3M 7000000309 Diamond Lapping Film Roll 45.0 Micron 8x50ft

Product Description

The 3M 7000000309 is a diamond lapping film supplied in roll form, engineered for precision material removal and surface finishing in demanding industrial and trade applications. Built on a reinforced resin system, the film delivers added toughness and extended service life compared to standard lapping films. At 45.0 microns, it occupies the mid-range of the 663X series grade lineup, making it well suited for stock removal passes that precede fine finishing steps. The roll measures 8 inches wide by 50 feet long on a 3-inch core, providing substantial working area for continuous or high-volume surface conditioning operations.

This film is used primarily in superfinishing, roll polishing, and flat lapping applications across metalworking, precision machining, and optical component finishing environments. The 45.0 micron grade is a common choice when the workpiece requires consistent scratch pattern control before progressing to finer abrasive stages. The roll format is practical for automated polishing equipment, wide-belt surface finishing machines, and hand-fed flat lapping setups where a long continuous abrasive surface is required. Industrial maintenance technicians and precision grinding specialists are the typical end users.

Key Features

• 45.0 micron diamond abrasive grade for mid-range stock removal and surface conditioning
• Reinforced resin bond system provides increased toughness and longer film life
• Roll format: 8 inches wide by 50 feet long on a 3-inch core for continuous feed use
• Part of the 663X series, available in 30.0, 45.0, and 60.0 micron grades for tiered finishing sequences
• Suited for superfinishing, roll polishing, and flat lapping applications

Compatibility

Designed for use in roll polishing machines, flat lapping equipment, and superfinishing systems that accept an 8-inch wide roll on a 3-inch core. Verify equipment roll width and core diameter specifications before installation.

Installation Notes

Installation is typically performed by a machinist or surface finishing technician familiar with the specific polishing or lapping equipment in use. Power down and lock out the machine before threading or changing the film roll. Ensure the roll core seats securely on the machine mandrel and that film tension is set per the equipment manufacturer's guidelines. Follow applicable workplace safety standards for abrasive product handling.

Technical Specifications

• Abrasive Grade: 45.0 micron
• Film Series: 663X Diamond Lapping Film
• Roll Width: 8 inches
• Roll Length: 50 feet
• Core Diameter: 3 inches
• Unit of Measure: Roll
• Weight: 4.6 pounds
• UPC: 00051111499757

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000309