1,the general place chosen class II handheld tool motors and installation is not greater than the rated operating current shock 15mA,rated operating time of less than 0.1 seconds of leakage protection.The use of hand-held power tools Class I must also make then zero protection.The operator must wear insulated gloves,wear insulated boots or stand insulation mat.

2,when operating on wet places or metal frame,you must use Class II portable electric power tools,and installation of splash of leakage protection.Do not use Class I handheld power tools.

Class III handheld power tool 3,narrow spaces(inside boilers,metal containers,trench,pipe,etc.)should be selected with an isolation transformer;if the choice of class II hand-held power tool,to be fitted with a splash of leakage protection.The isolation transformer or leakage protector installed outside the narrow place,someone custody at work.

4,the load line handheld electric tools must be weather-resistant rubber sheath copper cable type and shall not have joints.Prohibit the use of plastic flowers line.

5,moisture,deformation,cracks,broken,chipped edge notch or contact with oils,wheel bases should not be used.Damp grinding wheel,self-drying may not be used.Wheel and then set the cushion should be installed securely,nut not too tight.

6,before the job must be checked:

(1)shell,the handle should be free of cracks,damage;

(2)protect access to zero connection should be correct,solid and reliable,the cord and plugs intact,switching should be normal,and noting that the operation switch;

(3)electrical protection equipment is good,reliable,complete mechanical guards.

7,the air operation after startup and operation inspection tool should be flexible and unhindered.

8,portable grinder,angle grinder,organic glass must be installed when operating afterburner to balance,not too much force.

9,prohibited overload,and pay attention to sound,temperature,abnormal should immediately stop inspection,operation time is too long,the temperature rises,should be shut down to be cooled prior to operation.

10,the job must not touch the cutting tools,molds,wheel,found blunt,breakage should be shut down immediately after the line repair replacement operations.

11,when the equipment can not let go running.

12,using an electric drill precautions;

(1)The drill should be top on the workpiece drilling,not runaway and top dead;

(2)drilling reinforced concrete should be avoided;

(3)must be perpendicular to the top of the piece,not shaking in the borehole;

(4)with a diameter of 25 mm or more impact drill,job site should be located around the fence.Above ground operation should be a solid platform.

13,using the angle grinder attention to the safety of the line wheel speed of 80 m/min,so that should make the grinding wheel and the Face maintain 15-30 degrees tilt position.For cutting wheel when not tilted.