The correct use of several commonly used hand tools


1. Metalworking hand bow saw: Use appropriate saw blade […]

1. Metalworking hand bow saw: Use appropriate saw blades for the work, such as 14 teeth per inch for cutting hard or thick soft metals; 18 teeth per inch for tool steel, iron pipes, hard metals, etc.; and 24 teeth per inch It is suitable for sawing of metal plates, metal pipes, and thin iron bars. Push the saw forward and lift it slightly when pulling it back.
2. Wrench: ① The wrench of appropriate size should be selected according to the nature of the work. ②When using the adjustable wrench, apply force to the fixed side, never force to the movable side. ③If the opening of the wrench is worn or slips during use, it should not be used anymore to avoid slipping and hurting your hands. ④Do does not use a wrench as an iron to strike. ⑤Do is not put a pipe on the handle end of the wrench to increase the torque of the wrench.
3. Screwdriver: ①The appropriate screwdriver should be selected according to the size and shape of the screw head groove. ②The handle of the screwdriver should not be hit with a hammer. If the handle is damaged, it should be replaced immediately. ③Do does not use the screwdriver as a chisel or lever. ④An electric screwdriver should be used to check the current, and a general screwdriver cannot be used to check high-voltage electricity. ⑤The blade of the screwdriver should not be ground to avoid damage to the hardened surface. ⑥The screwdriver should not be put in the pocket of clothes or trousers to avoid injury from collision or fall.
4. Pliers: ①Pliers are only used to fasten, insert and remove various pins and nails, and to cut or tighten various wires. ②Pliers cannot be used to tighten or knock bolts or nuts. ③Do does not tap or lengthen the handle of the pliers to increase the force of clamping or cutting.
5. Portable electric drill: ① The tightening of the drill bit must be a wrench that meets the specifications. ②Before starting the electric drill switch, the electric drill must be held firmly. ③When the electric drill is not in use or when changing the drill bit, turn off the power before putting it down. ④The drill bit should be unloaded when finishing work. ⑤Apply pressure to the drill bit with moderate force. Too much force may break the drill bit or reduce the speed of the drill bit. If it is too small, the drill bit will be easily worn. When drilling through quickly, the pressure must be light to make the hole smooth. ⑥ When drilling small work objects, the workpiece should be fixed with a fixture, and never hold the drill with your hands. ⑦Do not wear loose clothes, ties, scarves, or gloves when using the electric drill. Long hair should be tied well.