Built for Microfinishing
On flat parts, like die castings, and cylindrical or contoured workpieces such as auto parts — consistent and predictable finishes are key. 3M™ Microfinishing Film Disc 472L helps produce fine finishes and achieve close tolerances by way of a durable, uniform film backing and micron-graded mineral. Recommended applications are finishing on metals, plastic, wood and various other substrates.
Smooth, High-Strength Polyester Backing
Compared to conventional cloth and paper backings, the uniform smoothness of film provides a far more consistent substrate for the precise application of resins and micron-graded mineral. The high-strength 5 mil polyester backing won’t yield or deflect when run, which is helpful when close tolerances are important. With a uniform backing the abrasive maintains consistent contact with the workpiece to maintain critical geometries.
Micron-Graded Silicon Carbide Mineral Bonded with Type E Resin
We engineer Microfinishing Film Disc 472L by adhering micron-graded silicon carbide mineral to the film backing with a resin bond. In order to achieve an extremely consistent scratch for microfinishing, we use micron-graded mineral, which is measured at a very tight tolerance for size. The resin bond ensures reliable, durable performance.
Silicon carbide mineral is very hard and fractures easily, resulting in freshly exposed sharp edges that cut extra fast and produce a bright finish. Film Disc 472L is available in a variety of grades, so operators can tailor the grade to their part.
Open coat construction helps prevent loading, which occurs when swarf clogs the surface of the disc and the abrasive and can quickly make the disc ineffective. With the abrasive grains spaced apart in an open coat, such that swarf can exit via the spaces rather than loading the disc. Additionally, the open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade, for faster results.
Get Close to the Close Tolerance
Across industries, from transportation to heavy equipment, from general industrial to aerospace, professionals value part integrity and consistency. Combining the strength of a polyester film backing with the aggressive cutting qualities of micron-graded silicon carbide, 3M™ Microfinishing Film Disc 472L is a good match for workpieces that require precise and uniform cutting action.