Why does my RYOBI Angle Grinder keep cutting out?

RYOBI Angle Grinders include several safety and protection systems, such as overload, over-temperature, and anti-kickback features. If your tool stops unexpectedly, consider the following: 

1. Excess Force

Applying too much downward pressure slows the motor significantly, which can trigger the overload protection and cause the tool to cut out.

Solution: Reduce the amount of force applied. Let the disc do the work rather than forcing it through the material. 

2. Angle of Application

Cutting at an incorrect angle (leaning or tilting onto the disc) can create uneven load and cause the grinder to stop.

Solution: Ensure the material is properly supported using clamps and positioned on a stable, even surface. Maintain a straight, controlled cut.

3. Battery Issues

• Low Charge: Performance may drop when the battery is below half charge. Fully recharge before heavy tasks.
• Battery Size: A battery that is too small for the current draw required (e.g., 2.0Ah) can cause the tool to cut out under load. 

Solution: For grinding, use a minimum 4.0Ah battery, ideally 5.0Ah or higher for optimal runtime and power. 

4. Overheating

Continuous heavy use or poor ventilation can cause the tool to overheat, activating thermal protection. 

Solution: Allow the grinder to cool down before restarting. Avoid prolonged heavy grinding without breaks. 

If the issue persists and your product is still within the warranty period, return it to your retailer with proof of purchase for assessment.