3M 7000139280 Trizact 237AA Abrasive Belt 48x24 Inch

Product Description

The 3M 7000139280 is a Trizact 237AA coated abrasive belt designed for 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 onto an X weight cloth backing. As the abrasive pyramids wear during use, fresh cutting mineral is continuously exposed. This self-renewing action delivers a consistent cut rate and a predictable, fine surface finish from start to finish. The belt measures 48 inches in length and 24 inches in width. It is suited for metalworking environments where controlled finishes are required before plating, buffing, or final surface treatment.

This belt is used in intermediate and fine finishing operations on metal workpieces, including pre-plate and pre-buff surface preparation. The flexible X weight cloth backing conforms to contours, making it appropriate for both flat stock and profiled parts. The three-dimensional abrasive structure is particularly well suited to robotic and automated grinding and finishing systems, where consistent finish throughout the full belt life is required. It is installed and operated by metal finishing technicians, fabricators, and production grinding specialists.

Key Features

• Microreplication technology forms aluminum oxide into self-sharpening pyramidal structures for consistent cut and finish
• Self-sharpening design runs cooler than conventional abrasive belts, reducing heat-related workpiece distortion
• Flexible X weight cloth backing conforms to contoured surfaces for uniform finish
• Three-dimensional abrasive structure maintains consistent finishes throughout belt life in robotic applications
• Produces finer surface finishes than conventionally electrostatically coated abrasives
• Suited for intermediate finishing and fine polishing prior to plating or buffing

Compatibility

Designed for use on belt grinders and finishing machines that accept 48-inch by 24-inch abrasive belts. Verify machine contact wheel diameter, platen size, and belt tracking specifications before installation.

Installation Notes

Installation should be performed by qualified metal finishing or fabrication personnel. Power down and lock out the belt grinder or finishing machine before changing belts, following OSHA lockout/tagout procedures. Confirm belt tracking direction arrows align with machine drive direction before starting. Inspect the contact wheel and platen for wear or damage prior to mounting a new belt.

Technical Specifications

• Abrasive Mineral: Aluminum Oxide
• Abrasive Type: Trizact Microreplication
• Backing Material: X Weight Cloth
• Belt Length: 48 inches
• Belt Width: 24 inches
• Color: Gray
• Unit of Measure: Each
• Minimum Order Quantity: 5
• Weight: 7.145 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000139280