Depressed center cutting wheel wheel no cracks no damage. Wheel must be in good condition no cracks, no damage. Should be visually inspected prior to installation, found dehiscence, is strictly prohibited. Rubber bonded grinding wheel selection is not allowed contact with oils, resin bonded grinding wheels are not allowed contact with alkali cutting wheels , otherwise it will reduce the strength of the wheel. Cutting wheel with high-speed rotation of the grinding wheel cutting steel. Grinding wheel with fiber, resin or rubber bonded abrasive made. In skilled manual operation, the Cut off wheels can be quickly and accurately cut, and cut neatly, no glitches. Wheel using a certain risk. For everyone's safety, listed below use precautions: machine shop grinding machine is one of the most commonly used machines and equipment, its installation is reasonable, whether compliance with safety requirements; its use is correct, whether compliance with safety rules .