User manual 3M CUBITRON ABRASIVE GRAIN

[. . . ] 3M Cubitron Abrasive Grain TM TM Microstructures maximize mineral performance Tough. Self-sharpening. Crystals Improve Wear Rates Unlike conventional abrasives, such as aluminum oxide and alumina zirconia, Cubitron grain has a crystalline structure that wears away in smaller "chunks". [. . . ] So to stand up to high pressure grinding forces, a grain needs a high degree of fracture toughness (also known as critical stress intensity factor). Other benefits include: · Durability · Hard · Self-sharpening · High Cut Rates · Cool Running · Consistent Quality Hardness/Toughness for Various Mineral Types High Fused Alumina 324 321 AZ Low Low High Chemical and Physical Properties 3M Cubitron Grain 321 has a complex, polycrystalline microstructure composed of crystallites of alpha alumina, magnesium alumina spinel and a rare earth hexagonal aluminate. Typical Chemical Properties: Al203 MgO Y203 La203 + Nd203 Fractured 321 Grain 94­96% 0. 9 ­ 1. 5% 0. 9 ­ 1. 5% 1. 9 ­ 2. 9% Traces of: Ti02, Si02, CaO, CoO and Fe 3MTM CubitronTM Abrasive Grain 324 More Friable Grain for Resin Bonds Cubitron Grain 324 fractures and self-sharpens at lower forces making it ideally suited for resin bonded abrasives. Twenty five percent more friability than 321, Cubitron Grain 324 is more compatible with resin bonds and their grinding applications, such as roll grinding, centerless grinding and cut-off wheels. The mineral breaks down under lower pressure grinding rather than breaking out of the resin bond. It may even be a suitable alternative in vitrified bonds where 321 is too tough. In appropriate applications, Cubitron Grain 324 offers: · Improved "Grinding Ratio" · Lower power consumption · Good surface finish · High cut rates · Self-sharpening · Cool running · Consistent Quality CubitronTM Abrasive Grain 324 -- 2 Phase Microstructure Comparative Friability between Cubitron 324 and Cubitron 321 50 Friability Index 45 40 35 30 Cubitron 324 Cubitron 321 Modified Chemistry, Similar Structure Cubitron Abrasive Grain 324 has a complex polycrystalline microstructure composed of crystallites of alpha alumina, yttrium aluminum garnet and a rare earth hexagonal aluminates. Like 3M Cubitron Abrasive Grain 321, the 324 grain is tough, hard and self-sharpening, thanks to its two-phase microstructure. Its modified chemical composition provides its unique performance characteristics: Typical Chemical Properties: Al203 MgO Y203 La203 + Nd203 92. 3 ­ 95. 6% . 075% ­ 1. 25% . 075% ­ 1. 5% 3. 0% ­ 5. 0% Traces of: Ti02, Si02, CoO Traces of Iron may be found on the surfaces of some abrasive grains Technical Expertise 3M makes available a combination of experts and equipment to help customers achieve optimum grinding wheel performance. Mechanical properties, physical measurements, chemical and structural integrity and more can be analyzed through the use of: Electron Microscopy Analyze chemistry interaction between mineral and bond Optical Microscopy Size, shape and distribution-- abrasive grains and fillers porosity in wheel X-Ray Analysis Chemical Analysis When you see the 3MTM CubitronTM Abrasive Grain logo on an abrasive product, you can know it means the best in high performance abrasives known for their long-life, fast cuts and quality finishes. At 3M we know your applications require unique solutions so we have made a family of Cubitron grains to meet the diverse needs of our customers and optimize the performance of their abrasive products. When productivity matters, look for the Cubitron abrasive grain logo as your assurance of long-lasting, top quality performance. IMPORTANT NOTICE TO PURCHASER PRODUCT USE: All statements, technical information and recommendations contained in this document are based upon tests or experience that 3M believes are reliable. [. . . ] LIMITATION OF LIABILITY: 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. Industrial Business Customer Response Center 900 Bush Avenue, Building 21-1W-10 St. Paul, MN 55106 3M and Cubitron are trademarks of 3M. Minimum 10% Post-consumer Fiber Printed in U. S. A. [. . . ]