(1) According to the power source, there are two types: pneumatic and electric. The pneumatic type is safer, but it needs an air source; the electric type is easy to solve the power problem, but we must pay attention to the safety of electricity.
(2) According to the functions, there are two kinds of dual-function industrial sanding/polishing machines and simple polishing machines. The dual-function industrial abrasive polishing machine can be equipped with a grinding wheel to polish metal materials, and can also be replaced with a polishing disc for car paint protection. This machine is heavy, 2-3 kg, but it works very smoothly and is not easy to be damaged. The speed of this model can be adjusted, which is suitable for professional beauty care personnel. The simple polishing machine is actually a drilling machine, small in size, non-adjustable in speed, and difficult to balance when using it; professional beauty care personnel generally do not use this type of machine.
(3) According to the speed classification, there are three types of high-speed polishing machines, medium-speed polishing machines and low-speed polishing machines. The speed of the high-speed polishing machine is 1750-3000 r/mAn, and the speed is adjustable; the speed of the medium-speed polishing machine is 1 200-1 600 r/rain, and the speed is adjustable; the speed of the low-speed polishing machine is 1 200 r/min, and the speed is not adjustable.
