3M 7100189485 Microfinishing Film Disc 675L 3 Inch Diamond

Product Description

The 3M 7100189485 is a 3-inch diameter microfinishing film disc from the 675L series, designed for precision surface finishing on hard and difficult-to-machine materials. Built on a strong polyester film backing, the disc uses micron-graded diamond mineral to deliver close-tolerance finishes with consistent, repeatable results. It is suited for medium stock removal applications where tight surface-finish requirements must be met. Machinists, tool and die makers, and precision grinding technicians are the primary users of this abrasive product.

The 675L disc is used on hard metals, thermal spray coatings, ceramics, carbides, chilled iron, and granite. It performs in both wet and dry operating conditions, giving operators flexibility depending on the workpiece material and machining setup. The disc is color-coded by grade, which reduces the risk of selecting the wrong abrasive during multi-step finishing operations. It is available in a range of micron grades to support progressive material removal sequences.

Key Features

• Micron-graded diamond mineral for close-tolerance precision finishes
• Polyester film backing provides dimensional stability during use
• Suitable for medium stock removal on hard and abrasion-resistant materials
• Runs wet or dry for application flexibility
• Color-coded by grade to reduce operator error in multi-step processes
• 3-inch diameter disc format for use with compatible backing plates and holders

Compatibility

Designed for use on hard metals, thermal spray coatings, ceramics, carbides, chilled iron, and granite surfaces requiring precision microfinishing. Compatible with 3-inch disc holders and backing plates used in precision grinding and lapping operations.

Installation Notes

This disc is installed by a machinist or precision grinding technician using a compatible 3-inch backing plate or disc holder. Ensure the backing plate surface is clean and free of debris before mounting the disc to maintain flat, even contact with the workpiece. When running wet, verify that the coolant or lubricant used is compatible with the workpiece material and disc construction. Inspect the disc before each use and replace if mineral loading, glazing, or backing damage is observed.