What Are Different Types of Ratchet Tools?
Hand tool, a small tool that is held by a hand and controlled by human or human hands. For manual cutting and auxiliary decoration. Generally comes with a handle for easy carrying.
Hand Tools
- Chinese name
- Hand Tools
- Foreign name
- hand tool
- Features
- Generally comes with a handle for easy carrying
- Use
- Manual cutting and auxiliary decoration
- Hand tool, a small tool that is held by a hand and controlled by human or human hands. For manual cutting and auxiliary decoration. Generally comes with a handle for easy carrying.
- Hand tools are tools that transform and conquer nature, produced and developed simultaneously with humans. The first hand tools were extremely crude, such as wood sticks and angular stones.
- A hand tool that files, trims, or polishes the surface of an object by reciprocating friction. The file is composed of a toothed steel file body and a file handle. A large-size steel file (also known as a fitter file) is also equipped with a wooden handle. The outer shape of the file body is long, and its cross-section is mainly flat and round.
- Hand tool for striking or hammering objects. The hammer is composed of a hammer head and a holding handle. Hammer head: steel, copper, lead, plastic, wood, rubber, etc. Structures are solid-fixed, hammer-face replaceable, and bullet-filled. Solid fixed hammers are the most widely used. The hammering surface is replaceable. The two striking surfaces of the hammer head are detachable and replaceable, and can be replaced with hammering surfaces of various materials and hardnesses, so the striking range is large. Refilled hammer heads are equipped with steel shots or lead pellets, which can eliminate rebound when used, also known as non-rebound hammer. Elimination of rebound can significantly reduce operator fatigue. The hammering surface of one or both ends of the steel hammer head is fully heat treated and has strong rigidity; the middle section is generally not heat treated and has good elasticity and toughness. It can act as a buffer during the hammering process to prevent the hammer head. burst. There is a hole in the center of the hammer head to install the handle. Handle: There are wooden handle, steel handle and plastic handle made of fiberglass. The wooden handle is mostly made of hard wood such as walnut, locust, etc. It has good elasticity and toughness, but is easily affected by weather and has great flexibility. It is gradually replaced by hammer handles of the latter two materials.
- The use of hammers is extremely common, with many forms and specifications. Common hammers are claw hammers, claw hammers, chopper hammers and assorted hammers (Figure 1).
- A hand tool for cutting objects. The cutting part is a thin steel belt (saw blade) or a disk (saw blade) with a toothed quick opening and a thickness of about 0.2 to 0.4 mm, which are fixed on a specific frame. On one or both sides of the steel belt, there are continuous sharp serrations on the periphery of the disc, and there is an alveolar gap between the teeth, for the purpose of removing chips (chips generally have a particle shape). The saw blade or blade is installed on a hacksaw frame or saw, and the hard object can be cut into the required size and shape by reciprocating motion. The material of the saw blade and blade is carbon structural steel or high-speed steel. The saw has a wide range of applications. In addition to sawing steel and wood, it can also cut plastic, cement board, glass, etc. with a saw blade of the corresponding material. According to the cutting object, the saw blade can be generally divided into two types: full-hard (machine or hand) and flexible (hand). Except for the adjacent parts of the pin hole, the full-hard saw blade is quenched as a whole, and the hardness is uniform. It is suitable for sawing hard steel or hard and rough sections. The flexible saw blade is hardened and hardened only at the edge of the saw blade, while the back of the saw blade is flexible and elastic. When the saw blade is in a bent state, the full-hard type saw blade will break, and the rigid and flexible flexible saw blade can prevent or avoid breakage. Therefore, the flexible saw blade is suitable for cutting soft and tough objects or small cross-section objects, such as copper or tin tubular objects and hardware products. In addition, in order to enhance the abrasion resistance of the saw blade, some saw blades have also added sufficient alloy components, moderate hardness and softness, and have anti-wear, fatigue, and impact resistance during use, and can always maintain a sharp cutting Performance and good elasticity. In order to prevent the saw blade from being pinched during the sawing process, the saw teeth are generally pulled out from both sides of the saw blade at a certain angle, so that the sawing gap is wider than the thickness of the saw blade to provide clearance for sawdust. There are two types of saw teeth: cross and wave. The number of commonly used saw blade teeth (the number of teeth within each 25mm length along the tooth edge of the saw blade) are 32, 24, 18, 11, 6, and so on. When cutting materials with high hardness, a saw blade with a fine number of teeth should be used, and a saw blade with a small number of teeth is used for sawing soft materials. For example, the number of teeth of a saw blade of a logging saw is 4 teeth. Great.
