German WEMA WERKZEUG tools, WEMA WERKZEUG models, WEMA WERKZEUG prices

WEMA WERKZEUG 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 accessories such as tool carts, with each category having 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 pliers, snap-ring pliers, slip-joint pliers, water pump pliers, pipe wrenches, and locking pliers; screwdrivers include slotted, Phillips, Pozidriv, hex, and Torx types; sockets are divided into standard sockets, Torx sockets (E type sockets), bit sockets (BIT sockets), spark plug sockets, and impact sockets. Common drive sizes are 1/4", 3/8", and 1/2", where " denotes inches; each size 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 bolt cutters. Materials include chrome-vanadium steel, carbon steel, and alloy steel.

WEMA WERKZEUG tool types

1) Frame saw. Also known as a buck saw, it consists of an H-shaped wooden frame, twisted rope, twist sticks, and a saw blade. The ends of the saw blade are fixed to the frame with knobs, which can be used to adjust the blade angle. After tightening the twisted rope, the blade is taut and ready for use. Frame saws are classified into coarse, medium, and fine types based on blade length and tooth pitch. Coarse saw blades are 650–750mm long, with a tooth pitch of 4–5mm; coarse saws are mainly used for cutting thicker wood. Medium saw blades are 550–650mm long, with a tooth pitch of 3–4mm; medium saws are mainly used for cutting thin wood or cutting tenons. Fine saw blades are 450–500mm long, with a tooth pitch of 2–3mm; fine saws are mainly used for cutting finer wood and cutting tenon shoulders. 2) Knife saw. A knife saw mainly consists of a saw edge and a handle, and can be single-sided, double-sided, or back-backed. Single-sided knife saws are 350mm long, with teeth on one side; depending on the function of the teeth, they can be rip-cut or cross-cut. Double-sided knife saws are 300mm long, with teeth on both sides; typically, one side is for rip-cutting and the other for cross-cutting. Back-backed knife saw blades are 250–300mm long; the back is reinforced with a steel strip, the teeth are finer, and they are available as rip-cut or cross-cut saws. 3) Groove saw. A groove saw consists of a handle and a saw blade, with the blade being approximately 200mm long. Groove saws are mainly used for cutting grooves in wood. 4) Panel saw. Also known as a hand saw, it consists of a handle and a saw blade. The blade is approximately 250–750mm long, with a tooth pitch of 3–4mm. Panel saws are mainly used for cutting wider boards. 5) Keyhole saw. The blade is narrow and long, with a pointed tip, and is approximately 300–400mm long. Keyhole saws are mainly used for cutting small holes and slots. 6) Coping saw. Also known as a fret saw, its construction is similar to that of a frame saw, but the blade is narrower (approximately 10mm), and it is mainly used for cutting arcs and curves. 7) Wire saw. Also known as a bow saw, it is made by bending a bamboo strip into a bow shape and stretching a wire between the ends. The wire has serrated edges formed by filing, which use sharp ridges for cutting. The wire is approximately 200–600mm long, and the bow frame is 800–900mm long. Wire saws are mainly used for cutting complex curves and openings.

WEMA WERKZEUG tool structure and composition

The cross-sectional shape and distribution of the magnetic poles vary depending on the workpiece. Common structures of electromagnetic chucks include rectangular and circular types. Rectangular magnetic poles are arranged either longitudinally or transversely. Longitudinal arrangement of rectangular magnetic poles is suitable for clamping larger workpieces; transverse arrangement is suitable for clamping smaller workpieces. Circular chucks are suitable for clamping ring-shaped workpieces or workpieces with complex shapes. The main characteristics of standard electromagnetic chucks are: magnetic flux lines are evenly distributed on the surface of the chuck, magnetic attraction cannot be concentrated, and the magnetic force per unit area is relatively small; the direction of magnetic force is perpendicular to the chuck surface and difficult to change, producing only one type of magnetic force for workpieces with the same contact area; the point of action of the magnetic force is limited to the contact surface between the workpiece and the chuck and cannot be arbitrarily changed. Therefore, disadvantages during machining include low positioning accuracy, insufficient clamping force, narrow scope of application, and low production efficiency.

WEMA WERKZEUG tool usage

1) When placing the diamond dressing tool tip into the holder, take care not to impact the grinding wheel surface. 2) Do not align a single-point diamond dressing tool tip vertically with the center of the grinding wheel; generally, it should be inclined by 10-15°. 3) Do not "quench" (i.e., suddenly cool) a heated dressing tool. During dry dressing, maintain sufficient interval time between dressing operations to allow the heated dressing tool to cool. 4) Do not assume the grinding wheel surface is ideally flat. At the start of dressing, locate the point position on the grinding wheel and perform dressing. 5) If possible, the stock removal per dressing operation must not exceed 0.001 inches on the grinding wheel radius. Excessive stock removal can cause premature wear and frequent fracture of the diamond dressing tool tip. 6) However, do not remove too small an allowance each time. Grinding wheels used on old or poorly rigid machine tools may not require dressing. 7) Note that during dressing, do not dwell at one position for too long. This will polish the grinding wheel surface, generate high temperatures, and damage the diamond dressing tool. Rotate the dressing tool at least once daily. 8) Do not continue to use worn or damaged dressing tools. Adjust or replace them promptly. 9) Do not select excessive stock removal and too fast a transverse feed rate during rough dressing, and then select small stock removal and slow transverse feed rate during finish dressing. This will rapidly damage the diamond dressing tool. If possible, it is recommended to select the same transverse feed rate for both rough and finish dressing.

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