3M 7100037240 Diamond Lapping Film Disc 5 Inch Psa

Product Description

The 3M 7100037240 is a PSA-backed diamond lapping film disc designed for precision finishing of extremely hard materials. Precisely graded diamond abrasive particles are coated onto a dimensionally stable polyester film substrate, producing a consistent, repeatable surface finish across every pass. The pressure-sensitive adhesive backing secures the disc to a flat platen without fasteners. This disc measures 5 inches in diameter and is part of the 3M 668X series, which is the PSA-backed counterpart to the 661X film. Technicians working with ceramics, carbides, optical glass, fiber optics, or precision metal components rely on this disc to achieve flat, uniform surface finishes with minimal edge rounding.

This lapping film disc is used in precision finishing and polishing applications across industries including fiber optic connector polishing, semiconductor work, tool and die, and hard-material component finishing. The 668X series is available in grades ranging from 0.10 to 30.0 micron, allowing the user to select the appropriate grit stage for their finishing sequence. The PSA format is suited for use on flat lapping plates and rotary lapping machines where quick disc changes improve throughput.

Key Features

• PSA backing secures disc to lapping platen without mechanical fasteners
• Precisely graded diamond particles deliver a consistent, repeatable finish
• Fast cut rate increases throughput in multi-stage finishing sequences
• Flat surface geometry with low edge rounding on finished workpieces
• Long abrasive life reduces the frequency of disc changes
• Polyester film backing provides dimensional stability under load

Compatibility

Designed for use on flat lapping plates and rotary lapping machines that accept 5-inch PSA-backed abrasive discs. Part of the 3M 668X Diamond Lapping Film series, compatible with applications requiring graded diamond abrasives between 0.10 and 30.0 micron.

Installation Notes

This disc is installed by a technician onto a clean, flat lapping platen surface. Before mounting, ensure the platen surface is free of debris or residual adhesive that could affect disc flatness. Peel the liner and apply firm, even pressure across the full disc face to prevent air pockets. Follow applicable workplace safety guidelines when handling diamond abrasive products, including eye protection.

Technical Specifications

• Disc Diameter: 5 inches
• Backing Type: PSA (Pressure-Sensitive Adhesive)
• Abrasive Material: Diamond
• Substrate: Polyester Film
• Available Grades: 0.10 to 30.0 micron
• Unit of Measure: Each
• Weight: 0.01 pounds
• Package Length: 7.71 inches
• Package Width: 6.88 inches
• Package Height: 4.7 inches
• UPC: 00051111697382

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100037240