German AVR tools, AVR models, AVR prices

AVR tools, also known as hand tools, are distinguished from power tools. They primarily rely on manual force to turn or apply pressure. Hand tools are categorized by use into wrenches, pliers, screwdrivers, tape measures, hammers, sockets, cutting tools, scissors, tool sets, and auxiliary items such as tool carts. Each category has different models. Wrenches include open-end wrenches (fixed wrenches), double box-end wrenches, ratchet wrenches (quick wrenches), combination wrenches, pipe wrenches, T type socket wrenches, cross socket wrenches, and adjustable wrenches; pliers include wire cutters, needle-nose pliers, diagonal cutters, snap-ring pliers, slip-joint pliers, pump pliers, pipe wrenches, and locking pliers; screwdrivers include slotted, Phillips, Pozidriv, hex, and Torx types; sockets are divided into standard sockets, star sockets (E type sockets), driver sockets (BIT sockets), spark plug sockets, and impact sockets. Common specifications include 1/4", 3/8", and 1/2", where " denotes inches; each specification is further divided into 6-point sockets and 12-point sockets; hammers include claw hammers, machinist hammers, ball-peen hammers, rubber mallets, and installation hammers; cutting tools include files, diamond files, tin snips, aviation snips, utility knives, square tube saws, pipe cutters, and cable cutters. Materials include chrome-vanadium steel, carbon steel, and alloy steel.

AVR tool classification

1) Electric planer: One of the main tools used in carpentry and renovation. It is primarily used for planing flat and straight surfaces of various woods. Products are divided into short planers and rough planers. Rough planers are mainly used for planing flat wood surfaces and can process larger board surfaces; short planers are used for board surface planing and can be combined with various guides for planing tongues, edges, and grooves. The main features of handheld electric planers are small size, light weight, portability, and ease of use. Compared with manual tools, they significantly reduce labor intensity and improve processing efficiency and quality. When using a handheld electric planer, hold the handle at the rear of the planer body with your right hand and slightly raise the rear center of gravity. After starting the power with your left hand, hold the guide handle at the front of the planer, keeping the front center of gravity lower. Follow the sequence where the front of the planer contacts the wood first; once the rear center of gravity steadily contacts the planing surface, push the planer body forward smoothly in the direction of planing with both hands. After completing the planing stroke, lift the front of the planer with your left hand, then lift it with both hands and return to the starting point to continue planing until the work is complete. 2) Jigsaw: Also known as electric coping saws or electric fine saws. It is a multifunctional cutting tool that can cut wood panels, as well as perform straight or curved cuts on plastic and metal sheets. It is particularly effective for cutting complex shapes and geometric figures with small radii of curvature. It is an essential multifunctional sawing tool for home renovation and various public interior decoration projects. It features light weight, small size, portability, simple operation, and wide application range. Its cutting principle involves a narrow saw blade with upward-facing teeth that moves in a linear reciprocating motion up and down during operation to complete various cutting tasks according to size requirements. When used with a guide, it can also perform angled bevel processing. When using an electric jigsaw, fix smaller and thinner wooden boards to a workbench and support the workpiece with your left hand, then hold the saw handle with your right hand and push forward slowly. Apply steady and uniform force; do not exert excessive force to avoid injury or damaging the blade. For larger boards, ensure the board is securely fixed, then hold the saw handle with both hands and push forward. Follow the cutting line and always keep the blade perpendicular to the board surface to prevent jamming or binding. 3) Circular saw: Also known as a small handheld circular saw. It is a new type of small handheld electric saw equipped with a spring-loaded automatic safety guard and an electronically controlled constant-speed motor. It features simple operation, flexibility, quick adjustment, and safety reliability, making it very suitable for home renovation tasks such as cutting various wood panels and fiberboards. The thickness of wood or boards being cut should generally be below 60mm. 4) Sanding tools: Also known as small handheld grinders. Primarily used for sanding bare wood before painting various wood finishes, and also for sanding putty surfaces. However, sanding putty generates significant dust, which seriously pollutes the environment, so enhanced labor protection is required during operation. Handheld grinders include belt sanders and orbital sanders. Belt sanders are mainly used for rapid sanding of wooden components and products, while orbital sanders are commonly used for sanding larger areas such as wooden floors in home renovations. 5) Small engraving machine: Also known as a groove planner or trimmer. It can be used for grooving, tenoning, drilling, edging, milling, and trimming on various wood products and components. It can also perform simple edging, milling, grooving, and trimming on light metal materials such as aluminum alloy and plastic steel, such as aluminum alloy (or plastic steel) doors and windows, balcony frames, and furniture frames. Therefore, it is also one of the commonly used power tools in modern home renovation projects.

