Comprehensive information on hand tools

The so-called hand tools are also called hand tools, which are relative to power tools. Mainly with the help of hands to twist or apply force on the tool. Basic introduction Chinese name: Hand Tools Classification: Wrenches, Pliers, Screwdrivers Full name: Hand tools Definition: Using hands to twist or apply force to the tool structure, classification, screwdriver, wrench, hammer, test pen, tape measure, wallpaper Knife, electrician's knife, hacksaw, level, wire cutters, needle nose pliers, wire strippers, operating tools, precision hand tools, wrenches, squares, screwdrivers, C-clamps, pliers, carpentry knives, safety matters, hazards, Precautions, purchase methods, structure. According to their uses, hand tools can be divided into wrenches, pliers, screwdrivers, tape measures, hammers, sockets, cutting types, scissors, sets, and auxiliary categories such as tool carts. etc. Each category has different models. Wrenches include open-end wrenches (machine hand), double torx wrenches, ratchet wrenches (quick wrenches), dual-purpose wrenches (compound wrenches), tubing wrenches, T-type socket wrenches, cross socket wrenches, adjustable wrenches, etc.; pliers include steel wire Pliers, needle nose pliers, diagonal nose pliers, retaining ring pliers, carp pliers, water pump pliers, pipe pliers, powerful pliers and other categories; Screwdrivers are of one-shaped, cross, rice-shaped, hexagonal, flower-shaped and other categories; Sockets are divided into ordinary types Sockets, flower-shaped sockets (E-type sockets), screwdriver sockets (BIT sockets), spark plug sockets, powerful sockets, etc. According to the specifications, there are three common specifications: 1/4", 3/8" and 1/2", "" is expressed in inches; at the same time, each specification has a 6-angle socket and a 12-angle socket; hammers include claw hammers , fitter hammers, ball-peen hammers, rubber hammers and installation hammers; cutting categories include files, diamond files, tin shears, aviation shears, utility knives, square pipe saws, pipe cutters, bolt cutters and other categories; in terms of materials , including Luoyang vanadium steel, carbon steel, alloy steel, etc. Classification Screwdriver A tool used to turn a screw to force it into place, usually with a thin wedge-shaped head that can be inserted into a slot or notch in the screw head - also known as a "screwdriver". Wrench is a hand tool that uses the principle of leverage to twist bolts, screws, nuts and other threaded fastening openings or hole fasteners of bolts or nuts. Wrenches are usually equipped with a clamp handle at one or both ends of the handle. By applying external force to the handle, the bolt or nut can be twisted to hold the opening or hole of the bolt or nut. When in use, external force is applied to the handle along the direction of thread rotation to twist the bolt or nut. A hammer is a tool used to strike objects to cause them to move or deform. It is most commonly used to hammer nails, straighten or break objects apart. Hammers come in various forms, the common ones being a handle and a top. One side of the top is flat for striking, and the other side is the hammer head. The hammer head can be shaped like a goat's horn or wedge-shaped, and its function is to pull out nails. There is also a round-headed hammer head. Test pen is also called test pen, or "electric pen" for short. It is an electrician's tool used to test whether electrical wires are live. There is a neon bulb in the pen body. If the neon bulb glows during the test, it means that the wire has electricity or is a live wire in the path. The pen tip and tail of the test pen are made of metal materials, and the pen barrel is made of insulating materials. When using a test pen, be sure to touch the metal part at the end of the test pen with your hand. Otherwise, because there is no circuit between the charged object, the test pen, the human body, and the earth, the neon bulb in the test pen will not emit light, causing misjudgment. No electricity. Tape measure Tape measure is a commonly used measuring tool in daily life. What everyone often sees is the steel tape measure, which is commonly used in construction and decoration, and is also one of the essential tools for the home. Divided into fiber tape measure, tape measure, waist measurement, etc. Luban ruler, Feng shui ruler and Wen meter ruler are also steel tape measures. Wallpaper Knife: A type of knife with a sharp blade, used to cut wallpaper and the like, hence the name "Wallpaper Knife", also known as "Utility Knife". It is often used in decoration, decoration and advertising plaque industries. Electrician's knife An electrician's knife is a cutting tool commonly used by electricians. An ordinary electrician's knife consists of a blade, a blade, a handle, a knife hanger, etc. When not in use, retract the blade into the handle.

