1. The use of cutting tools, should keep sharp grinding, intact, the installation is correct, solid and reliable. 2. The use of grinding wheel equipment, the speed is generally above 10000r / min, therefore, the quality of the wheel and the installation of strict requirements. Before use should check the wheel and the disk asked the pad and install a solid, nut not too tight, where damp, deformation, cracks, broken, knock on the gap or contact with oil, alkali grinding wheel shall not be used, and shall not damp Grinding wheel self-drying use. 3. Hand-held power tools with high speed, vibration, direct contact with the human body during operation, so in wet areas or in metal structures, pressure vessels, pipes and other well-ventilated place to work, you must use double insulation or reinforced insulation power tools. 4. The use of engineering plastics for the case of non-metallic shell motor, electrical appliances, storage and use should be to prevent the pressure, damp, and shall not touch gasoline and other solvents. 5 pre-job inspection should meet the following requirements: To ensure the normal use of hand-held power tools, hand-held power tools must be checked in accordance with the following requirements: (1) shell, the handle does not appear cracks, damage; (2) Cable cords and plugs are intact, the switch is in normal operation, the connection between the protection and the zero connection is solid and reliable; (3) All parts of the protective cover complete solid, reliable electrical protection device. 6. After starting the machine should be no-load operation. Should check and confirm the machine linkage flexible. Work, the force should be smooth, not too hard. 7. Do not overload the use of. To prevent the failure to achieve the purpose of prolonging the service life, work should pay attention to sound and temperature, abnormalities should be immediately shut down for inspection. Asked a long time in the operation, the temperature rise of more than 60 ℃, it should be shut down, and then natural cooling operation. 8 operations, should not touch the cutting tools, molds and grinding wheel, found it blunt, damaged conditions, should immediately stop trimming or replacement, and then continue to operate. 9. Hand-held power tools rely on the operator's hand to control, if in the process of running his hands, the machine out of control, will destroy the workpiece, damage to equipment, or even cause harm to the human body. Therefore, when the machine is turning, it is impossible to let it go. 10. The use of impact drill or hammer should meet the following requirements: (1) When operating, you should master the electric drill or hammer handle. When punching, first put the drill bit against the working surface, and then start it. Use moderate force to avoid shaking. If the speed drops sharply, you should reduce the force to prevent the motor from overload. Pressurized (2) When drilling, should pay attention to avoid the steel in concrete; (3) 40% of the electric drill and hammer intermittent work system, not for a long time continuous use; (4) working aperture above 25mm, there should be a stable platform, surrounded by fence.
