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Bronze and Copper-Alloy Bearings
Dozens of copper alloys are available as bearing materials. Most of these can be grouped into five classes: copper lead, copper tin (sometimes called tin bronze), leaded bronze, aluminum bronze, and beryllium copper. As a general rule in these alloys, a higher lead content promotes compatibility
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Aluminum-Alloy Bearings
is B850.0-T5. Its properties are similar to those of general-purpose bronze. Alloy B850.0-T5 is the strongest of the aluminum alloys and can be used with moderate shock loads. But being harder, it does not conform to minor misalignments as readily as A850.0. The most common steel-backed alloys are SAE 780
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Direct-bond bearings challenge inserts
plunger; eliminates bronze sleeve. Powder. metal. Inside diameter; 22-mm bore. 45-50. Rod guide; eliminates inserted bushing. Steel,. postplated. Inside diameter; 28-mm bore. 30-35. Valve body; eliminates inserted bushing. Powder metal,. steam-oxide. treated. Outside diameter; 38-mm OD. 30-35. Shock
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Bearing up under 300 tons
replacement parts made from aluminum bronze and ToughMet 3 CX105, engineers built a test rig that replicated one side of the front suspension to simulate field conditions. Tests showed that the ToughMet had one-third the wear rate of aluminum bronze, which equates directly to a threefold increase
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Zinc
with good bearing properties, and wear resistance often superior to standard bronze alloys. ZA castings are now competing with cast iron, bronze, and aluminum because of various property and processing advantages. Of the three alloys, ZA-12 is preferred for most applications, and particularly
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Exclusion Seals
adhering tightly to the shaft. It must be resistant to corrosion, have low friction against the shaft material, and little tendency to score the shaft. Good spring characteristics are needed for conical scrapers. Metals such as copper-silicon, aluminum, manganese bronze, beryllium-copper, and brass
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Teaching new components old tricks
downtime. The SPS slide has an aluminum-bronze alloy construction with a heavy cross section that is said to offer superior loadbearing capabilities throughout the stroke compared with roller slides. The pneumatically powered units are available with strokes ranging from 0.5 to 2 in. and provide
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Straight Facts on Blind Rivets
things together since the Bronze Age, but it usually took two workers to set them: one with a hammer to pound the rivet through the hole, the other with a bucking bar to set it on the opposite side. Then, in the mid-1930s, engineers developed blind or breakstem rivets. They let workers install