A line of Type 27 flexible mesh abrasive wheels that come in several grades for grinding, sanding, and preparing the surfaces of composite wind turbine blades, fiberglass boat hulls, and related products for coating is avail-able from Rex-Cut Products, Inc. of Fall River, Massachusetts.
Rex-Cut® Sigma Screen™ Multi-Purpose Discs feature a blend of zirconia-ceramic abrasive grains bonded to a flexible mesh depressed center Type 27 wheel and come in coarse, medium, fine, and very-fine grades. Faster and cooler than solid resin fiber discs when grinding and finishing composites or fiberglass, they are chatter-free and clog-resistant, claims the firm.
Measuring 4-1/2" dia. x 7/8", Rex-Cut® Sigma Screen™ Multi-Purpose Discs come with back-up pads and they can be stacked on the grinder for longer life. Also effective for stainless steel, metals, aluminum, and wood, these discs are available in a test kit featuring two-each of coarse, medium, fine, and very-fine grades for easy user evalutation.
Rex-Cut® Sigma Screen™ Multi-Purpose Discs are $1.99 (list) ea., supplied in boxes of 10 and 50 discs; with quantity discounts available. The test kit sells for $21.23 (list).