3M 7000021270 Lapping Disc 5 Inch Silicon Carbide

Product Description

The 3M 7000021270 is a silicon carbide lapping disc designed for precision polishing in fiber optic and metallurgical applications. The abrasive mineral is coated on a 3 mil polyester film backing, which provides dimensional stability and consistent contact across the work surface. Available in multiple micron grades including 5.0, 9.0, 15.0, and 30.0 micron, this disc delivers tight particle distribution that translates to a repeatable cut rate, predictable finish quality, and reliable disc life. Technicians and lab professionals working with fiber optic connector end-face preparation or metallurgical sample preparation will find this disc suited for controlled, fine-finish lapping work.

This disc is the standard product in the 3M silicon carbide lapping film line for fiber optic polishing and metallurgical applications. The 5 inch diameter format fits polishing fixtures and machines commonly used in fiber optic termination and cross-section preparation workflows. It is also used in quality-control labs where consistent surface finish is required across production volumes. The product is sold individually and is also available in sheet and roll formats for operations requiring different fixture types or higher-throughput setups.

Key Features

• Silicon carbide mineral on a 3 mil polyester film backing for stable, consistent abrasive contact
• Tight particle distribution ensures uniform cut rate and finish across the disc surface
• Available in 5.0, 9.0, 15.0, and 30.0 micron grades to match polishing stage requirements
• 5 inch diameter fits standard fiber optic and metallurgical polishing fixtures
• Consistent disc life reduces process variability in production and lab environments
• Also available in sheets and rolls for alternative fixture and workflow configurations

Compatibility

Designed for use in fiber optic connector polishing machines and metallurgical sample preparation fixtures that accept 5 inch diameter lapping film discs.

Installation Notes

Lapping discs of this type are typically installed and replaced by fiber optic technicians or lab technicians following equipment manufacturer guidelines for their specific polishing machines. Ensure the polishing platen is clean and free of debris before applying the disc to maintain flat, even abrasive contact. Follow equipment manufacturer instructions for disc mounting, applied pressure, and rotation speed. Dispose of used discs per facility waste procedures, especially in metallurgical environments where sample material residue may be present.

Technical Specifications

• Abrasive Mineral: Silicon Carbide
• Backing: 3 mil polyester film
• Disc Diameter: 5 inches
• Available Micron Grades: 5.0, 9.0, 15.0, 30.0 micron
• Weight: 0.01 pounds
• Package Length: 7.71 inches
• Package Width: 6.88 inches
• Package Height: 4.7 inches
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000021270