User manual 3M 02-2004 REMOVAL OF MILLING LINES ON SMALL TURBINE BLADES

[. . . ] Application Profile Market: Turbine Blades (Industrial Gas Blades) Application Description: Removal of small milling lines and blending final finish of small (less than 8" long) turbine blades 241321 Key Application Requirements Removal of small milling lines, coarse grade abrasive scratches, and surface imperfections while blending and providing final or intermediate bright finish on small stainless steel industrial gas turbine blades. Used on spindle lathes and bench motors. PRODUCT Scotch-BriteTM SF Finishing and Deburring Wheel Grade 8S FIN 6" x ½" or 8" x ½" Products Replaced Competitive deburring wheels or rubber bonded wheels. Advantages/Benefits To Customer Fast and Consistent A unique resin system allows the SF wheel to contain more mineral than typical deburring wheels, meaning the SF cuts faster and lasts longer. SF wheels can easily remove small milling lines and defects caused from previous milling or abrasive steps. [. . . ] After forging, subsequent processing includes CNC milling which leaves milling lines and metal burrs on the parts. Milling lines are generally less than 0. 010" deep. The surface of the blades are abraded and blended to a uniform finish as preparation before going into vibration media for final finish. Historically, deburring wheels or rubber bonded wheels are used to remove metal scale, milling lines, and minor surface defects while trying to provide the required surface finish. Deburring wheels, which are higher densities, can be difficult to work with. Higher density wheels have a tendency to bounce and chunk, which is tiring for operators to run and can require frequent dressing. Deburring wheels also require metal burrs to act as a mechanism to dress the face of the wheel and expose fresh mineral. Rubber bonded wheels are often not aggressive enough, meaning the process is slower and more tiresome for operators. In addition, rubber bonded wheels do not provide a consistent finish. Scotch-Brite SF Wheel will quickly remove small milling lines and surface defects and blend the surface of the blade to provide a burr-free, consistent bright finish. SF wheels resist smearing, provide long wheel life even in the presence of burrs and are user-friendly for operators. Recommended Speeds Maximum Operating Speeds: 6" Diameter: 6, 000 RPM 8" Diameter: 4, 500 RPM 12" Diameter: 3, 000 RPM Related Products For larger turbine blades: 3MTM TrizactTM CF Belts For deeper milling lines and areas you cannot belt: Scotch-BriteTM EX3 Wheels and 3MTM XR Wheels Related Applications "Turbine Blades (Aerospace and Industrial Gas) ­ Removing casting scale, milling lines and minor defects using a backstand. " Market: Turbine Blades (Industrial Gas Blades) Application Description: Removal of small milling lines and blending final finish of small (less than 8" long) turbine blades page 3 Safety Information Always read and follow all safety information included with the product. Do not exceed maximum operating RPM's. Follow safety operation procedures posted in work areas. To request additional product information or to arrange for sales assistance, call 1-800-362-3550. [. . . ] User is responsible for determining whether the 3M product is fit for a particular purpose and suitable for user's application. If the 3M product is defective within the warranty period, your exclusive remedy and 3M's and seller's sole obligation will be, at 3M's option, to replace the product or refund the purchase price. Except where prohibited by law, 3M and seller will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental, or consequential, regardless of the legal theory asserted, including warranty, contract, negligence, or strict liability. For Additional Information Product Use Warranty and Limited Remedy Limitation of Liability Trizact and Scotch-Brite are trademarks of 3M. Industrial Business Building 21-1W-10, 900 Bush Avenue St. [. . . ]