The cutting machine is a compulsory certification product stipulated by the National Certification and Accreditation Administration. Therefore, when purchasing, you should first check whether the product has the 3C mark. The method of inspection is generally: whether there is 3C on the outer packaging of the tool or on the nameplate of the tool. If there is still doubt about this (because the manufacturer of the power tool has not passed the annual supervision review, the CNCA suspends or revokes its certificate), you can go to the website of the CNCA to check whether the 3C certificate of the tool is current. effective.
According to the needs of users, first distinguish between household and professional use. Since most of the power tools are designed for professionals, it is necessary to distinguish between professional and general households before purchasing. Usually, the difference between professional and general household tools is in power, and the tools used in professional use are relatively large, so that the professional can reduce the workload. The tools used in general households are relatively small in engineering and the workload is relatively small, so the tools are The input power does not need to be large.
Observe the outer packaging of the cutting machine. The outer packaging should have a clear pattern and no damage. Open the packaging box and observe the appearance of the cutting machine. The color should be uniform. There should be no obvious shadows and dents on the surface of the plastic parts. There should be no scratches or bumps on the surface. The misalignment between the parts is ≤0.5mm. The aluminum castings are smooth and beautiful without defects. The surface of the machine should be free of oil and stains. When holding by hand, the user feels better and the handle of the switch should be flat. The length of the cable should generally be no less than 2 meters.
Check the nameplate and instructions of the cutting machine. The nameplate parameters should be the same as those on the 3C certificate. The manufacturer's and manufacturer's detailed address and contact details should be available on the instruction manual. The serial number of the product traceable should be on the nameplate or certificate. Hold the cutting machine by hand, turn on the power, and frequently operate the switch by hand to make the tool start frequently, and observe whether the cutting function of the cutting machine switch is reliable. At the same time, observe whether there are any abnormalities in the TV sets and fluorescent lamps on the spot. In order to confirm whether the tool is equipped with a valid radio interference suppressor. The cutting machine is energized for one minute. When the machine is held by hand, the hand should not feel any abnormal vibration. Observe the reversing spark. The reversing spark should not exceed 1.5, generally from the air inlet of the tool. Look, there should be no obvious arc on the surface of the commutator. When running, there should be no abnormal noise, etc.