Most people are not trained in the use of hand tools, which leads to repeated accidents and injuries. According to statistics, the damage caused by the misuse of hand tools is annually from 7% to 8% of all accidental injuries. Therefore, for various widely used hand tools and simple power tools, it is necessary to understand the methods of their correct use, treat them with care and pay attention to safe use.
The following are just a few of the most commonly used hand and power tools, with a description of their proper use and precautions:
1. Bow saw for metal
Choose a suitable saw blade for the joint work, such as 14 teeth per inch for sawing hard or thick soft metal; 18 teeth per inch for eastern and western steel, iron pipes, hard metal, etc.; 24 teeth per inch. suitable for sawing metal, plates, metal pipes, thin iron bars. And push the saw forward, and lift it quietly as you pull back.
2. Wrench
① Select the appropriate standard key according to the nature of the operation.
② When using an adjustable wrench, force should be applied to the fixed side, not the moving side.
③ If the key hole is worn or slipped during use, do not continue to use it to avoid slipping and hurting your hands.
④ Do not use a wrench as an iron curb to strike.
⑤ It is not possible to put a tube on the end of the wrench handle to increase the wrench's torque.
3. Screwdriver
①The size and shape of the slot of the screw head must match, and the appropriate screwdriver must be selected.
②The screwdriver handle must not be struck with a hammer. If the handle is damaged, it should be replaced immediately.
③ Do not use a screwdriver as a chisel or lever.
④ Use an electric screwdriver to test current, not a conventional screwdriver to test high voltage.
⑤ The cutting edge of the screwdriver must not be ground to avoid damaging the hardened surface.
⑥The screwdriver should not be placed in the pocket of clothing or pants to prevent injury from being hit or dropped.
4. Pliers
① Pliers are only used for fastening, installing and removing various pins and nails, and cutting or tightening various wires.
② Do not use pliers to tighten or strike bolts or nuts.
③ The clamping or cutting force cannot be increased by striking or extending the handle on the handle of the pliers.
5. Jackhammer
① To tighten the drill, you must select a wrench according to the standard type.
②Before recommending the switch of the electric drill, the electric drill must be firmly held.
③ When not using the electric drill or when replacing the drill, you should turn off the power before putting it down.
④After finishing work, you should remove the drill first.
⑤ Push the drill with moderate pressure. Too much force may break the drill or reduce the working speed of the drill. If the force is too low, the drill can wear out easily. When drilling fast, the pressure must be low so that the hole can be passed smoothly.
⑥ When drilling small work objectsthe workpiece should be fixed with a fixture, and it is absolutely impossible to hold and drill manually.
⑦ Do not wear loose clothing, ties, scarves, or gloves when using an electric drill, and long hair should be tied up well.
6. Portable grinding wheel:
① Before use, check whether the grinding wheel is broken, the shaft is not installed correctly, the grinding wheel is not balanced, and the protective cover is not fixed.
② When sanding, be sure to wear goggles or a mask.
③Yourself or others should avoid the direction of rotation of the grinding wheel to prevent flying chips or fragments of the grinding wheel.
④ Once the grinding wheel is disconnected from the power supply, it cannot be sharpened again, let alone speed up the interruption of the grinding wheel in this way.