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Talking about the Electric Power Tools

A Brief History of Electric Tools

1895, Germany made the world's first DC electric drill, Shell made of cast iron, can drill on the steel plate 4mm hole, then appeared three-phase power frequency (50HZ) electric drill, but the motor speed failed to break through 3000r/min.

In 1914, a single-phase series of motor driven electric tools, motor speed up to 10000r/min above.

1927, the power supply frequency is 150~200hz medium-frequency electric tool, it not only has the advantages of high rotational speed of single-phase series motor, but also has the advantages of simple structure and reliability of three-phase power-frequency motor, but the use of intermediate frequency current is limited.

 

Introduction of Several Electric Tools

1. Electric Drill: A tool specially designed to drill holes in various materials, such as metals, plastics, and wood.

2. Impact Drill: A tool specially designed to drill holes in concrete, masonry, and similar materials with an electric drill similar in shape, but with an internal impact mechanism in order to produce an axial impact motion of the rotary output spindle.

3. Electric Hammer: The impact mechanism with internal loading is not affected by the operator, but at the same time, the rotary motion Hammer tool is added.

4. Hammer Drill: With an internal impact mechanism, the impact of the rotary operation of the hammer tools, can be achieved through the adjustment mechanism only rotation or impact of the operation.

 

How to Choose Electric Tools?

The use of hand-held electric power tools used in the environment is harsh, to keep moving, large vibration, high noise; power cord is susceptible to drag, friction or mechanical extrusion and damage, so that the insulation strength is damaged, causing personal shock casualties, in order to prevent accidents, should be correctly selected hand-held power tools.

1. Select qualified products with "3C" certification.

2. General occasions should be selected  products, such equipment with dual insulation, the use of relatively safe.

3. In the humid place or metal frame, such as conductive performance good place to work, should choose  class or  products.

4. In the metal containers, pipelines, boilers and other narrow places work, should choose  category products.

5. If the use of Class I products, the safety requirements should be taken as necessary other safety measures, such as the installation of leakage protector, safety isolation transformers.

 

Personal Protection When Using an Electric Hammer

1. The operator should wear protective glasses to protect his eyes, and when facing up to work, wear protective masks.

2. Long-term operation of the Fort good ear plugs to reduce the impact of noise.

3. Long-term operation after the bit in the hot state, in the replacement should pay attention to burn the skin.

4. The operation should use the side handle, hands operation, to prevent the plug and turn when the reaction sprain arm.

5. Standing on the ladder work or high place should do a good job fall measures, the ladder should be ground personnel support.

 

Application Advantage of Electric Hammer

1. Good damping system: can make the operator hold comfortable, alleviate fatigue.

2. Accurate speed switch: light touch switch when the speed is low, can help the machine to start drilling smoothly (for example, on the smooth surface of ceramic tiles, such as drilling, not only to prevent the drill bit slippery, but also to prevent the hole rupture.)

3. Stable and reliable safety clutch: Also known as torque limit clutch, to avoid the use of the process due to the bit of the card lag caused by the large torque reaction to the user, this is a security for users.

4. Comprehensive electrical Protection device: In the use of the inevitable particles of hard things into the machine (especially for the machine upward drilling, such as the wall top drilling), if the motor does not have a certain protection, in high-speed rotation is very easy to be hard to break or scratch the enameled wire, resulting in motor failure.

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