- Saw blades and saw blades generally need to be equipped with a handle or a saw frame and fixed before they can be used. The most common saw frame is the hand hacksaw frame shown in Figure 4. It consists of a movable or fixed frame with a handle, a square pin and a wing nut. The wing nut is used to fasten and adjust the saw blade. The movable hacksaw frame is a retractable saw frame. It can be installed with 200, 250, 300mm length saw blades. Woodworking saws are usually operated with one hand, such as hand saws, cut saws, and crotch saws. Their saw blades are trapezoidal in shape, with wooden or plastic handles at the wide end and fixed with screws. Machine saw blades are generally installed on horizontal or vertical saws and are an indispensable tool for metal cutting. Electric chainsaws are mostly composed of chain saws or disc saws. They are driven by electric motors and have high efficiency, but they are also noisy. Safety protection devices are generally installed.
- A hand tool for tightening or loosening slot machine screws, wood screws and self-tapping screws of various sizes. Also known as screwdriver, rotary chisel, screwdriver. Its main body is a tough steel round rod (rotary rod). One end is equipped with a handle that is easy to hold, and the other end is forged into a flat or cross-shaped blade to engage the top groove of the screw and apply torque. The handle can turn the screw. The blade part of the screw rod is hardened, which has strong wear resistance. Common screwdrivers have length specifications of 75, 100, 150, and 300mm. The diameter and length of the screw rod are proportional to the thickness and width of the blade. The material of the handle is straight wood, plastic or metal. Screwdrivers are generally divided into several types, such as flat, cross, hexagon, and flower, according to the shape of the blade at the top of the screw rod. They are used to screw threaded fasteners with corresponding screw heads. Among them, the straight and cross type are the most commonly used.
- When the screw is on the abdomen of the object or the operating space is narrow, an elbow screwdriver can be used. The elbow-type screwdriver is a Z-shaped cross bar that is bent at right angles at both ends. The knife edge at one end is parallel to the cross bar and the knife edge at the other end forms a right angle with the cross bar. After using one end to turn the screw to the extreme position, turn it over the other end and continue to turn the screw until the screw is tightened or unscrewed.
- Various blade-shaped screwdrivers can be combined together to become a multipurpose screwdriver. It can be divided into 3 types in combination. The first hexagonal head of the first multi-purpose screwdriver can be inserted into various specifications of the flat, cross, hexagon and other screwdriver heads; the handle is hollow and can be installed in the above-mentioned working accessories . The second type of multi-purpose screwdriver consists of a handle with a bayonet and several specifications of the in-line and cross-type rotating rods, reaming rotating rods, steel drills, electric pens and so on. Loosen the bayonet to exchange the above working accessories. The third type of multi-purpose screwdriver can rotate automatically. The handle is equipped with a ratchet and spring. The control sleeve is equipped with positioning knobs, which can be positioned at three places. When the switch is in the same rotation position, its function is similar to ordinary The screwdriver is the same; when the switch is in the forward rotation position or the reverse rotation position, the rotation rod can be continuously rotated forward or backward. When in use, as long as the screwdriver is pressed by hand, the screw rod will quickly drive the screw to rotate. The screwdriver has a high working efficiency and is suitable for long-term operation and use, such as assembly in flow operations.
- A hand tool for assembling and unloading screw fasteners such as bolts and nuts. Wrenches are usually made of carbon structural steel or alloy structural steel. One or both ends of it are forged into a concave opening or ferrule. The size of the opening and the ferrule depends on the size of the opposite side of the screw. The wrench head has a predetermined hardness, while the middle and handle parts are elastic. When the wrench is overloaded, the handle will bend and deform before it suddenly breaks. There are 7 types of commonly used wrenches: adjustable wrench, dead wrench, plum wrench, dual-purpose wrench, socket wrench, hexagonal wrench and torque wrench.
- A hand tool for clamping, fixing and processing workpieces or twisting, bending and cutting metal wires. The shape of the pliers is V-shaped and usually includes three parts: the handle, the chin and the pliers mouth. It consists of two pliers with symmetrical structure and symmetrical shapes, which are overlapped on the chin of the pliers and fixed by riveting. The pliers can be flexibly opened and closed as the fulcrum, and its design includes the principle of leverage. The tongs were originally only used to hold objects, such as fire tongs for ironing.
