3M 7000044974 Diamond Microfinishing Film Roll 20 Micron

Product Description

The 3M 7000044974 is a diamond microfinishing film roll engineered for superfinishing and rapid finish reduction on exceptionally hard materials. Diamond mineral is bonded to a durable polyester film backing, delivering consistent cutting action and long service life. Measuring 4 inches wide by 50 feet long with a 3-inch core, this roll is sized for production and shop use. The 20-micron grade targets precise surface finish requirements on materials that conventional abrasives struggle to cut effectively. Machinists, tool-and-die shops, and surface finishing specialists rely on this product for controlled, repeatable results.

This microfinishing film roll is used in superfinishing operations on thermal spray coatings, ceramics, carbides, chilled iron, and granite. It is suited for applications where tight surface finish tolerances are required and conventional abrasive films or stones fall short. Typical scenarios include precision grinding and lapping operations in industrial, aerospace, and tooling environments where hard substrate finishing demands a consistent diamond abrasive medium.

Key Features

• Diamond mineral abrasive bonded to polyester film backing for durability and consistent cut rate
• 20-micron grade for superfinishing and rapid finish reduction on hard materials
• 4 inches x 50 ft roll format with 3-inch core suits production and bench shop setups
• Effective on thermal spray coatings, ceramics, carbides, chilled iron, and granite
• Polyester film backing resists tearing and maintains dimensional stability during use

Compatibility

Designed for use on hard materials including thermal spray coatings, ceramics, carbides, chilled iron, and granite where superfinishing or fast finish reduction is required.

Installation Notes

This product is installed and used by machinists, surface finishing technicians, and tool-and-die professionals. Ensure the workpiece is securely fixtured and the finishing equipment is powered down before loading or changing the abrasive film. Use appropriate personal protective equipment, including eye protection and gloves, when handling diamond abrasive media. Follow equipment manufacturer guidelines for film tension and feed rate to avoid tearing or uneven wear.

Technical Specifications

• Abrasive Mineral: Diamond
• Backing Material: Polyester film
• Grade: 20 micron
• Width: 4 inches
• Length: 50 ft
• Core Size: 3 inches
• Weight: 2 pounds
• Unit of Measure: Roll
• UPC: 00051141205700

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044974