AVR tool classification

Internationally, explosion-proof tools are collectively referred to as "safety tools" and "non-sparking tools," while in China they are collectively known as "explosion-proof tools." Explosion-proof tools produced, sold, and distributed in China can be divided into two main categories based on material: 1. Aluminum-copper alloy (commonly known as aluminum bronze) explosion-proof tools, with specific materials consisting of high-purity electrolytic copper as the base, added with appropriate amounts of aluminum, nickel, manganese, iron, and other metals to form a copper-based alloy. 2. Beryllium-copper alloy (commonly known as beryllium bronze) explosion-proof tools, with specific materials consisting of high-purity electrolytic copper as the base, added with appropriate amounts of beryllium, nickel, and other metals to form a copper-based alloy. Both materials have excellent thermal and electrical conductivity. After heat treatment, the hardness and wear resistance of aluminum bronze are nearly identical to those of beryllium bronze, both reaching above HRC30o. Beryllium bronze is non-magnetic and can be used in strong magnetic field environments. Explosion-proof tools can also be divided into two main categories based on manufacturing process: 1. Casting process: This is a traditional manufacturing process that was internationally standardized for producing explosion-proof tools in the 80s and has been continuously used by most domestic explosion-proof tool manufacturers until today. Advantages of the casting process include simplicity and low manufacturing costs. Disadvantages include lower product density, hardness, tensile strength, and torque, as well as more porosity and sand holes, resulting in shorter product lifespan. 2. Forging process: This is the latest international manufacturing process, utilizing large presses or punch machines along with high-heat-resistant forming molds to forge products in one step. Advantages of the forging process include significantly improved product density, hardness, tensile strength, and torque, virtually eliminating porosity and sand holes, thereby extending the mechanical performance and lifespan of the product by approximately 1 times compared to traditional casting processes. Disadvantages include higher investment in equipment and molds, leading to higher costs.

AVR tool usage

1) Before use, carefully inspect the tool. Ensure there is no external damage, the switch operates flexibly without sticking, and the power cord and housing of the power tool are intact. Use a 500V megohmmeter to measure the insulation resistance between the winding and the housing; the value must not be less than O.5 megohms. See the attached table for insulation resistance values. 2) Handheld power tools with metal housings must have a reliable protective grounding wire. The power cord should be a multi-core soft rubber-sheathed cable, and the grounding protection wire at both ends must be securely connected. 3) Handheld power tools should be used by dedicated personnel with appropriate professional knowledge. Strictly adhere to relevant safety operating procedures during use. 4) Before use, check whether the relevant electrical and mechanical protection devices are intact and functioning normally. Also ensure that rotating parts move flexibly without sticking. 5) When using Class I handheld power tools, users must wear prescribed protective equipment and set up qualified protective gear. Take corresponding anti-electric shock safety measures as required, such as installing residual current devices (RCDs) in the power circuit, or having the user wear insulating gloves, insulating shoes, or stand on an insulating mat. When using Class II handheld power tools in damp and confined spaces, install a leakage switch with a working current of less than 1.5mA and an action time of less than or equal to 0.1 seconds. The leakage switch should be placed inside the container and monitored by a dedicated person. 6) Occupational hazards of using handheld power tools. Arm vibration disease caused by long-term exposure to hand-transmitted vibration was listed as one of China's statutory occupational diseases as early as 1957, also known as local vibration disease, typically manifested as episodic white finger.

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