What is the CPSC standard for blade stopping time and blade tip speed?

The correct answer outlines the specific standards established by the Consumer Product Safety Commission (CPSC) regarding the safety performance of certain machinery, particularly in relation to blade stopping time and blade tip speed. According to CPSC guidelines, the maximum allowable blade stopping time for certain devices is set at 3 seconds, ensuring that blades do not remain operational long after the switch has been disengaged. This is crucial for enhancing user safety and minimizing the risk of accidental contact with spinning blades.

Moreover, the standard of 19,000 feet per minute for blade tip speed is established to prevent excessive speed that could lead to increased dangers, such as the risk of injury or the creation of high-velocity projectiles from broken blades. By keeping the blade tip speed within this limit, manufacturers can further mitigate potential hazards associated with the operation of such machinery.

This combination of stopping time and tip speed is specifically designed to promote a safer working environment while allowing equipment to perform effectively within established safety parameters. Understanding these specifications is critical for technicians when evaluating machinery for compliance and safety standards.