German ERDI tools ERDI models ERDI prices

ERDI tools is a general term for various metal devices manufactured through physical processing such as forging, rolling, and cutting of metals like iron, steel, and aluminum. Hardware tools can be classified by product application into: tool hardware, construction hardware, daily-use hardware, locks and abrasives, kitchen and bathroom hardware, home hardware, and hardware components. This includes various manual, electric, pneumatic, and cutting tools; automotive maintenance tools; agricultural tools; lifting tools; measuring tools; tool machinery; cutting tools; jigs and fixtures; cutters; molds; cutting edges; grinding wheels; drill bits; polishing machines; tool accessories; measuring tools and cutting edges; painting tools; abrasives and grinding materials; manual socket wrench sockets; striking open-end wrenches; and striking box-end wrenches.

ERDI tool types

1) Frame saw. Also known as a buck saw, it consists of an I-shaped wooden frame, twisted rope and twist pieces, and a saw blade. Both ends of the saw blade are fixed to the frame with knobs, which can also be used to adjust the angle of the blade. 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 sawing thicker wood. Medium saw blades are 550—650mm long, with a tooth pitch of 3—4mm; medium saws are mainly used for sawing 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 sawing finer wood and cutting tenon shoulders. 2) Knife saw. A knife saw mainly consists of a saw edge and a handle, and can be classified into single-sided, double-sided, and backed knife saws. Single-sided knife saws have a blade length of 350mm, with teeth on one side; depending on the function of the teeth, they can be divided into rip-cut and cross-cut types. Double-sided knife saws have a blade length of 300mm, with teeth on both sides; typically, one side is for rip-cutting and the other for cross-cutting. Backed knife saws have a blade plate length of 250—300mm; the back of the backed knife saw is reinforced with a steel strip, featuring finer teeth, and is available in rip-cut and cross-cut versions. 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, with the blade being approximately 250—750mm long and a tooth pitch of 3—4mm. Panel saws are mainly used for sawing wider wooden boards. 5) Narrow hand saw. The blade is narrow and long, with a pointed tip, and a length of approximately 300—400mm. Narrow hand saws are mainly used for sawing narrow holes and slots. 6) Keyhole saw. Also known as a compass saw, it has a similar structure to a frame saw, but the blade is narrower (approximately 10mm), and is mainly used for sawing 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 steel wire between the two ends. Saw-tooth-like ridges are cut into the steel wire, using the sharp edges of these ridges for sawing. The steel wire is approximately 200—600mm long, and the saw bow is 800—900mm long. Wire saws are mainly used for sawing complex curves and cutting holes.

ERDI tool structural composition

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

ERDI tool usage

1) Before use, carefully inspect the tool to ensure there is no external damage, the switch operates flexibly without sticking, and the power cord and housing of the electric 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 electric 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 electric tools should be operated by dedicated personnel with appropriate professional knowledge. Strictly adhere to relevant safety operating procedures during use. 4) Before use, check that all related electrical and mechanical protective devices are intact and functioning normally. Also ensure that rotating parts move flexibly without sticking. 5) When using Class I handheld electric tools, operators must wear prescribed protective equipment and use 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 operator wear insulating gloves, insulating shoes, or stand on an insulating mat. When using Class II handheld electric tools in damp and confined spaces, install a residual current circuit breaker (RCCB) with an operating current of less than 1.5mA and an operating time of less than or equal to 0.1 seconds. The RCCB should be placed inside the container and monitored by dedicated personnel. 6) Occupational hazards associated with the use of handheld electric 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, with typical manifestations including episodic white finger.

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