The use of the old brake disc for forging is a fairly common topic among foreign masters and not only. Such steel includes various additives that greatly increase its strength. Of course, a knife made of such steel is also quite durable, however, the question of sharpening it to a razor state remains unknown. The author forged the knife from the disk, thereby improving the quality of the metal for making the knife. If you are interested in the project, I propose to study it in more detail!
Materials and tools used by the author:
Material List:
- brake disc from a motorcycle;
- a tree for overlays;
- brass rods;
- epoxy adhesive;
- oil for wood.
Tool List:
- belt grinding machine;
- oven and blacksmith tools;
- oil for hardening;
- grinder;
- drilling machine;
- tape cutting machine.
The process of making a knife:
Step one. Preparation and forging
The disk from the motorcycle in its shape is not bad for making various interesting knives. So, the author decided to make the well-known “claw knife”, which has a curved shape, along with the knife in question.
To begin with, mark the desired area on the disk with a marker, and, armed with a grinder, cut off the desired piece.
The author took quite a bit of effort to set the shape of a knife by forging the material. In addition, by forging we also form primary descents, thereby we will improve the cutting qualities of steel. As you can see, the blade turned out to be interesting, with rather attractive holes.
Step Two Completion
After forging, we refine the contour of the knife, here you will need a grinder with a petal nozzle or use a thick disk for grinding work. As for the planes, their author deduced using a belt sander. We also draw down the slopes of the blade by eye, a belt sander will also help you with this.
When grinding, it is better to keep the blade along the grinding belt, otherwise the belt will be cut. It is only possible to hold the blade carefully against the belt when sharpening the blade, and this must be done very carefully. Usually, the seam clings to the blade, as a result, either the knife is knocked out of the hands or the sanding belt is cut.
At the end, we drill holes for the pins in the handle area, you must remember to do this before hardening.
Step Three Quenching
We temper the blade so that the blade holds the sharpener well. The author used the classical method for hardening; steel was heated to a yellow glow and cooled in oil.Engine oil is suitable, and it is possible to use development. After quenching, if it turned out, it is advisable to heat the steel until a straw-colored oxide film is formed, this is a temperature of about 200 ° C. The right steel will spring, and the blade will cut perfectly.
Step Four Handle assembly
We collect the handle, the area of the handle must be well cleaned and degreased. The author cut out two blanks for wood lining and glued them with epoxy glue. We also definitely use pins, it will allow you to securely fasten the pads, the author used brass rods.
When the glue hardens, with the help of a file or a grinding machine, we form the desired shape of the handle and carefully grind it to a smooth state using sandpaper. In the end, it will remain to soak the tree with oil, now it looks great and is not so afraid of water. That's all the knife is ready, if desired, you can sharpen the blade with the help of whetstones. The knife looks great, in everyday life it will be useful, and while fishing you will surely surprise your colleagues with it. This is the end of the project, I hope you homemade I liked it, and you found useful thoughts for yourself. Good luck and creative inspiration, if you decide to repeat this, do not forget to share your ideas and homemade things with us!