The root of the blade is hinged with the handle, and has scale lines and scale marks on it. A screwdriver bit is formed at the front end, and a file surface area is processed on both sides. There is a concave curved edge on the blade, and the end of the curved blade forms a blade tip. The handle is equipped with a protective button to prevent the blade from springing back. The blade of the electrician's knife has multiple functions. When used, only one electrician's knife can be used to complete various operations of connecting wires. There is no need to carry other tools. It has the beneficial effects of simple structure, easy use, and diverse functions. Hacksaws include hand saws (household use, woodworking), cut saws (branch pruning), folding saws (branch pruning), hand bow saws, edge saws (woodworking), slitting saws (carpentry), cross-cut saws ( Woodworking) Level The level has a level bubble and can be used for inspection, measurement, and debugging whether the equipment is installed level. Wire cutters are a type of clamping and cutting tool, consisting of a pliers head and a pliers handle. The pliers head includes a jaw, a tooth mouth, a knife edge, and a guillotine. The functions of each part of the pliers are: ① The tooth mouth can be used to tighten or loosen nuts; ② The knife edge can be used to cut the rubber or plastic insulation layer of flexible wires, and can also be used to cut off wires and iron wires; ③ The guillotine mouth can be used to Cut off hard metal wires such as wires and steel wires; ④ The insulated plastic tube of the pliers can withstand a voltage of more than 500V, and it can cut wires while powered. Needle-nose pliers, also called trimming pliers, are mainly used to cut single-stranded and multi-stranded wires with smaller diameters, bend single-stranded needle-nose pliers wire connectors, strip plastic insulation layers, etc. They are also used by electricians (especially One of the tools commonly used by inside line electricians). It consists of a tip, a knife edge and a pliers handle. The handles of electricians' needle-nose pliers are covered with insulating sleeves with a rated voltage of 500V. Because the head of needle-nose pliers is sharp, it can only be used in small spaces. The method of using needle-nose pliers to bend wire connectors is: first bend the wire end to the left, and then bend it to the right in a clockwise direction close to the screw. Wire stripper Wire stripper is one of the tools commonly used by internal electricians, motor repairers, and instrumentation electricians. Its appearance is as shown below. It consists of a knife edge, a crimping port and a plier handle. The handle of the wire stripper is covered with an insulating sleeve with a rated working voltage of 500V. Wire stripping pliers are suitable for stripping plastic and rubber insulated wires and cable core wires. The method of use is: place the wire to be stripped in the cutting edge of the pliers, pinch the two pliers handles with your hands, and then loosen them, the insulation will be separated from the core wire. Operating Tools Precision Hand Tools 1. Choose an appropriate saw blade to match the work object, for example, 14 teeth per inch for sawing solid 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 metal plates, metal pipes and thin iron bars. 2. Push the saw forward and then lift it up gently when pulling it back. Wrench 1. A wrench of appropriate size should be selected according to the nature of the work. 2. When using an adjustable wrench, force should be applied toward the fixed side and never toward the movable side. 3. If the opening of the wrench is worn or slips during use, do not continue to use it to avoid slipping. 4. Do not use a wrench as a hammer to strike. 5. Do not put a tube on the handle end of the wrench to increase the torque of the wrench. Long Square: Press the inside of the first side of the square, lean against the edge of the board, and draw the pencil along the inside of the second side of the square to draw a vertical line. Screwdriver 1. Choose an appropriate screwdriver that matches the size and shape of the screw head groove. 2. Do not hit the screwdriver handle with a hammer. If the handle is damaged, replace it immediately. 3. Do not use the screwdriver as a chisel or lever. 4. Use an electrician's screwdriver to test the current. Do not use a general screwdriver to test high-voltage electricity. 5. The cutting edge of the screwdriver cannot be ground to avoid damaging the hardened surface. 6. Do not put the screwdriver in the pocket of clothes or pants to avoid injury when colliding or falling. C-type clamp C-type clamp is used to fix the work object. When clamping the object, the rotating shaft rocker is facing downward. Generally, a 3-inch clamp or a 4-inch clamp (referring to the maximum thickness that can be clamped) is sufficient, depending on the number of clamps. Pliers 1. Pliers are only used for fastening, inserting and removing various pins and nails, and cutting or twisting various wires. 2. Pliers cannot be used to tighten or knock bolts or nuts. 3. Do not tap the handle of the pliers or lengthen the handle to increase the clamping or cutting force. Carpenter's Knife Carpenter's knife is generally used for trimming detailed irregular parts. The blade is a single piece and is less likely to break.

Safety Matters Hazards Hazards that can be caused by general hand tools include: 1. Cuts by sharp parts. 2. Being stabbed by a sharp part. 3. Caught by tools. 4. Injury to the hand while hammering. 5. Injured by flying debris generated during work. 6. Affected by the noise generated during work. 7. Inhalation of dust generated during work. Notes: 1. Before use, hand tools must be checked for damage. Unsafe tools should not be used. 2. Keep the tools clean, especially the hand grips of the tools, to prevent them from slipping and falling out during work. 3. Wear appropriate personal protective equipment such as goggles, gloves, etc. 4. Use hand tools with correct posture and techniques. When using, the posture should be so that the force is stable and stable. Do not use excessive force. 5. When using sharp tools, never point the blade or sharp part towards others. 6. When not in use, the blade or sharp part of the tool should be wrapped with a protective material for protection. Avoid carrying the tool with your hands or putting it in your pocket. 7. Hand tools should not be misused for other purposes. 8. Understand the characteristics of various hand tools and use them correctly. How to purchase: There are many international and domestic hand tool brands. The more famous foreign brands include Kenipex, German K brand (the pliers are better), American STANLEY, Snap-on, etc. Domestic brands include Wenden Maibo, Shanghai World Brands such as Da, Jiashan Jinyi, Ningbo Jiejie (sleeves, sets and tool carts are better), Yuyao Great Wall (tape measure is better). Types and Selection of Hand Tools Choosing appropriate hand tools is very important. Factors to consider include: 1. The needs of the process. 2. Nature of work. 3. The material of the tool. 4. The shape, size, weight, etc. of the tool itself.