3M 7000139766 Abrasive Belt 132 Inch Aluminum Oxide

Product Description

The 3M 7000139766 is a Trizact 307EA coated abrasive belt designed for precision intermediate finishing and fine polishing applications. It uses 3M microreplication technology, where micron-graded aluminum oxide particles are formed into three-dimensional pyramids and bonded to a flexible rayon cloth backing. As the surface pyramids wear, fresh abrasive mineral is continuously exposed, delivering a consistent cut rate and a predictable fine finish throughout the belt's service life. Measuring 132 inches in length and 2-1/8 inches in width, this belt is sized for larger industrial and robotic finishing operations where repeatability is critical.

This belt is suited for metalworking environments where surface preparation ahead of plating, buffing, or coating is required. The flexible rayon backing allows the belt to conform to contoured workpiece surfaces, making it practical for complex profiles as well as flat stock. It is commonly used in automated and robotic finishing lines where consistent finish grades across high part volumes are required. Manual bench and stroke-sander applications that demand fine, repeatable surface finishes also benefit from this belt's self-sharpening abrasive structure.

Key Features

• Microreplication technology forms aluminum oxide into pyramid-shaped abrasive structures for self-sharpening performance
• Continuously exposed fresh mineral maintains consistent cut rate and finish quality throughout belt life
• Flexible rayon cloth backing conforms to contoured and complex workpiece surfaces
• Three-dimensional abrasive design produces highly repeatable finishes in robotic and automated applications
• Runs cooler than conventional abrasives, reducing heat-related workpiece distortion risk
• Produces finer finishes than conventional electrostatically coated abrasive belts

Compatibility

Designed for use on belt sanders, stroke sanders, and automated robotic finishing systems that accept a 132-inch by 2-1/8-inch abrasive belt. Suitable for ferrous and non-ferrous metal finishing applications prior to plating or buffing operations.

Installation Notes

Installation should be performed by qualified personnel familiar with abrasive belt equipment. Verify that the machine's contact wheel and platen are sized to accept this belt's dimensions before mounting. Confirm belt tension and tracking per the equipment manufacturer's specifications before running. Power down and lock out the machine before changing belts to prevent accidental start-up.