Once grinding wheel cracks, chips or bursts during operation, operators must follow standardized emergency disposal procedures to avoid accidental injury caused by flying abrasive fragments. First of all, cut off the equipment power supply immediately and shut down the grinding machine completely. Do not attempt to brake the rotating wheel by hand or any tool to prevent abrasion scratch or finger cutting by residual broken wheel pieces. After the spindle stops rotating naturally, set up obvious warning barriers around the machine station to forbid irrelevant staff from approaching the operating area, avoiding secondary accidental collision or mistaken start-up of the faulty equipment.

Next, conduct full-site cleaning. Collect all broken wheel fragments with thick rubber gloves, classify intact leftover wheel hubs and crushed abrasive scraps separately, and place waste fragments into specified sealed metal waste containers instead of random stacking on the ground. Randomly discarded broken wheel residues may lead to slips or accidental puncture of operators during subsequent workshop walking. Meanwhile, carefully inspect the grinding machine spindle, flange, clamping gasket and protective cover for deformation, crack or scratch damage caused by wheel bursting. Deformed flanges and damaged spindle cannot continue to be used; replace damaged spare parts strictly before next equipment commissioning.

After on-site cleaning and equipment inspection, record detailed accident information on workshop safety logbooks, including breaking time, working load before cracking, wheel specification, operating speed and possible inducement such as overloading, improper clamping or ultra-high grinding pressure. Analyze root causes of wheel damage: common triggers include unqualified wheel quality, improper storage leading to hidden cracks before installation, excessive tightening force during clamping, exceeding rated linear speed, and fierce impact during grinding work. Summarize preventive measures to avoid repeated accidents.

Damaged broken grinding wheels are prohibited from secondary bonding, trimming or re-installation for production use, even if partial wheel body remains complete. Any grinding wheel with invisible internal micro-cracks hidden after partial fragmentation poses severe splashing risk under high-speed rotation. Before installing new replacement grinding wheels, conduct hammer tapping inspection to check internal cracks again, confirm matching specification with machine rated parameters, and finish correct clamping in accordance with operating specifications. Complete trial idling operation for several minutes without workpiece grinding to verify stable running status before formal processing.