3M 7000000257 Diamond Lapping Film 15.0 Micron 8x50 Ft

Product Description

The 3M 7000000257 is a diamond lapping film supplied in roll form, used for precision surface finishing and material removal on extremely hard substrates. The film consists of precisely graded diamond abrasive particles coated onto a dimensionally stable polyester film backing. At 15.0 micron grit size, this grade sits in the mid-range of the available lineup and is suited for controlled stock removal before moving to finer finishing passes. The roll measures 8 inches wide by 50 feet long with a 3-inch core, making it compatible with standard roll-fed lapping and polishing equipment. Finished weight is 3.6 pounds. Technicians working with ceramics, carbide, hardened steel, optical components, or fiber optic ferrules rely on this film where consistent, repeatable surface finish is required.

This lapping film is used in precision grinding, polishing, and finishing applications across industries that demand tight surface-finish tolerances. Typical applications include tool and die shops, fiber optic connector polishing, semiconductor component finishing, and precision machining environments. The 15.0 micron grade is commonly used as an intermediate stock-removal step in a multi-stage finishing sequence. It is suitable for use on bench lapping fixtures, rotary polishing machines, or hand lapping plates where film stock is fed from a roll format.

Key Features

• Precisely graded diamond particles for consistent, repeatable material removal
• 15.0 micron abrasive grade for intermediate lapping and stock removal
• Polyester film backing provides dimensional stability during use
• Roll format: 8 inches wide x 50 feet long on a 3-inch core
• Effective on extremely hard materials including carbide, ceramic, and hardened steel
• Available in multiple grades ranging from 0.10 to 30.0 micron for full finishing sequences

Compatibility

Designed for use with standard roll-fed lapping, polishing, and surface-finishing equipment that accepts 8-inch wide film stock on a 3-inch core. Verify equipment roll width and core diameter before installation.

Installation Notes

Installation and use of lapping film should be performed by qualified technicians familiar with precision surface-finishing equipment and procedures. Ensure the lapping machine or fixture is powered down and fully stopped before loading or advancing film stock. Keep the film surface free of contamination — oils, debris, or damaged sections will affect finish consistency. Follow the equipment manufacturer's feed and tension specifications when loading the roll.

Technical Specifications

• Abrasive Grade: 15.0 micron
• Abrasive Type: Diamond
• Backing Material: Polyester film
• Roll Width: 8 inches
• Roll Length: 50 feet
• Core Diameter: 3 inches
• Unit of Measure: Roll
• Weight: 3.6 pounds
• UPC: 00051111698808

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000257