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  • Great balls of ceramic
    with typical raceway steels which have a 1 to 2 micron finish. Ceramic balls also weigh less than steel balls, which cuts centrifugal force and therefore raceway normal loads and related friction. And less friction generates less heat, boosts operating speeds, and extends bearing life. Moreover
  • Great balls of ceramic
    balls from Saint-Gobain, East Granby, Conn., have a <0.004-micron surface finish, four times smoother than steel balls used in most machine-tool bearings. Cerbec balls are said to lower internal friction by up to 25% when mated with typical raceway steels which have a 1 to 2 micron finish. Ceramic
  • MD's 75th Anniversary - Changes in engineering
    , their primary job description, has gotten much larger. My father, for example, was a mechanical engineer. He had a small list of all the materials he could use. It had properties for several different steels, some bronzes, and a few dozen other metals. Now we have designer materials and you can specify
  • Medical Device Link . Superelastic Nitinol for Medical Devices
    Superelastic nickel-titanium (Ni-Ti), or nitinol, alloys are becoming integral to the design of a variety of new medical products. The enormous elasticity of these alloys is the most dramatic advantage afforded by this material, but by no means the only or most important one. Also discussed
  • Cool running
    , run at temperatures between 90 to 100 F. The bearings incorporate ceramic (silicon-nitride) taperedrolling elements in a precision-class bearing. Ceramic has a modulus of elasticity 50% greater than steel, which boosts bearing rigidity. The material also has a
  • Medical Device Link . Spotlight on IV Components
    shapes. The spiral design flexes to fill uneven joint surfaces and has no pieces that could break off and short out equipment. Standard materials are stainless steel and beryllium copper, and tin plating is available for better conductivity or corrosion resistance. Cross-sectional diameters range
  • Fibers
    the strength-to-weight ratio of base materials such as titanium and aluminum. Anisotropic properties can be designed into a part made from a fiber composite by selectively aligning the fiber/base layup. Fibers of stainless steel or aluminum provide conductivity in plastic components for static-electricity
  • Nickel
    Structural applications that require specific corrosion resistance or elevated temperature strength receive the necessary properties from nickel and its alloys. Some nickel alloys are among the toughest structural materials known. When compared to steel, other nickel alloys have ultrahigh strength

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