3M 7000044858 Diamond Lapping Film 663X 45 Micron 9x11 in

Product Description

The 3M 7000044858 is a diamond lapping film sheet used for precision surface finishing and polishing of hard materials including ceramics, carbide, optical components, and hardened steel. Sold in a 10-sheet pack, each sheet measures 9 inches x 11 inches and carries a 45-micron diamond abrasive coating bonded to a polyester film backing. The 663X designation identifies the film series, while the Type P classification indicates a pressure-sensitive or specific backing type. This film is used where tight surface finish tolerances are required and conventional abrasives lose cutting efficiency on hard substrates. Machinists, tool-and-die makers, optical technicians, and precision maintenance professionals are the primary installers and users.

Diamond lapping film in the 45-micron grade is suited for stock removal on the coarser end of the lapping spectrum before stepping down through finer grits. Common applications include lapping fiber optic connectors, precision flat lapping of carbide inserts, polishing ceramic seals, and reconditioning hardened tooling surfaces. The 9-inch x 11-inch sheet size is compatible with hand lapping fixtures, flat lapping plates, and backing pads used in bench or field finishing operations. Packaging of 10 sheets per pack and 100 sheets per case supports both single-job and high-volume shop use.

Key Features

• 45-micron diamond abrasive for aggressive stock removal on hard substrates
• 9 inches x 11 inches sheet size fits standard lapping fixtures and backing pads
• 663X film series engineered for consistent cut rate and long abrasive life
• Polyester film backing maintains dimensional stability under lapping pressure
• Sold in 10-sheet packs with 100-sheet case quantity available
• Suitable for ceramics, carbide, optical glass, and hardened steel finishing

Compatibility

Designed for use with flat lapping plates, hand lapping fixtures, and backing pads that accept standard 9-inch x 11-inch sheet abrasives in precision surface finishing applications.

Installation Notes

Diamond lapping film is typically used by machinists, optical technicians, and precision maintenance professionals working on hard-surface finishing tasks. Secure the sheet flat against a lapping plate or backing surface before use to prevent slipping and uneven material removal. Keep the work surface and film clean of contamination during lapping to avoid scratching. Follow the workpiece manufacturer or job specification for grit sequence when stepping through multiple micron grades.

Technical Specifications

• Model Series: 663X
• Type: P
• Abrasive Grade: 45 Micron
• Sheet Size: 9 inches x 11 inches
• Pack Quantity: 10 sheets per pack
• Case Quantity: 100 sheets per case
• Weight: 0.5 pounds
• UPC: 00051135645703

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044858