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The following are just a few commonly used manual and electric tools, introducing their correct usage methods and safety precautions:
1. Metalworking hand hacksaw: Select appropriate saw blades to match the working object, such as using 14 teeth per inch to cut solid or thick soft metal; 18 teeth per tool steel, iron pipe, hard metal, etc; And 24 teeth per inch are suitable for sawing metal plates, metal pipes, and fine iron bars. And push the saw forward and gently lift it when pulled back.
2. Wrench: ① A wrench of appropriate size should be selected according to the nature of the work. ② When using a adjustable wrench, force should be applied to the fixed edge and never towards the movable edge If the wrench opening is worn or if there is slipping during use, it should not be used again to avoid slipping and injuring hands Do not use a wrench as an iron edge to strike. ⑤ Do not add a pipe to the wrench handle to increase the torque of the wrench.
3. Driver: ① It should match the size and shape of the screw head groove and choose an appropriate driver. ② The handle of the screwdriver cannot be struck with a hammer, and any damaged handle should be immediately replaced Do not use a screwdriver as a chisel or lever. ④ Electrical drivers should be used to test current, and general drivers should not be used to test high-voltage electricity. ⑤ The blade of the screwdriver cannot be ground to avoid damaging the hardened surface. ⑥ The screwdriver should not be placed in the pocket of clothes or pants to avoid injury in case of collision or falling.
4. Pliers: ① Pliers are only used for fastening, embedding, and removing various pins and nails, as well as cutting or tightening various wires. ② Pliers cannot be used to tighten or strike bolts or nuts The grip of the pliers cannot be tapped or extended to increase the clamping or cutting force.
5. Portable electric drill: ① The drill bit must be tightened with a wrench that meets the specifications. ② Before starting the electric drill switch, the electric drill must be firmly held. ③ When the electric drill is not in use or when replacing the drill bit, the power should be turned off before putting it down. ④ When finishing work, the drill bit should be removed first. ⑤ When applying pressure to the drill bit, the force should be moderate. If the force is too large, it may break the drill bit or reduce its operating speed. If the force is too small, the drill bit is prone to wear. When drilling quickly, the pressure must be light to facilitate smooth perforation. ⑥ When drilling small workpieces, the workpiece should be fixed with a fixture and never be held by hand for drilling. ⑦ When using an electric drill, do not wear loose clothes, tie ties, scarves, or gloves. Long hair should be tied up properly.
6. Portable grinding wheel: ① Before use, check whether the grinding wheel is broken, rotating improperly, the grinding disc is unbalanced, and the guard is loose. ② Wear goggles or face shields when grinding Both oneself and others should avoid the direction of grinding wheel rotation to prevent flying debris or splashing of grinding wheel fragments After cutting off the power supply, the grinding wheel cannot be ground again, let alone accelerating the grinding wheel to stop in this way.
7. Electric soldering iron: ① The tip of the electric soldering iron should be kept clean and free of debris. ② Do not knock to avoid electric leakage due to the rupture of the insulated magnetic tube It is advisable to use a 30-40 watt soldering iron for transistor components. ④ Electric soldering iron should be placed on a bracket or insulation when not in use. ⑤ The temperature at the tip of an electric soldering iron is very high, and attention should be paid to avoiding burns or getting close to flammable materials that can cause a fire.