3M Aluminum Oxide Films for Sharpening

Precisely graded for size and densely applied in a closed coat, the aluminum oxide abrasive in this film is highly fracture resistant. These characteristics result in a medium that is quick cutting and long lasting, and produces an exceptionally consistent scratch pattern. In our testing, the film was comparable in cutting speed to silicon carbide in O1 steel, but about 40% faster in A2; in both alloys, it maintained its cutting speed appreciably longer. All grits have a 3-mil polyester sheet that resists tearing and is PSA-backed for mounting on flat or contoured surfaces to create specialized hones in a range of shapes and sizes. Since the 8 1/2" × 11" film is much more portable than a full-size stone, it is an excellent addition to a travelling toolkit. It can be used with water, but we have found a light oil is best for carrying away the swarf.