3M 7000000308 Diamond Lapping Film 45.0 Micron 4in X 50ft Roll

Product Description

The 3M 7000000308 is a diamond lapping film supplied in roll form, engineered for precision material removal and surface finishing in demanding industrial applications. Built on a stronger resin system, it delivers added toughness and extended service life compared to standard lapping films. At a 45.0 micron grade, this film is well-suited for superfinishing, roll polishing, and flat lapping operations where controlled, repeatable stock removal is required. The roll measures 4 inches wide by 50 feet long, wound on a 3-inch core, making it compatible with automated and semi-automated finishing equipment used by tool-and-die shops, precision machinists, and optics technicians.

This diamond lapping film is used primarily in superfinishing, roll polishing, and flat lapping applications across industrial and precision manufacturing environments. It is appropriate for finishing hard materials including carbide, ceramics, glass, and hardened steel where consistent surface finish is critical. The 45.0 micron grade positions it in the mid-range of the available lineup, which also includes 30.0 and 60.0 micron options for finer or coarser finishing stages respectively.

Key Features

• 45.0 micron diamond abrasive grade for controlled mid-range material removal
• Stronger resin system provides added film toughness and longer working life
• Roll format (4 inches x 50 feet) suits automated and bench-top lapping equipment
• 3-inch core accommodates standard roll-finishing machine mandrels
• Suitable for superfinishing, roll polishing, and flat lapping operations
• Available in 30.0, 45.0, and 60.0 micron grades for multi-stage finishing sequences

Compatibility

Designed for use in roll-fed lapping and superfinishing machines that accept 4-inch wide film rolls on a 3-inch core. Suitable for finishing carbide, ceramics, glass, and hardened steel substrates in precision manufacturing and optical finishing applications.

Installation Notes

Installation and loading of lapping film rolls should be performed by qualified machinists or finishing technicians familiar with the specific equipment being used. Ensure the machine is powered down and all moving components have come to a complete stop before threading or replacing the film roll. Verify that the roll core diameter and film width match the machine manufacturer's specifications before loading. Follow the equipment manufacturer's recommended feed rate and pressure settings for the selected micron grade to avoid premature film wear or substrate damage.

Technical Specifications

• Micron Grade: 45.0 micron
• Roll Width: 4 inches
• Roll Length: 50 feet
• Core Diameter: 3 inches
• Unit of Measure: Roll
• Weight: 6 pounds
• UPC: 00051111499740

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000308