If a diamond blade gets red hot, what should be done?

When a diamond blade becomes red hot, it indicates that it is overheating, which can lead to significant damage or a decrease in its effectiveness. Discontinuing use until the blade cools allows for the safe operation of the tool and prevents risks such as losing the blade's integrity or creating hazardous situations with sparks and debris.

Cooling with water immediately or submerging it in oil, while potentially beneficial for other tools or materials, may not be advisable for diamond blades. Water might cause thermal shock and damage, while oil can ignite due to the high temperatures. Thus, letting it cool naturally in the air ensures the longevity and effectiveness of the diamond blade while maintaining safe working conditions.