to meet the needs of the user covering the 90% of the tasks required for its use.

The hydraulic press is a metallic structure that is resistant to tensile loads and on its top, there is a hydraulic plunger that is able to exert a big, compressed load on an object that is located inside it. Also, it is useful for many tasks like compressing objects, jamming two metallic pieces to connect them in order to give a shape to metallic plates, unjamming and jamming the bearings as well as cutting metal pieces and other kinds of material and generally for multiple uses that require great compressing power.

The procedure of making our structure began since we had cut the pieces of our metallic press using a bar of 6 metres long, 15 cm width and 12mm thick and a metallic beam UPN 6 metres long, 16cm width and 7cm tall. The height we defined for our press is 180 cm and 83 width with net working width in 70 cm. Each piece which is 180cm tall was pierced 7,5 cm making holes of 35mm to have various gradations at the level of the task.

At the top of the metallic structure, we placed a hydraulic plunger of 80 mm width that provides us with power of about 15 tonnes. This plunger moves up and down having a distance of 40 cm taking hydraulic pressure by a power pack that we made in one of our previous videos. The power pack with the video no. 0068 can reach the 300 bars pressure and it can connect with other machines which use hydraulic plungers.

At the end of the plunger, we made a thread to be able to change the ‘‘heads’’ that exert pressure so that we can choose the proper one for each task. Another component that we used and it makes our press more ergonomic is a metallic ring which is placed at the end of the plunger. Two chains are also put on it to connect the working table of the press with the plunger so that the table can be moved up and down with equal power with the plunger. This has been done to avoid doing the whole procedure by hand straining the user’s body.

Finally, we completed our machine by painting the press in the green and black colour and we are very pleased for our creation.

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29 / 01 / 2018 | Videos

Making a big clothespin



This huge clothes pin was the structure that we made the previous week with the number 0076. We took the decision to involve ourselves in the procedure of making such a structure in favour of a very good friend’s request. Besides of being a decorative piece in his store, he will also use it to place pieces of his work as his working place is also his showroom.

To start with, we collected 4 pieces of 30cm width and 240cm length made of pine board. Then, we cut all of them to shape a clothe pin to avoid declination of the one piece to the other. Next, we cut them in stripes of 40cm that formed the width of the clothespin. Also, to shape the circles, we put an aluminium stick on the router and we used it as a protractor. While, to shape the width of the circles, we cut the 12 pieces of each circle of 40 cm length inclining at the two sides at 15 degrees. 

Lastly, as we completely shaped the two sides of the clothespin, we made a gigantic spring to connect them, making our big clothes pin functional. Making a rough machine to make the spring and using a metallic, circular stick of 14mm and 6m length, we managed to make this big spring. Afterwards, we painted the spring in yellow colour and the wood in dark grey. In conclusion, we must admit that we are unbelievably satisfied with the outcome as we created an amazing piece of furniture.

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15 / 01 / 2018 | Videos

Making air vane motor



In our new project, which is a motor that moves with the energy of the air, the pleasure that we receive during this project is double as besides the joy we got during making it, there is also the joy of recycling a system which is non-functional anymore.  This happened when we collected pieces from a broken air conditioning compressor taken from a car and from that we made a pneumatic motor, which can be used in our future projects.

The type of motor that we made is called ‘air vane motor’ and it can be used in various pneumatic tools and systems. Firstly, we started making it by taking the rotor of an old compressor as well as the vanes, which were divided right in the middle in order to enable the rotor to spin within the cylinder. We, also took the bearing of the old compressor to enhance the concept of recycling. 

Then, we turned two aluminium papers sized 100 mm in diameter and 50 mm in thickness to make them the place where the bearings and the o-rings will be placed so that the rotor to be rotated without making any noise, and to achieve a smooth move and keep the air inside the machine when it’s activated. Further, a cylinder was placed between the two aluminium papers that was taken by a tube that is used for making hydraulic pistons and it has great preciseness and smooth internal surface to make the vanes of the rotor slide smoothly on the walls of the cylinder keeping the air inside. 

The cylinder was placed at the centre of the two aluminium papers while the nests of the bearings were made 9mm away from the centre. Therefore, the rotor of the motor is located off centre in relation to the cylinder as a result on the one point of the rotor, the vanes are completely closed while at the exact opposite side of it, the vanes are completely open. In this way, when the air is inserted to the cylinder it pushes the vanes that are completely open and when the rotor spins, the air is exerted from the cylinder as a result we managed to have constant air provision. This procedure happens constantly so the spinning is constant as well.

Finally, there are two holes on the cylinder that work as the insertion and the exertion and they can work in reverse in order to change the torque of the motor’s spinning. Certainly, this functional motor was not just made to present its functionality but also to show to the public how it works. Also, we are aware of the fact that if we used vanes made of carbon fibre, a lighter rotor and many other things would increase the performance of this motor. Although, we should highlight that at 8 bars, the particular motor reached an exertion in about 3000rpm and a sufficient torque and compared to the amount of money that we spent to make it, we are sure that it worth every minute of the procedure of creating it.

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