Here are the five points you need to pay attention to when using 4.5 inches grinding disc last time. 1. 4.5 inches grinding disc during the grinding process, the coolant should be used correctly; if the coolant is not used, it must be dust-proof. 2. Each resin disc has a high level of use and line speed. Be sure to check the speed of the machine before installing the machine. Do not exceed the speed indicated on the disc to ensure that the machine has a complete protective device, the center hole of the disc and the center shaft of the disc. Must match, otherwise, it cannot be used. 3. The resin discs on both sides of the flange must have the same shape and size as the cheap metal grinding disc. The flange diameter should meet the requirements, and there should be grooves on both sides. 4. Be sure to tighten and fit when installing and fixing. After the installation is complete, idle the machine for about one minute. 5. Regardless of whether it is ground or not, the pressure given should be uniform. When the grinding disc is adjusted to rotate, it is strictly prohibited to collide with the workpiece. When entering the tool, it should be carried out gradually. When cutting large diameter workpieces, reduce the contact surface between the grinding wheel and the workpiece. If you are looking for high-quality metal grinding discs and cheaper grinding discs in China, please contact us.