Before installation, the sand should be carefully checked to ensure no damage, dumb and deformation;

Ensure that the speed of machine operation does not exceed the maximum speed marked on sand or outer box;

Installation, pay attention to check the smoothness of the chuck, the correct diameter and whether the card is in place;

When operating, operators should wear safety glasses and take corresponding protective measures;

Choose the matched equipment, do not force installation or change the size of the installation hole;

When operating, it is strictly forbidden to stand around the cutting mill track;

Before polishing, the newly installed sand should be run for at least 30 seconds;

Do not damage the sand before use.