Materials:
- T-beam;
- long flat file for metal;
- steel strip with a thickness of 5 mm;
- steel round timber 20 mm or thicker;
- M10 bolts – 10 pcs.;
- long nut M10;
- nuts M10 – 4 pcs.;
- intake or exhaust valve of an internal combustion engine.
Making lever scissors
A small piece of literally 23-25 cm is cut from the T-beam, no more.
Holes are drilled in its base on both sides for fastening to the desktop. You will need to make 4 holes with a 10 mm drill.
A flat file is used to make cutting knives. You need to cut 2 plates of 10 cm each from it. It is important that they have the correct rectangular shape, so when cutting, the beveled edges of the file are discarded.
In the blanks for the knives, you need to drill 2 10 mm holes for attaching them to the scissors.
They are not made in the center, but offset to one edge. Given the quality of the file steel, drilling will not be easy. It is important to add water or oil so as not to damage the drill.
The slopes on the drilled workpieces need to be ground off. Please note that they are done on one side only.
One knife is screwed to the brand, in which holes are made beforehand, and the thread is cut. The protruding ends of the mounting bolts are cut off.
2 plates are cut from a steel strip. One of them is made wider and with a rounded corner.
It needs to be welded through a jumper from the same strip to the brand. The remaining knife is screwed to the second part. In this case, you need to first cut the thread in it, and cut off the protruding ends of the bolts. Then it is connected through a bolt to a plate welded to the brand.
The resulting design is complemented by two narrow arms from the same strip. They are connected to each other with a bolt and attached at their ends to a welded plate, as well as to a lever with a knife.
A round piece of wood is welded to the power lever responsible for spreading the scissors, which will serve as a handle. The longer it is, the easier it will be to press with your hand when cutting metal.
To prevent the workpiece from bending when bringing the knives together, an adjustable stop is made for it. To do this, a through hole is drilled in the center in a long M10 nut. Next, 2 bolts are screwed into it.
The cap of one of them is welded to the scissors.
A valve is inserted into the hole of the nut, the sole of which will serve as a stop. Its position is fixed by tightening the free bolt.
The resulting scissors do an excellent job even with thick metal. If necessary, their knives are removed and sharpened.Since they are made from a file, they are harder than most cut metals, so they rarely become dull.
