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Zinc
Zinc, a crystalline metal with moderate strength and ductility, is seldom used alone except as a coating. In addition to its metal and alloy forms, zinc also extends the life of other materials such as steel (by hot dipping or electrogalvanizing), rubber and plastics (as an aging inhibitor
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Bronze and Copper-Alloy Bearings
to copper to tailor an alloy for user requirements based on load capacity, bearing strength, hardness, wear resistance, and fatigue strength. Compared with the softer babbitts, copper-alloy bearings provide greater load capacity, better high-temperature operation, greater wear resistance, but poorer
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Alloy coating extends bearing life in harsh environments
A thin zinc-alloy coating that can be applied to production bearings lets them tolerate wet environments and extend bearing life. The coating, called AquaSpexx, is a product specification engineered to increase performance of Timken bearings in applications subject to water-based corrosion damage
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Know your thrust bearings
ASTM B23, Alloy 15: 83% lead, 15% antimony, 1% arsenic, 1% tin) costs less than tin babbitt. Use well-inhibited lubricating oil to avoid corrosion by oxidized oil, especially with water contamination. Leaded bronzes (83% copper, 7% tin, 7% lead, 3% zinc) are in many small and low-speed machines
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Bearing up under 300 tons
: The main function of tin (Sn) is to make alloys stronger. Zinc (Zn) also boosts alloy strength with better economics. However, at about 4% Zn the alloy starts to loose antifrictional properties. Tin bronze alloys must be relatively hard so they don't conform well to rough or misaligned shafts
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Faster, more predictable die casting
it a shoe-in for bearing applications. But Zamak 2, with a hardness of 100 Bhn and high lubricity, can also be considered for bearings. Magnesium alloy is at the low end of the spectrum with a hardness up to 63 Bhn. The natural thermal conductivity of both magnesium and zinc alloys lets them remove
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Where die casting makes "cents"
thread, helical gear, internal bearing journal, and two thrust faces -- into a single part. Zinc alloy also provides strength and dimensional stability. Moreover, die-casting production costs were 40% below those for machined steel. Tooling to form the Acme-screw thread cavity incorporated four side
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Metal Coatings
on the smooth side. They are thermally treated to provide a uniform, spangle-free, paintable, weldable, zinc-iron alloy coating. Because the zinc-iron crystals on the coated side are very fine, the sheet can be formed or rolled with no "print-through" in the top surface. Another improved zinc-coated steel