- The pliers are generally made of carbon structural steel, first forged and rolled into the shape of a pliers blank, and then subjected to metal cutting processing such as milling, polishing, and finally heat treatment. The handle of the pliers is designed into three types of straight handle, curved handle and bow handle according to the holding form. The pliers are often in contact with live conductors such as wires, so the handles are generally covered with a protective tube made of insulating materials such as polyvinyl chloride to ensure the safety of the operator. There are many types of pliers nozzles. Common styles include pointed, flat, flat, round, and curved nozzles, which can meet the needs of different shapes of workpieces. According to its main function and use nature, the pliers can be divided into clamping type, shearing type and clamping shearing type. There is also a special kind of pliers-bench vise.
Hand tool clamp pliers
- It is mainly used to clamp various objects or bend them into various required shapes. Generally, the clamping surface on the inside of the pliers mouth is chiseled with horizontal, oblique, or mesh-shaped grooves in order to stably and firmly clamp the object to prevent the object from slipping or moving. Clamping pliers are generally small and slender, and can be operated with one or both hands. Clamping pliers such as curved-nose pliers, needle-nose pliers, and flat-nose pliers can flexibly clamp objects in a narrow operating space, and bend metal foils, thin wires, etc. into various required shapes; Mechanical instruments, fashion, pins, and springs are usually specialized tools used in the telecommunications industry to assemble circuit boards with dense parts. The clamp-type pliers with a jaw-shaped jaw shape do not produce prism-shaped tooth patterns on the clamping surface in the jaw. It is a tool for repairing steel reeds in the textile industry. The clamp-type pliers specially used for folding elastic retaining rings and washers are called retaining ring pliers, and there are two kinds of retaining ring pliers for holes and retaining rings for shafts. The clamp-type pliers specially designed for drawing flat or round bar-shaped workpieces are called carp pliers (Figure 2), and it can also replace a wrench to fold smaller bolts or pipes. The carp pliers has two hinged holes at the jaw to adjust the clamping fulcrum and clamping range. The clamp tongs, which are mainly used to clamp production and domestic pipes, are called pipe clamps. It consists of a movable jaw and a fixed jaw. The size of the clamping mouth can be adjusted according to the thickness of the pipe. Its working method is similar to a movable wrench. Pipe clamps have great load carrying capacity.
Hand tool pliers
- Mainly used for cutting metal wires. Wire-cutting pliers specially used for cutting large-diameter metal round bars and wires
- Shear pliers
Hand tool holding shear pliers
- The most commonly used pliers. It has both a clamping surface with a tooth pattern and a cutting edge for cutting. main
- Clamping shear pliers
Hand tool bench vise
- It is a necessary auxiliary tool for machining and fitter assembly or maintenance. It mainly consists of 4 parts: movable jaw, fixed jaw, screw rod and base. Generally installed on the bench of the fitter, it is used to clamp the workpiece, so that the fitter can perform the repair process. The lead screw acts as an elastic. Bench vise is divided into fixed and rotary type according to whether the vise body can rotate. The body of the rotary table vise can be rotated 360 ° in the horizontal direction, and can be fixed at the position required by the fitter operation. Some rotary table vices can also be rotated arbitrarily in the vertical or horizontal direction. Under normal circumstances, bench vices have a cutting board for hammering.
Hand tools diamond tools
- Ultra-hard hand tools made of natural or synthetic diamond. Diamond is the hardest substance in nature. Diamond tools are mainly used to dress worn hard tools and cut extremely hard objects. There are two main methods of manufacturing diamond tools. One is to embed natural granular diamond directly on the metal joint. Diamond tools made in this way include: diamond indenters on a hardness tester for measuring metal hardness, diamond glass cutters for cutting flat glass or lenses, and the like. The other is to arrange natural or artificial fine-grained diamonds in metal powder according to a certain rule, and use powder metallurgy to process them. Diamond tools made in this way include diamond wheel cutters, diamond cutting blades, and the like. Under normal circumstances, as long as the grinding wheel is used for a long time, grooves or grinding surface defects will occur, which will affect the quality. At this time, it needs to be re-dressed and polished with a diamond grinding wheel knife before it can be used again. Diamond wheel cutters have three angles of 60 °, 90 °, 120 °, etc., which can meet different dressing needs. Diamond cutting disc is a very thin disc with a circular hole in the middle. It is installed on a grinder or other power machine. It cuts through the high hardness and very expensive non-metallic materials and semiconductors that are difficult to cut by ordinary saws. material. In addition, there is a diamond abrasive paste for polishing the surface of clean objects. It is a liquid abrasive material made of diamond particles and lubricating oil paste. It is mainly used to polish some very hard, precision objects with high requirements on finish, such as parts on aircraft.