3M 7000000302 Diamond Lapping Film 6.0 Micron 4x50ft

Product Description

The 3M 7000000302 is a diamond lapping film supplied in roll form, designed for precision surface finishing on extremely hard materials such as ceramics, carbide, optical glass, and hardened steel. Precisely graded diamond abrasive particles are coated onto a dimensionally stable polyester film backing, producing a consistent cut rate and repeatable surface finish across the full length of the roll. The 6.0 micron grade makes this film well suited to intermediate lapping stages where controlled stock removal and fine surface refinement are both required. It is used by tool and die technicians, optical fabricators, and precision machinists.

This roll format measures 4 inches wide by 50 feet long on a 3-inch core, making it compatible with automated lapping machines, hand lapping fixtures, and spindle-driven film finishing systems. The 6.0 micron grade fits within the broader 3M Diamond Lapping Film range, which spans 0.10 to 30.0 micron, allowing a multi-stage finishing sequence using matched film grades. Typical applications include fiber optic connector polishing, precision bore finishing, and cutting tool reconditioning where surface geometry and finish must be held to tight tolerances.

Key Features

• Precisely graded 6.0 micron diamond abrasive for controlled, repeatable stock removal
• Polyester film backing provides dimensional stability and resistance to tearing during use
• Roll format (4 inches x 50 feet) supports both manual and machine lapping setups
• 3-inch core fits standard roll holders and automated film feed systems
• Effective on extremely hard workpiece materials including ceramics, carbide, and hardened steel
• Part of a graded series from 0.10 to 30.0 micron to support full multi-stage lapping sequences

Compatibility

Designed for use on lapping machines, polishing fixtures, and hand lapping setups that accept a 4-inch-wide roll on a 3-inch core. Suitable for finishing extremely hard materials including ceramics, optical glass, carbide, and hardened metals.

Installation Notes

Installation and use of lapping film should be performed by qualified technicians familiar with precision surface finishing processes. Ensure the workpiece, fixture, and lapping plate are clean and free of debris before loading the film to prevent scratching or contamination of the finish surface. Use only the coolant or lubricant recommended for the specific workpiece material and lapping machine. Replace the film section when cut rate or finish quality degrades rather than attempting to restore a worn abrasive surface.

Technical Specifications

• Abrasive Grade: 6.0 micron
• Abrasive Type: Diamond
• Backing Material: Polyester film
• Roll Width: 4 inches
• Roll Length: 50 feet
• Core Diameter: 3 inches
• Unit of Measure: Roll
• Weight: 1.5 pounds
• UPC: 00051111499573

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000302