3M 7000008838 Diamond Lapping Film Disc 8 Inch

Product Description

The 3M 7000008838 is a diamond lapping film disc engineered for precision finishing on extremely hard materials. Precisely graded diamond particles are bonded to a durable polyester film backing, producing a consistent, repeatable surface finish across every pass. The disc measures 8 inches in diameter and is sold individually. It is well suited to applications where surface geometry and edge sharpness are critical, including optical components, ceramics, carbide tooling, and hard metal alloys. Technicians and machinists who require tight finish tolerances rely on this format for its flat, uniform cut.

This disc is used in lapping and polishing operations on hard substrates where conventional abrasives lose effectiveness. Typical applications include fiber optic connector end-face finishing, ceramic and sapphire component polishing, and precision lapping of carbide or hardened steel surfaces. The polyester film base resists tearing and maintains dimensional stability under moderate lapping pressure, supporting repeatable results across production runs. Available grades in the 3M diamond lapping film line range from 0.10 to 30.0 micron, allowing users to select the appropriate cut for rough stock removal through final polish stages.

Key Features

• Precisely graded diamond particles deliver a uniform, repeatable finish on hard materials
• Polyester film backing provides dimensional stability and tear resistance during lapping
• Fast cutting action supports higher throughput compared to conventional abrasive films
• Produces flatter surfaces and sharper edges critical to tight-tolerance applications
• 8 inch disc format is compatible with standard lapping machine platens and fixture holders

Compatibility

Designed for use on extremely hard materials including optical glass, ceramics, carbide, and hardened metals on standard lapping and polishing equipment accepting 8 inch diameter film discs.

Installation Notes

Diamond lapping film discs are typically handled and mounted by machinists or precision finishing technicians following equipment manufacturer guidelines. Secure the disc flat against the platen before applying pressure to prevent wrinkle-induced surface defects. Keep the work surface and disc free of contamination between grades when progressing through a multi-step finishing sequence. Dispose of used discs according to facility waste management procedures for abrasive media.

Technical Specifications

• Diameter: 8 inches
• Backing Material: Polyester film
• Abrasive Type: Diamond
• Available Grades: 0.10 to 30.0 micron
• Unit of Measure: Each
• Weight: 0.02 pounds
• Minimum Order Quantity: 25

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000008838