DIY Saw Knife – How to Make a Circular Saw Knife

Having made the knife out of the saw with your own hands, you can get a cutting device at your disposal, whose performance is much better than that of the factory analogues. Making a knife with his own hands, he is given exactly the shape that the master is most comfortable with. Factory knives are beautiful, but not always reliable. There is no guarantee that they will not fail at the most crucial moment.

A homemade knife made from a disk, a hacksaw or from a saw to metal will last for many years regardless of the conditions of storage and use. Consider how to make a knife from metal parts factory production, what is needed and what should be paid special attention to.

  • Tools and materials
  • Rules for working with metal
  • Making a knife from the blade
  • Chainsaw knife

Tools and materials

Instruments
The raw material for the manufacture of a homemade knife can be any new or old cutting part made of hardened steel. As a blank, it is better to use cutting discs for metal, blades of hand and pendulum saws. A good option is an old chainsaw. From its chain, you can forge and cut a blade, in quality and appearance not inferior to the famous Damascus steel.

In order to make a knife with your own hands, you need the following equipment and materials:

  • Bulgarian;
  • grinder;
  • electric drill;
  • ruler;
  • hammer;
  • sandpaper;
  • sharpening bars;
  • files;
  • core;
  • epoxy adhesive;
  • copper wire;
  • marker;
  • bucket with water.

Separately, you need to think over the issue with the handle. The finished product should be comfortable in the hand.

For the manufacture of the handle is better to use:

  • non-ferrous metal (copper, bronze, brass, silver);
  • tree (oak, alder, birch);
  • organic glass (plexiglass, polycarbonate).

The raw material for the handle must be intact, without traces of cracks, rot and other defects.

Rules for working with metal

Work with metal
The raw material for the manufacture of a homemade knife can be any new or old cutting part made of hardened steel. As a blank, it is better to use cutting discs for metal, blades of hand and pendulum saws. A good option is an old chainsaw. From its chain, you can forge and cut a blade, in quality and appearance not inferior to the famous Damascus steel.

In order to make a knife with your own hands, you need the following equipment and materials:

  • Bulgarian;
  • grinder;
  • electric drill;
  • ruler;
  • hammer;
  • sandpaper;
  • sharpening bars;
  • files;
  • core;
  • epoxy adhesive;
  • copper wire;
  • marker;
  • bucket with water.

Separately, you need to think over the issue with the handle. The finished product should be comfortable in the hand.

For the manufacture of the handle is better to use:

  • non-ferrous metal (copper, bronze, brass, silver);
  • tree (oak, alder, birch);
  • organic glass (plexiglass, polycarbonate).

The raw material for the handle must be intact, without traces of cracks, rot and other defects.

Rules for working with metal

Work with metal
In order for the blade to be strong and elastic, in the process of its manufacture it is necessary to follow the rules for working with metal. They are as follows:

 

  1. Blanks should not have visible or hidden damage. Before you make a knife, blanks must be inspected and tap. The one-piece detail sounds loud, and the defective one is dull.
  2. When designing the shape of the blade must avoid corners. In such places, steel may break. All transitions should be smooth, without kinks. The cuts of the butt, the handles and the fuse must be set at right angles.
  3. When cutting and grinding it is impossible to overheat the steel. This leads to a decrease in its strength. Overheated blade becomes brittle or soft. During processing, the workpiece must be constantly cooled, completely immersing it in a bucket of cold water.
  4. When making a knife from the saw blade, you need to remember that this product has already passed the hardening cycle. Factory saws are adapted to work with the hardest alloys. If you do not overheat the fabric in the process of grinding and finishing, then it will not have to harden.

The blade shank cannot be made too thin. It is on this part of the product will be the biggest burden.

Making a knife from the blade

Making a knife
If the canvas is large and does not have a strong wear, then several blades of different purposes can be made from it. Spent time and effort worth it.

A knife from a circular saw with his hands is done in the following sequence:

  1. A piece is applied to the canvas, the outlines of the blade are outlined. Scratches or dotted lines are applied over the core marker. So the picture will not be erased when cutting out the workpiece and fitting it to the desired shape.
  2. Blanks are cut from the circular saw blade. For this, it is better to use a grinder with a disc for metal. Leave a margin of 2 mm from the contour. This is necessary in order to remove the material burned by the grinder. If the Bulgarians are not at hand, then the workpiece can be turned using a vice, a hammer and a chisel or a hacksaw.
  3. On the grinding machine grind all unnecessary. It is necessary to spend a lot of time on this process in order not to overheat the steel. To prevent this, the workpiece must be regularly lowered into the water until it cools completely.
  4. The blade is planned. Here you need to be careful to keep the contour of the knife, do not burn it and maintain an angle of 20 ?.
  5. All straight sections are leveled. It is convenient to do this by applying the workpiece to the side of the grinding wheel. Transitions are rounded.
  6. The detail is cleared from the burr. Grinding and polishing of the blade. To do this, use several replaceable wheels on the grinding machine.

Separately, it is necessary to dwell on how the pen is made. If wood is used, a monolithic fragment is taken in which longitudinal cuts and through holes are made. After that, the blank is placed on the blade, and holes for fixing are outlined in it. Fixing the handle on the blade is made using rivets or bolts with nuts. In the case of bolted connection, the caps of the hardware are recessed in the wood and filled with epoxy glue.

When the handle is assembled from plastic, 2 pads are used, which should be symmetrical. To give the knife originality plastic lining are painted on the inside. In the overlays you can make cavities filled with ornaments, products from non-ferrous and precious metals, small compasses and photographs.

After fixing on the blade, the handles are machined until they acquire the necessary shape and smoothness.

Chainsaw knife

Chains from saws are made of high-quality alloy, which perfectly tolerates prolonged friction and high temperature. The process of making a blade is long and laborious, but as a result a beautiful, unique and very durable knife comes out. The work will require a heavy anvil, brazier and charcoal. To make it easier to handle the red-hot billet, it is necessary to purchase forging tongs.

Making the blade of the chain of chainsaws should be carried out in the following sequence:

  1. Prepare a thick cloth and protective clothing and protective mask. Pour charcoal into the hearth and burn it with a special liquid.
  2. Fold the workpiece from a single piece of chain. In that place where there will be a handle, it is possible to add some pieces from a chain. It should be remembered that the result of the work should be a single monolithic product. Separately, the handle to the knife is not done.
  3. Put the workpiece on the coals. Provide air flow to raise the temperature. Wait until the steel becomes dark red. In this state, it becomes forging without losing quality characteristics.
  4. Take the hot chain out of the fire and lay it on the anvil. With a few strong blows, flatten it so that the links are fused together, becoming a single monolithic detail.
  5. Gradually, heating the billet in the furnace and giving it the desired shape with a hammer, forge a knife, which is marked with a handle and a blade. After cooling the workpiece to sharpen and polish it.
  6. Conduct hardening products. To do this, it needs to be red-hot again and immerse in cold water. After that you can finish the knife. Acid and engraving machine is used for this. The finished blade is polished again and washed in warm soapy water.

When making an independent blade, it is necessary to adhere to certain parameters so that the finished product does not fall under the category of cold arms.

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