Generally speaking, Class II handheld electric screwdrivers should be used in ordinary places, and leakage protectors with a rated electric shock action current of no more than 15mA and a rated action time of less than 0.1s should be installed. If a Class I handheld electric screwdriver is used, it must also be grounded. Operators wear insulated gloves, insulated shoes, or stand on insulated pads to work.

2. If the working environment is humid, only Class II handheld electric screwdrivers can be used, and splash proof leakage protectors should be installed. Prohibit the use of Class I handheld electric screwdrivers.

3. If the working environment is narrow, it is advisable to use a Class III handheld electric screwdriver with an isolation transformer. Similarly, if a Class II handheld electric screwdriver is used, in addition to following the second principle, the isolation transformer or leakage protector should also be installed. People must be under supervision during work.

4. The load line of the handheld electric screwdriver must be made of weather resistant rubber sheathed copper core flexible cable, and there must be no joints. The use of plastic threads is prohibited.

5. The tools used for cutting should be kept sharp, intact, installed correctly, and firmly and reliably.

6. When using a grinding wheel, the soft pad between the grinding wheel and the connecting plate should be checked for stability, and the nut should not be too tight. Any grinding wheel that is damp, deformed, cracked, broken, chipped, or has come into contact with oil or alkali should not be used, and the damp grinding wheel should not be dried and used on its own.

7. When working in damp working environments or within metal structures, it is necessary to use electric screwdrivers with double insulation or reinforced insulation.

8. Electric motors and appliances with non-metallic shells should not be subjected to pressure or moisture during storage and use, and should not come into contact with solvents such as gasoline.

9. The inspection before homework should meet the following requirements: a. The shell and handle should not have cracks or damage; Damage; b. The cable and plug are intact and undamaged, the switch operates normally, and the protective neutral connection is correct, firm, and reliable; c. All protective covers are complete and firm, and the electrical protection devices are reliable.

10. After starting the machine, it should run without load, and the linkage of the machine should be checked and confirmed to be flexible and unobstructed. When doing homework, the force should be applied steadily and not too forcefully.

11. Non compliant operations are strictly prohibited. Pay attention to the sound and temperature rise of the equipment during operation, and stop the machine for inspection in a timely manner if any abnormalities are found. Generally speaking, if the temperature rises above 60 degrees, the machine should be shut down and checked after cooling down.

12. During operation, do not touch the cutting tools, molds, and grinding wheels with your hands. If any dullness or damage is found, stop the machine immediately for repair or replacement to avoid accidents.

When using an impact type electric screwdriver or drill, the following requirements should be met: a. During operation, the handle of the electric screwdriver or drill should be held by hand. When drilling, the drill bit or screwdriver head should be pressed against the working surface first, and then driven with moderate force to avoid shaking; If the speed drops sharply, the force should be reduced to prevent motor overload. It is strictly prohibited to use wooden bars to apply pressure. When screwing, attention should be paid to avoiding the steel bars in the concrete; c. Electric drills or impact electric screwdrivers have a 40% intermittent working system and cannot be used continuously for a long time; d. When the torque of the homework is too large and the screw or hole diameter is more than 25mm, a stable work platform should be provided, and guardrails should be set up around it.

13. When using a porcelain cutting machine, the following requirements should be met: a. During operation, debris and mud dust should be prevented from mixing into the motor, and the temperature of the casing should be observed at all times. When the casing temperature is too high and sparks from carbon brushes are generated, the machine should be immediately stopped for inspection and handling; b. During the cutting process, the force should be evenly and appropriately applied, and the blade should not be pushed too hard. When the blade gets stuck, the machine should be stopped immediately and the blade should be slowly removed. It should be re aligned before cutting again.

14. When using an angle grinder, the following requirements should be met: a. The grinding wheel should be of reinforced fiber resin type, and its safe linear speed should not be less than 80m/s. The cables and plugs used should have reinforced insulation performance and cannot be replaced arbitrarily; b. During grinding operations, the grinding wheel should be kept in an inclined position of 15-30 degrees with the workpiece surface; During cutting operations, the grinding wheel must not tilt or swing laterally.

15. When using electric scissors, the following requirements should be met: a. Before operation, the gap between the cutting heads should be adjusted according to the thickness of the steel plate; b. Do not exert too much force during homework. When encountering a sharp decrease in the number of reciprocating movements of the tool shaft, immediately reduce the thrust.

16. When using a nail gun, the following requirements should be met: a. It is strictly prohibited to push the nail barrel with the palm of the hand and align the muzzle with a person; b. When firing, the nail gun should be vertically pressed against the working surface. When the trigger is pulled twice and no bullets are fired, the original shooting position should be maintained for a few seconds before exiting the nail bullet; c. Before replacing parts or disconnecting the nail gun, there must be no nail bullets inside the gun.

17. When using a riveting gun, the following requirements should be met: a. The rivet holes on the riveted object should fit smoothly with the rivets and should not have too much interference; b. When riveting, when the rivet shaft is not pulled off, the trigger can be repeatedly pulled until it is pulled off, and it should not be forcibly twisted or pried off; c. If the riveting head or cap is loose during homework, it should be tightened immediately.

Sudong Intelligent Tightening Technology (Guangdong) Co., Ltd. (brand name SUDONG) is located in Dongguan, an advanced manufacturing center in the Guangdong Hong Kong Macao Greater Bay Area. Established in 2007, it is a professional high-tech enterprise that integrates the research and development, production, and sales of carbon free brush electric screwdrivers, torque testers, and peripheral supporting products.