3M™ Microfinishing Film Sheet 472L, 40 Mic, Type E, Config

On flat parts, like die castings, and cylindrical or contoured workpieces such as auto parts — consistent and predictable finishes are key. 3M™ Microfinishing Film Sheet 472L helps produce fine finishes and achieve close tolerances by way of a durable, uniform film backing and micron-graded mineral. Recommended applications are microfinishing on metals, plastic wood and various other substrates.

Available in a sheet form, the film may be cut to match the dimensions of a back-up pad or hand pad. This flexibility enables operators to reap the benefits of a microfinishing film and still tackle tough areas that might be inaccessible to other tools and machines.

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 uniform backing the abrasive maintains consistent contact with the workpiece to maintain critical geometries.

Microfinishing Film Sheet 472L is engineered 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, micron-graded mineral is used, which is measured at a very tight tolerance for size. The resin bond helps ensure 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 Sheet 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 sheet and the abrasive and can quickly make the sheet ineffective. With the abrasive grains spaced apart in an open coat that swarf can exit via the spaces rather than loading the sheet. Additionally, the open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade, for faster results.

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 Sheet 472L is a good match for workpieces that require precise and uniform cutting action.

• Micron-graded silicon carbide mineral cuts sharp and fast while producing extremely consistent, fine finishes
• High-strength 5 mil polyester backing won’t yield or deflect when run, contributing to aggressive cut
• May be used on metal, plastic, wood and various other substrates
• Open coat construction reduces loading
• Available in a range of grades