WorldWide Drilling Resource

40 MARCH 2018 WorldWide Drilling Resource ® Speed Reducers from Bloom Manufacturing can be used in a wide range of mobile and stationary applications, and anywhere slow speed, high torque, variable speed, or reversing is required. They are available galvanized, as well as in plane- tary or worm gear options; and with capacities up to 54,000 pounds. Some also come with an optional hydraulic brake. Bloom Manufacturing is a Valued WWDR Advertiser Corundum is best known for its gem varieties, ruby and sapphire, which are scientifically the same mineral, but just come in different colors. Rubies are red, and sapphire encompasses all other colors, although the most popular and valued color of sapphire is blue. The names ruby and sapphire are only used to describe the gem variety, otherwise the mineral is simply called corundum. The mineral is widely known for its extreme hardness, which makes it an excellent abrasive. Natural and synthetic corundum are used in a variety of industrial applications because of their toughness, hardness, and chemical stability. The mineral is used to make industrial bearings, scratch-resistant windows for electronic instruments, wafers for circuit boards, sandpaper, and many other products. Cryolite is a colorless to white mineral. It occurs in a large deposit in Ivigtut, Greenland, as well as in small amounts in Spain, and Colorado in the U.S. The mineral is also manufactured synthetically. In the 1890s, cryolite was recognized for its important use in the production of aluminum. This led to heavy mining of the mineral in Greenland throughout the 1900s. In 1987, the cryolite mine in Greenland, operated by the Danish Cryolite Company, was abandoned after 130 years of activity. Cryolite is used in soda and enamel production. It is used as a solvent for bauxite in the electrolytic production of aluminum and has various other metallurgical applications. It also has applications in the glass industry, as a filler in bonded abrasives, in the manufacture of insecticides, and gives fireworks a yellow color. The World of Minerals