# Ensure that sanding belts are not too tight or too loose. Never operate a sanding disk if the paper is loose. # Use the correct grade of abrasive material for the job. # Ensure that the distance between a circular sander and the edge of the table is not greater than 1/4 inch. # Do not push materials against sanders with excessive force. # Sand only on the downstroke side of a disk sander. # Do not hold small pieces by hand. Use a jig for pieces that are difficult to hold securely