3M 7000044859 Diamond Lapping Film 668X 3.0 Micron Psa

Product Description

The 3M 7000044859 is a pressure-sensitive adhesive (PSA) diamond lapping film designed for precision surface finishing on extremely hard materials. Built on a stable polyester film backing, it features precisely graded 3.0 micron diamond abrasive particles that deliver a consistent, repeatable finish from sheet to sheet. At 9 inches x 11 inches, each sheet provides a generous working surface suited to flat-lapping fixtures, backing plates, and hand-lapping applications. This film is used by machinists, optical technicians, toolmakers, and precision maintenance trades requiring tight surface finish control.

This lapping film is suited for finishing operations on hardened steel, ceramics, carbide, optical glass, and other hard substrates where conventional abrasives lose effectiveness. The PSA backing allows the sheet to adhere directly to a flat plate or lapping fixture, holding position during use without slippage. It is sold in a minimum quantity of 10 sheets per order, making it appropriate for shop stock and recurring maintenance programs.

Key Features

• 3.0 micron precisely graded diamond abrasive for tight, repeatable surface finish tolerances
• PSA backing adheres to flat lapping plates or fixtures without separate adhesive
• Polyester film substrate resists tearing and dimensional distortion during use
• 9 inches x 11 inches sheet size fits standard flat-lapping setups
• Effective on extremely hard materials including carbide, ceramics, and hardened steel

Compatibility

Designed as a PSA-backed alternative to the 661X series diamond lapping film, suited for flat-lapping plates and fixtures requiring a self-adhesive abrasive sheet in 3.0 micron grade.

Installation Notes

Surface finishing with diamond lapping film is typically performed by machinists or precision maintenance technicians. Before applying the PSA sheet, clean and dry the lapping plate surface completely to ensure full adhesion. Peel the liner and press the sheet firmly onto a flat, rigid substrate before beginning the lapping stroke. Replace sheets when abrasive loading or glazing reduces cutting action, as continued use on a spent sheet can compromise finish quality.

Technical Specifications

• Abrasive Grade: 3.0 micron
• Abrasive Type: Diamond
• Backing: Polyester film
• Attachment: Pressure-sensitive adhesive (PSA)
• Sheet Size: 9 inches x 11 inches
• Weight: 0.02 pounds
• Sold As: Each
• Minimum Order Quantity: 10
• UPC: 00051111500606

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044859