3M 7000008839 Diamond Lapping Film Disc 8 Inch

Product Description

The 3M 7000008839 is a diamond lapping film disc used for precision surface finishing of extremely hard materials. Precisely graded diamond particles are coated onto a polyester film backing, producing a consistent and repeatable finish across applications where standard abrasives cannot achieve the required surface quality. At 8 inches in diameter, this disc suits bench lapping and machine lapping setups. It is available in grades ranging from 0.10 to 30.0 micron, making it adaptable across rough stock removal and fine finishing stages.

This disc is used in precision grinding and lapping operations where tight surface tolerances and sharp, flat edges are required. Common applications include finishing ceramics, carbide, optical components, fiber optic connectors, and other hard substrates. It is suited for production environments where throughput and finish consistency must be maintained across multiple workpieces. Technicians and machinists working with hard-to-finish materials select this film for its fast cut rate and uniform output.

Key Features

• Precisely graded diamond particles coated on polyester film for repeatable, uniform finish
• Fast cut rate increases throughput on hard materials
• Produces flatter surfaces and sharper edges compared to conventional abrasives
• Available in multiple grades from 0.10 to 30.0 micron
• Also available in sheet and roll formats for different equipment configurations

Compatibility

Designed for use on bench lapping machines and rotary lapping equipment that accept 8-inch diameter discs. Suited for finishing ceramics, carbide, glass, and other extremely hard materials requiring controlled surface finish.

Installation Notes

This disc is installed by qualified machinists or precision finishing technicians on compatible lapping machines. Secure the disc to the platen per equipment manufacturer instructions before beginning any lapping operation. Inspect the disc for tears or uneven coating before each use. Do not exceed the speed rating of the lapping machine or apply excessive downward pressure, as this can cause uneven wear of the diamond coating.

Technical Specifications

• Diameter: 8 inches
• Abrasive Type: Diamond
• Backing Material: Polyester film
• Grade Range: 0.10 to 30.0 micron
• Weight: 0.02 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 25
• UPC: 00051138719203

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000008839