German DUMONT tools DUMONT models DUMONT prices

DUMONT tools powered by electric motors or electromagnets, driving the working head through a transmission mechanism, are referred to as power tools. These are hand-held tools that use low-power electric motors or electromagnets as the power source, driving the working head via a transmission mechanism. Power tools are divided into handheld and portable types; handheld power tools are more flexible, convenient, and widely used. Many varieties have become essential tools for production and daily life. There are numerous power tool brands. Based on function and application, they are mainly classified into metal cutting power tools, grinding power tools, assembly power tools, and railway power tools. Common power tools include electric drills, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers.

DUMONT tool types

1) Frame saw. Also known as a buck saw, it consists of an H-shaped wooden frame, twisted rope and twisting pieces, and a saw blade. The two 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 the rope is tightened, 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 lumber. Medium saw blades are 550—650mm long, with a tooth pitch of 3—4mm; medium saws are mainly used for sawing thin lumber 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 back-backed knife saws. Single-sided knife saws are 350mm long, with teeth on one side; depending on the function of the teeth, they can be divided into rip saws and crosscut saws. Double-sided knife saws are 300mm long, with teeth on both sides; typically, one side is a rip saw and the other is a crosscut saw. Back-backed knife saw plates are 250—300mm long; the back of the saw is reinforced with a steel strip, and the teeth are finer, available as rip or crosscut 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 sawing wider boards. 5) Keyhole saw. The blade is narrow and long, with a pointed tip, and is approximately 300—400mm in length. Keyhole saws are mainly used for sawing narrow 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), 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, with wire stretched between the two ends. Saw-tooth-like projections are cut into the wire, using the sharp edges of these projections for sawing. The 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.

DUMONT tool structure and composition

The function of the power component is to convert the mechanical energy of the prime mover into hydraulic pressure energy. This refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. The structural forms of hydraulic pumps generally include gear pumps, vane pumps, and piston pumps. The function of actuating components (such as hydraulic cylinders and hydraulic motors) is to convert the pressure energy of the liquid into mechanical energy, driving the load to perform linear reciprocating motion or rotary motion. Control components (i.e., various hydraulic valves) control and regulate the pressure, flow, and direction of the liquid in the hydraulic system. Depending on the control function, hydraulic valves can be divided into pressure control valves, flow control valves, and directional control valves. Pressure control valves are further divided into relief valves (safety valves), reducing valves, sequence valves, pressure relays, etc.; flow control valves include throttle valves, adjustment valves, flow divider-combiner valves, etc.; directional control valves include check valves, pilot-operated check valves, shuttle valves, directional valves, etc. Depending on the control method, hydraulic valves can be divided into on/off control valves, fixed-value control valves, and proportional control valves. Auxiliary components include oil tanks, oil filters, oil pipes and pipe fittings, sealing rings, pressure gauges, oil level and oil temperature gauges, etc. Hydraulic oil is the working medium that transfers energy in the hydraulic system, including various mineral oils, emulsions, and synthetic hydraulic oils.

DUMONT tool features

The electronically controlled powerful chuck has extremely strong holding force, up to 16kg/cm², with uniform and adjustable magnetic distribution, suitable for various heavy machining, rough machining, and finish machining operations. Ordinary powerful chucks have weaker and uneven holding force, unable to meet the requirements of heavy machining operations. The holding force of an electronically controlled powerful chuck does not require a continuous power supply to maintain, generating no heat during continuous operation, thereby avoiding thermal deformation of the workpiece. Meanwhile, the strong and uniform surface suction ensures the highest machining precision even if the workpiece extends beyond the table surface. In contrast, ordinary electromagnetic chucks require a continuous current supply, generating heat after a period of operation, which not only causes thermal deformation of the workpiece but also reduces the magnetic force of the chuck, failing to guarantee machining precision. Electronically controlled powerful chucks can be used continuously; even if operated continuously for more than 20 hours per day, no faults will occur, and no maintenance is required. Ordinary permanent magnet chucks may experience a decline in suction force after about half a year of use, while electromagnetic chucks can only operate for a few hours per day, and the equipment is prone to failures, requiring frequent replacement and repair of internal components. Using ordinary powerful chucks requires significant workpiece adjustment time, accounting for 40%-50% of the entire machining process, and clamping positioning is prone to obvious errors, resulting in high scrap rates and very low efficiency. Electronically controlled powerful chucks feature automatic auxiliary positioning; simply pressing a button completes workpiece clamping or release in 0.3 seconds, significantly improving production efficiency.

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