3M 7000000328 Microfinishing Film Roll 372L 80 Micron

Product Description

The 3M 7000000328 is a microfinishing film roll (Type 2, Series 372L) designed for precision surface finishing on cylindrical components. It features aluminum oxide abrasive grain bonded with resin to a 5 mil polyester film backing. The backing includes a friction grip coating to resist slipping during operation. At 80 micron grade, this roll delivers controlled, repeatable stock removal and surface refinement. It is used by machinists, automotive technicians, and finishing specialists who require consistent results on tight-tolerance parts.

This roll measures 4 inches wide by 150 feet long with a 3 inch keyed core. The keyed core design (ASO) ensures positive engagement with compatible drive equipment. Typical applications include precision finishing of cylindrical surfaces such as automotive camshafts and crankshafts, as well as work on plastics, fiberglass, wood, metals, and solid surface materials. The anti-loading free-cut coating helps maintain cutting efficiency across these varied substrates.

Key Features

• 80 micron aluminum oxide abrasive for precision micron-grade finishing
• Resin bonded to a durable 5 mil polyester film backing
• Friction grip coating on backing for slip resistance during use
• Anti-loading free-cut coating extends usable roll life across multiple substrates
• ASO keyed core for positive engagement with compatible finishing equipment
• 4 inches x 150 feet roll format supports high-volume cylindrical finishing operations

Compatibility

Designed for use with finishing equipment that accepts a 3 inch ASO keyed core. Suitable for cylindrical finishing applications including automotive camshafts and crankshafts, and compatible with plastics, fiberglass, wood, metals, and solid surface materials.

Installation Notes

Loading and threading of microfinishing film rolls should be performed by qualified personnel familiar with the finishing equipment in use. Ensure the machine is powered down and all rotating components have come to a complete stop before loading or replacing the roll. Verify that the keyed core seats fully and engages positively with the drive spindle before resuming operation. Follow all applicable shop safety protocols and equipment manufacturer guidelines when running abrasive film at speed.

Technical Specifications

• Series: 372L
• Type: 2
• Abrasive Mineral: Aluminum Oxide
• Grade: 80 Micron
• Backing: 5 mil Polyester Film
• Backing Coating: Friction Grip
• Surface Coating: Anti-Loading Free-Cut
• Width: 4 inches
• Length: 150 feet
• Core Size: 3 inches
• Core Type: ASO Keyed
• Unit of Measure: Roll
• Minimum Order Quantity: 4
• UPC: 00051144149674

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000328