tape measure

A screwdriver is a tool used to turn a screw into place, usually with a thin wedge-shaped head that can be inserted into a slot or notch in the head of the screw, and is one of the essential hand tools in our daily life. Now the screwdrivers on the market are often sold in the form of a set combination. Many friends don't know how to choose a screwdriver set when choosing a screwdriver set. Commissioner Jingmu will introduce the following little knowledge about screwdrivers to you, hoping to help you!
 
First, the type of screwdriver
According to different head types, screwdrivers can be divided into one-word, cross-shaped, rice-shaped, star-shaped (computer), square head, hexagonal head, Y-shaped head, etc. Among them, the one-word and cross are the most commonly used in our lives, such as Installation and maintenance are all used. It can be said that a screwdriver is used wherever there are screws. The hexagon head is not used much, and the Allen wrench is commonly used. For example, many screws on some machines have internal hexagon holes, which is convenient for multi-angle force. There are not many big star-shaped ones. Small star-shaped ones are often used for repairing mobile phones, hard drives, notebooks, etc. We call small screwdrivers watch batches. Star-shaped T6, T8, cross PH0, PH00 are commonly used.
 
2. How to use the screwdriver
1. Before use, wipe the oil on the screwdriver handle and mouth end to avoid accidents caused by slipping during work, and wipe it clean after use.
2. The correct method is to hold the screwdriver with the right hand, with the palm of the hand against the handle end, so that the mouth end of the screwdriver is in a vertical state with the bolt or screw notch.
3. When starting to loosen or tighten at the end, apply force to compress the screwdriver and then twist the screwdriver with wrist force; when the bolt is loose, press the handle of the screwdriver lightly with the palm of your hand, and quickly turn the screwdriver with your thumb, middle finger and index finger.
4. The end of the selected screwdriver should match the notch on the bolt or screw. If the mouth end is too thin, it is easy to break, and if it is too thick, it cannot be fully embedded in the groove, and it is easy to damage the knife edge or the bolt groove.
5. A screwdriver is a hand tool for tightening or loosening notched bolts or screws. There are several types of screwdrivers, such as a zigzag screwdriver, a cross-shaped screwdriver, and an offset screwdriver.
 
3. How to choose a screwdriver
1. The screwdriver that screwed the screw is usually not a good screwdriver. Screwing the screw means that the screwdriver is not accurate enough, so that the force-bearing surface between the cutter head and the screw groove becomes the force-bearing point. Therefore, the selection of screwdrivers depends not only on hardness and toughness, but also on production accuracy.
2. When buying a screwdriver, first of all, it depends on whether you want a precision screwdriver or an ordinary screwdriver. Second, look at personal budget, affordable price and personal definition of "good".
3. Precision screwdrivers usually include models below 3mm in a word and below PH1 in a cross. They are used to disassemble and assemble notebooks, mobile phones, cameras, repair glasses, etc., and are used to tighten small screws.
4. Ordinary screwdrivers are usually slightly larger, including models with a word of 3mm or more and a cross of PH1 or more. They are used for daily repair of home appliances, such as TV sets, washing machines, and assembling furniture.
 
Four, screwdriver maintenance measures
1. The blade of the screwdriver must be ground correctly, and the two sides of the blade should be as parallel as possible. If the blade is tapered, the blade can easily slip out of the screw slot when turning the screwdriver.
2. Do not grind the head of the screwdriver too thin, or grind it into a shape other than Fang Tong.
3. Be careful when grinding the screwdriver on the grinding wheel, it will soften the edge of the screwdriver due to overheating. Wear goggles when grinding.
 
Jingmu (Zhongshan) Machinery Co., Ltd. (formerly Deng's Sewing Products Factory) is located in Zhongshan City, Guangdong Province, the hometown of Mr. Sun Yat-sen, the forerunner of the great democratic revolution. The company specializes in the production of sewing accessories, such as: plastic tape measure, clothes measure, tag gun (chest card gun), spray gun, industrial regulation, hexagonal needle key, screwdriver, special aluminum beer rack (rubber rack) , bundled reels (rolling reels), irons and wire machines and other types of products. After more than ten years of hard work, exploration and practice, it has formed a unique technical process and established a reliable quality assurance system.

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