3M RADIAL BRUSH BRISTLE DISCS 3" Diameter 7 Different Grades – 6 PLY’s WITH PLASTIC HUBCHOOSE from the 7 GRADES OF DISCS - ALL COME WITH PLASTIC TAPERED HUBS This is an assortment of the 7 Grades of the unique 3M Radial Bristle Discs a new type of abrasive that is superior to sandpaper, flap wheels, or other types of sanders, brushes, or abrasive wheels. The 3M Cubitron and aluminum oxide grains embedded throughout the plastic bristles make them very long lasting.These 3” Bristle Discs can be used like natural bristle brushes, without any compounds - which is already impregnated in the disc material. The different colors of discs designate the grade. Their flexible bristles can reach into areas with detail and irregular, curved, or flat surfaces.Bristle Discs come mounted with a Right Hand Plastic Hub... The bristle discs are very flexible, cool running, long lasting and provide a uniform finish.APPLICATIONS: Woodworking - Woodcarvers will appreciate how well they remove the "fuzzies" without harming any of the underlying detail. Dental Laboratory - Dental lab technicians can use these discs for cleaning, pre-polishing, and polishing of metals and acrylics with excellent results. Jewelry & Crafts - Jewelers and Metalsmiths use the various grits of these discs, for cleaning, pre-polishing, metal surface Satin Texture finish and polishing of precious metals. Die & Mold Shops - Metal working when cleaning parts and molds, especially good on hard to polish materials like titanium and valplast. . - Coarser grits can be used to clean and remove surface oxides, in carving and grinding, surface texture while finer grits will smooth, burnish and polish.- The 3M Cubitron and Aluminum Oxide grains embedded throughout the plastic bristles make them very long lasting.. Specifications: - Bristle Grades: - Yellow 80 - White 120 - Red 220 - Blue 400 - Pink Pumice - Peach 6 Micron - Lt Green 1 Micron Instructions: · Recommended speed from 5,000 to 15,000 RPM. · Maximum Operating Speed of 35,000 RPM· Rotation must be with the Radius of Bristles· No compounds, rouges or pastes required -Bristles contain abrasives. Application Recommended Grit / Grade RPMHeavy Cleaning 80 15,000 to 20,000 RPM Fire-scale Removal 80,120 15,000 to 20,000 RPMLight Oxide Removal 120, 220, 400 10,000 to 15,000 RPMPre-Polishing 220, 400, Pumice 12,000 to 18,000 RPMSemi-Finishing 400, Pumice 5,000 to 10,000 RPMBlending 220, 400, Pumice 8,000 to 15,000 RPMTexturing 80, 120, 220 5,000 to 10,000 RPMPolishing 1 micron, 6 micron 15,000 to 20,000 RPMNOTE: Visit JETS INC ebay Store Listings, where you can see various 3M products, Radial Discs in various Grades and Sizes, Spindles, Arbors, Miniature Mandrels and Holders and a selection of many more Jewelers Equipment Tools and Supplies. JETS Inc.CKSP 318 M