Carbon-Graphite Bushings and Bearings

Carbon-graphite is an ideal material for bearing applications. Carbon-graphite bearings are chemically inert, self lubricating, and dimensionally stable. Typically, carbon-graphite bearings are used where contamination by oil and grease is prohibited, in handling corrosive liquids, in high temperature operation, in bearings not accessible for ordinary lubrication. Bearings made from materials can be used in a wide range of operating temperatures and in highly corrosive and abrasive environments. They can be specified for inaccessible locations. They are well suited for applications in chemical, pharmaceutical, and food processing industries, and in liquid, gas or vacuum environments. Offers the designer a family of customized proprietary sliding bearings and bushings developed to perform in nearly every difficult bearing situation. These bearings are used in devices operating far beneath the earth's surface and in the far reaches of outer space where conventional bearings fail. Bearings are used in both wet and dry operating conditions. Carbon-graphite allows the designer to specify the bearing close to the boundary lubricated condition without risk of seizure. In dry operation, carbon-graphite with a resin impregnant provides strength and self-lubrication. Special impregnations have been developed by to extend the life of bearings made from carbon materials at both low and high temperatures. At extremely high temperatures, the impregnants reduce oxidation rates without adversely affecting the natural, non-galling properties of carbon. Many carbon grades increase in strength as temperatures rise. They also have higher strength to weight ratios than most metals. For cryogenic and vacuum applications, other additives enhance the natural lubricity of carbon by providing a mechanism for controlling film formation. Carbon materials can be loaded to levels at least as high as their nominal compressive strength. They do not cold flow, creep or take a permanent set at high temperatures as do most plastics and metals. Carbon-graphite grades may be impregnated with resin or metals such as; antimony, Babbitt, copper, copper-lead are available when higher strength and improved thermal conductivity are required. Permissible loads and running speeds depend on the allowable wear rate. Shaft materials and surface finishes are important factors on the wear rates of all bearings. The harder and more polished the surface, the lower the wear. Use of oil or grease with carbon bearings is not recommended. Where possible, aluminum and bronze should be avoided for use as shaft materials. Carbon-graphite is inert to most chemical reagents where other engineered materials fail. Bearing wear is a result of adhesive wear, chemical wear, erosive wear, and sometimes radioactive wear. Grades show superior adhesive wear resistance; however, chemical wear is evidenced in certain strong oxidizing environments or where the additives are attacked by specific oxidizing reagents. Grades exhibit the best wear resistance to strong oxidizing fluids as shown in several field history cases and laboratory analyses.

We are able to provide you all the carbon graphite Bearings that you need in any shapes to use in different conditions and environment, just CONTACT US  and send your samples and the drawing of bearings that you have, and we will be happy to quote it for you with no obligations.