3M 7100103085 Diamond Lapping Film Disc 12 Inch Psa

Product Description

The 3M 7100103085 is a 12-inch diameter PSA-backed diamond lapping film disc designed for precision surface finishing on extremely hard materials. It features precisely graded diamond abrasive particles coated onto a polyester film substrate, delivering a consistent and repeatable finish across production runs. This disc is the PSA-mounted version of the 661X product line, identified as Diamond Lapping Film 668X. It is used in applications where tight surface finish tolerances are required, including optics, ceramics, carbide tooling, and similar hard substrates. Technicians and machinists working in precision grinding and lapping operations install this disc on flat-lap or rotary lapping machines.

This disc is suited for both production and finishing environments where surface geometry must be maintained with minimal edge rounding. The PSA backing allows for quick, secure mounting to compatible lapping plates and platens. Available grades in the 668X line range from 0.10 to 30.0 micron, making this disc part of a broader system that can address everything from stock removal to final finishing passes on hard material surfaces. It is sold individually and is appropriate for use in machine shops, optical fabrication facilities, and advanced manufacturing settings.

Key Features

• PSA backing allows direct mounting to flat-lap platens without additional adhesive
• Precisely graded diamond particles provide uniform, repeatable surface finish
• Fast cut rate supports increased throughput in production lapping operations
• Flat surface geometry with low edge rounding for tight tolerance work
• Long abrasive service life reduces frequency of disc changes
• Compatible with the broader 668X grade range from 0.10 to 30.0 micron

Compatibility

Designed for use on flat-lap and rotary lapping machines that accept 12-inch PSA-backed abrasive discs. This disc is the PSA-backed replacement format for the 661X diamond lapping film product.

Installation Notes

Installation is performed by machinists or precision finishing technicians. Before mounting, ensure the lapping platen surface is clean, dry, and free of debris to allow proper PSA adhesion. Power down all rotating equipment completely before removing a spent disc or applying a new one. Avoid contaminating the abrasive surface with oils or coolants not rated for diamond lapping film use, as this can reduce cut rate and finish quality.

Technical Specifications

• Diameter: 12 inches
• Backing Type: PSA (Pressure Sensitive Adhesive)
• Abrasive Material: Diamond
• Film Substrate: Polyester
• Grade Range Available: 0.10 to 30.0 micron
• Unit of Measure: Each
• Minimum Order Quantity: 10
• Weight: 0.06 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100103085