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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
  • Aluminum-Alloy Bearings
    is the most ductile of the cast alloys and can withstand heavy loads without cracking or fretting. It also has good compatibility. An easier-casting version is A850.0-T5. In hardness, this alloy stands between the bronzes and the babbitts. The most widely used cast aluminum-tin bearing alloy
  • 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
  • Bearing up under 300 tons
    Spinodal bronze alloys help ensure lubricantstarved bearings keep mining equipment rolling under extreme loads and in corrosive environments. To solve a recurring problem with steel-sleeve bushings on a continuous mining machine, Joy Mining Machinery, Warrendale, Pa., switched the bushing material
  • Zinc
    ), and wood (in paints). Zinc is also used to make brass, bronze, and die-casting alloys in plate, strip, and coil; foundry alloys; superplastic zinc; and activators and stabilizers for plastics. Zinc-casting alloys can be grouped into two general categories: standard zinc die-casting alloys, and the newer
  • Cost-conscious molding
    a permanent graphite mold to rapidly produce 300 to 20,000 parts. The parts are from ZA-12, a zincaluminum alloy (approximately 11% aluminum) that's harder, stronger, and more durable than brass, bronze, plastic, or aluminum alone. A knowledgeable casting house can use this molding technique to go
  • Grease be gone
    /alloy bushings let telescopic coil grabs from Avon Engineering Ltd., Waterdown, Ont., operate lube-free in a harsh environment. The coil grabs transport hot steel coils from the mill to a quenching pond at California Steel Industries, Fontana. Avon engineers typically spec aluminum bronze or 660
  • Applications
    Fasteners smaller than 3/32 in. in diameter and bolts or unthreaded pins up to 1 1/4 in. in diameter can be successfully welded. Fastener lengths vary from 1/4 to 40 in., depending upon end use. Fasteners may be made of mild steel, stainless steel, alloy steel, aluminum, brass, bronze, or magnesium

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