3M 7010307992 Aluminum Oxide Lapping Disc 4.25 in Psa

Product Description

The 3M 7010307992 is an aluminum oxide lapping disc engineered for precision abrasive finishing applications. The disc features aluminum oxide mineral coated onto a 3 mil polyester film substrate, bonded with a durable resin system and finished with a pressure-sensitive adhesive (PSA) backing for fast, secure attachment to backing plates. Available in seven grades ranging from 0.05 to 60.0 micron, this disc delivers a tight particle distribution that produces consistent cut rates, surface finishes, and disc life across production runs. The 4.25-inch diameter format suits benchtop and handheld finishing tools commonly used by precision technicians and trade professionals.

This disc is designed for demanding precision finishing tasks, primarily fiber optic connector end-face finishing and roll superfinishing operations. The harder resin system compared to the 261X series makes it well suited for applications requiring more aggressive, controlled material removal while still achieving fine surface finish targets. It is used in industrial, telecommunications, and precision manufacturing environments where repeatable finish quality is critical.

Key Features

• PSA backing allows quick, secure attachment and removal from compatible backing plates
• Tight particle distribution ensures consistent finish quality across the disc surface
• Harder resin system than the 261X series for improved cut rate and disc longevity
• Aluminum oxide mineral on 3 mil polyester film for dimensional stability during use
• Available in seven micron grades from 0.05 to 60.0 micron for multi-stage finishing sequences
• Common applications include fiber optic finishing and roll superfinishing

Compatibility

Designed for use with PSA-compatible backing plates and holders used in precision lapping and superfinishing equipment. Specific model compatibility was not provided in the product data; verify backing plate diameter and PSA compatibility before installation.

Installation Notes

Installation is performed by precision technicians or qualified machine operators familiar with lapping and superfinishing equipment. Before mounting the disc, ensure the backing plate surface is clean, dry, and free of adhesive residue from previous discs to achieve full PSA contact. Press the disc firmly onto the backing plate from center to edge to eliminate air pockets. Follow equipment manufacturer guidelines and applicable workplace safety protocols when operating abrasive finishing machinery.

Technical Specifications

• Mineral Type: Aluminum Oxide
• Backing Material: 3 mil Polyester Film
• Attachment Type: Pressure-Sensitive Adhesive (PSA)
• Diameter: 4.25 inches
• Available Micron Grades: 0.05 to 60.0 micron (7 grades)
• Height (packaged): 0.55 inches
• Weight: 0.212 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010307992