If a sanding disk comes loose during operation, the immediate action is to

• A. Continue operating at reduced speed
• B. Secure it with tape and keep going
• C. Shut off the sander and inspect the disk mount
• D. Stop, tighten or replace the sanding disk

Answer: (D)

When a sanding disk comes loose, safety is the priority because the disk can fly off at high speed and cause serious injury or damage. Stop the sander immediately, switch off the power, and unplug it if possible. Then inspect the disk mounting: look for cracks or wear in the disk and backing pad, and check that the mounting hardware (nut, clamp, or arbor) is in good condition and properly seated. Make sure the disk is the correct size and speed rating for the tool, and that it sits flat and true with no wobble. If the disk or mounting hardware is damaged, replace it and reinstall it with the manufacturer’s recommended torque. After reattaching, ensure everything is secure and the guard is in place, then test at a very low speed to confirm stability before normal use.