07 / 04 / 2018 | Videos

Angle Grinder Hack 7



This time we came up with just a simple, cheap and pleasant creation to add another video in our collection of the category of angle grinder hacks. Our angle grinder with the number 0080 can be converted into a belt grinder and belt sander. There is no need to use any specialized machines to make this structure, it has been made just to please some people who either they do not have any special equipment or they just want to make an easy and not time consuming gadget providing them with fun making it.

Firstly, we started our structure making a wheel with diameter 50mm and 60mm width using a piece of a tube that is used on a structure of hydraulic pistons. The reason that we used this particular kind of tube is because it has greater accuracy compared to a regular one. Also, it is thicker and this allows us to make the proper corrections and to improve the normal spinning of this metallic wheel in case it occurs some eccentric rotation. 

In addition, we welded a screw taken by an old angle grinder with a fold of 14m to be screwed on the axis of the angle grinder without risking it to be disconnected during its function. This is how we created the motivational power that urges the glass paper belt to spin. 

Also, on the angle grinder we fixed a metallic base that is stabilized by a screw where the handle of the angle grinder is placed and by putting another screw, the metallic base holds tightly the point, where the bumper of the angle grinder is located. Thus, we made a secure hold on the added tool. On this basis, we also made a metallic fork that is able to move 2cm backwards in order to enable the glass paper belt to be placed. This fork can be also pushed forward using a spring. At the front side of the fork, we put a wheel taken by a small skateboard. We used this wheel because of its ideal shape and because it is a component that is easy to find.
However, its only disadvantage compared to an aluminium wheel is that it is less tolerant to the loads as well as to the high temperatures that occur. 

Placing the belt on the two wheels and activating the angle grinder, the belt spins in high speed giving us the opportunity to rub the objects that we want on it. Moreover, we made a basis on which our machine remains stable on the workbench making it usable and portable. Also, we made a basis on which we place all the material that we use for our work in order to be able to process them with a great convenience. 

Finally, changing position of our machine in relation to the angle grinder, it is converted from a belt grinder into a portable, belt sander for narrow points. While spending our time pleasantly, we created a structure for fun mostly which also has amazing capabilities.

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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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