Bearings • Bushings
A common type of plain bearing, a bushing is typically inserted into a housing to provide a bearing surface for rotary applications. Industrial-style bushings are common within oil field applications, and manufacturing and metal fabricating operations. Bushings are also used in computer, consumer electronics, aerospace, and medical applications. Common bushing designs include solid, (sleeve and flanged), split, and clenched. Solid sleeved bushings are a solid all the way around, while split bushings have a cut along the length of the bushing. Clenched bearings are similar to split bushings, but feature a clench between the halves. Flanged bushings are a sleeve bushing with a flange extending radially outward. Linear bushings are secured with two retaining rings and not pressed into a housing.
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American Sleeve Bearing is a manufacturer of self-lubricating, standard metric, steel-backed PTFE-lined, plastic PTFE, oil-less, rolled, and graphited and grooved cast-iron bushings. The company's rolled bushings are available as bronze, indent, perforated, graphited, bi-metal, steel-backed, and bronze-lined types.
RBC offers unlined bushings, Mil-Spec standard lined journal bearings, and other similar products for the aerospace industry. These products come plain or flanged. Typical materials used are 17-4PH and aluminum, and can also be cadmium or zinc nickel-plated as required.
Spirol International manufactures Dowel bushings which have a hollow design. This configuration permits a fastening screw or bolt to pass through the inside diameter, thereby eliminating the need to drill a separate hole. The Dowel bushings are made of carbon steel with a hardness of HV 420-545, and can be finished as plain/oiled, zinc plated, or phosphated/oiled.
Spadone-Alfa offers plain bronze bushings, self-lubricated bronze bushings, graphite plugged bushings, and carbon/graphite bushing inserts. The bronze bushings are offered in a wide variety of copper alloys, such as Aluminum (CDA 954), Manganese (CDA 863), and Bearing Bronze (CDA 932), in over 900 sizes. The self-lubricated option comes as MET 70, an oil-free, self-lubricating insert that fits Spadone-Alfa's 200 Series Pillow Blocks and Flange Units. These inserts are made of carbon/graphite material and are available in two temperature ranges: up to 500 degrees Fahrenheit, and up to 1100 degrees Fahrenheit.