3M 7000044838 Diamond Lapping Film Disc 8 Inch Psa

Product Description

The 3M 7000044838 is a PSA-backed diamond lapping film disc designed for precision finishing on extremely hard materials. The disc features precisely graded diamond abrasive particles coated onto a polyester film substrate, delivering a consistent and repeatable surface finish across every pass. At 8 inches in diameter, this disc is sized for bench lapping equipment commonly used in optical, ceramic, carbide, and advanced composite finishing applications. The pressure-sensitive adhesive backing allows for fast, secure mounting to compatible platens without additional fasteners. This product is part of the 3M 668X series, which is the PSA-backed counterpart to the 661X film.

This diamond lapping film disc is used in precision grinding and finishing operations where tight surface tolerance and minimal edge rounding are required. Typical applications include lapping optical fiber ferrules, ceramic components, tungsten carbide tooling, and other hard substrates that standard abrasive films cannot effectively process. The 8-inch disc format suits automated and semi-automated lapping machines in production and lab environments. Available grades in the 668X series range from 0.10 micron to 30.0 micron, allowing technicians to select the appropriate grit for roughing, intermediate, or final finishing stages.

Key Features

• PSA backing for fast, secure platen mounting without adhesive tape
• Precisely graded diamond particles for consistent, repeatable finish results
• Flat surface geometry with low edge rounding for tight tolerances
• Fast cut rate increases throughput and reduces cycle time
• Long abrasive life reduces the frequency of disc changes
• Available in grades from 0.10 to 30.0 micron to cover multiple finishing stages

Compatibility

Designed for use on lapping platens and fixtures that accept 8-inch PSA-backed abrasive discs. Suitable for finishing extremely hard materials including ceramics, carbide, optical glass, and composites.

Installation Notes

Installation is performed by precision finishing technicians or lab personnel. Before mounting, ensure the platen surface is clean and free of debris or residual adhesive from previous discs, as contamination will affect film adhesion and finish quality. Peel the liner and apply the disc firmly and evenly to the platen to avoid air pockets. Replace the disc when cut rate noticeably drops or surface finish consistency degrades.

Technical Specifications

• Diameter: 8 inches
• Backing Type: Pressure-Sensitive Adhesive (PSA)
• Abrasive Material: Diamond
• Film Substrate: Polyester
• Available Grit Range: 0.10 to 30.0 micron
• Weight: 0.03 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 25

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044838