THE WORLD STANDARD These filament composite tubes have set a precedent for electrical dielectric properties within the armatures of millions of electric motors. Inside hand-held power tools, appliance motors and other electrical equipment throughout the world is a POLYGON TUBE®. INTRODUCTION: The Polygon Tube is the insulation sleeve that provides armatures of electric motors a secondary layer of insulation. This secondary insulation is needed to provide increased protection for operators of electrical appliances from shock. The use of the additional layer of insulation allows the appliance to be rated "Double Insulated" and the need for grounding of the appliance is eliminated. Even though an appliance is grounded by means of a three-wire power cord, it is still a good practice to provide a secondary layer of insulation. The information provided is to assist in the design and assembly of the "POLYGON TUBE®" into armatures of electric motors. PATENTED MANUFACTURING PROCESS Polygon utilizes two bonding processes to manufacture tubes that provide optimum physical and dielectric performance. These processes capitalize upon the individual chemical and mechanical strengths of both chemical resin bonds and structural support maximizing the total strengths of the POLYGON TUBE®. These insulating composite tubes utilize their inherent modulus of elasticity to ensure a permanent press fit on the armature shaft. POLYGON TUBE® provides high torque strengths and has a UL Certified continuous temperature rating of 180C. This patented manufacturing techniques produced double insulated tubes with unparalleled physical properties and unmatched electrical insulation.