3M 7000044991 Microfinishing Film Roll 40 Micron

Product Description

The 3M 7000044991 Microfinishing Film Roll 372L is a precision abrasive roll designed for high-tolerance surface finishing of cylindrical components. It consists of aluminum oxide abrasive particles resin-bonded to a 5 MIL polyester film backing. The backing features a friction grip coating that resists slipping during operation, supporting consistent stock removal and finish quality. At 40 micron grit, this roll delivers fine, controlled material removal suited to demanding finishing applications. It is used by machinists, automotive technicians, and production finishing professionals working on tight-tolerance cylindrical surfaces.

This microfinishing film roll is intended for precision finishing of cylindrical surfaces including automotive camshafts and crankshafts. The 0.393-inch width and 900-foot length make it well suited to automated or semi-automated roll finishing equipment where continuous abrasive feed is required. The polyester film backing provides dimensional stability under tension, which helps maintain consistent contact across the workpiece surface. It is sold by the roll and is available with a minimum order quantity of 3 rolls.

Key Features

• Aluminum oxide abrasive resin-bonded to a 5 MIL polyester film backing for durability and dimensional stability
• 40 micron grit rating for precision, fine-tolerance surface finishing
• Friction grip coating on the backing reduces slipping during use
• 0.393-inch width and 900-foot length supports continuous-feed finishing equipment
• Designed for cylindrical surface applications including camshafts and crankshafts

Compatibility

Designed for use on cylindrical finishing equipment and lapping machines that accept roll-style abrasive film. Suitable for precision finishing of automotive camshafts and crankshafts as noted by the manufacturer.

Installation Notes

This product is installed by machinists or finishing technicians on roll-fed surface finishing or lapping equipment. Ensure the machine is powered down and secured before threading or replacing the abrasive roll. Follow equipment manufacturer guidelines for proper roll tensioning to maintain consistent surface contact. Wear appropriate PPE including eye protection and gloves when handling abrasive film.

Technical Specifications

• Abrasive Material: Aluminum Oxide
• Backing: 5 MIL Polyester Film
• Grit: 40 Micron
• Width: 0.393 inches
• Length: 900 ft
• Core Size: 1 inch
• Backing Feature: Friction Grip Coating
• Unit of Measure: Roll
• Minimum Order Quantity: 3
• UPC: 00051141206615

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044991