3M 7100042644 Aluminum Oxide Lapping Disc 4 Inch

Product Description

The 3M 7100042644 is a 4-inch diameter aluminum oxide lapping disc engineered for precision polishing of fiber optic connectors. The disc features aluminum oxide coated mineral on a 3-mil polyester film base with a pressure-sensitive adhesive backing for secure, repositionable attachment to polishing fixtures. Tight particle size distribution across the abrasive layer produces a consistent cut rate and repeatable surface finish throughout the disc's service life. Available in 0.30 micron and 5.0 micron grades to cover both intermediate and final polishing steps in fiber optic termination workflows.

This disc is used in fiber optic connector polishing applications where surface quality directly affects signal transmission performance. Technicians working on SC, LC, ST, and similar connector types rely on lapping films like this one to achieve low-loss, low-reflection end-face geometry. The PSA backing allows fast disc changes on standard polishing pucks or machines without adhesive residue concerns. The 4-inch diameter suits the most common polishing fixtures used in production and field termination environments.

Key Features

• Aluminum oxide abrasive mineral on 3-mil polyester film substrate for dimensional stability
• Pressure-sensitive adhesive backing for quick, secure fixture attachment
• Tight particle distribution for consistent cut rate, finish, and disc life
• Available in 0.30 micron and 5.0 micron grades for multi-step polishing sequences
• 4-inch diameter fits standard fiber optic polishing pucks and fixtures

Compatibility

Designed for use with standard fiber optic connector polishing fixtures and pucks that accept 4-inch PSA-backed lapping films.

Installation Notes

Fiber optic polishing discs are applied to polishing pucks or machine platens by aligning and pressing the PSA side firmly to the fixture surface. Ensure the fixture surface is clean and free of dust or adhesive residue before applying a new disc to avoid uneven lapping. Follow connector manufacturer polishing sequences for micron grade progression. Disc changes and connector handling should be performed in a clean environment to prevent contamination of end faces.

Technical Specifications

• Diameter: 4 inches
• Abrasive Mineral: Aluminum Oxide
• Backing: 3-mil Polyester Film
• Attachment Type: Pressure-Sensitive Adhesive (PSA)
• Available Grits: 0.30 micron and 5.0 micron
• Weight: 0.01 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100042644