Self-Lubrication Options for Bronze Bearings


Bronze bearings that are self-lubricated can come in many different forms.  Each with its distinct advantages and disadvantages.  This article will outline some of the more popular methods of self-lubrication used in bronze based bearing products.

Self-lubricated bronze bearings are bearings that are manufactured with some form of pre lubrication feature, engineered to provide continuous lubrication throughout the life of the bearing.  This pre lubrication eliminates the need for any further additional lubrication.

oil impregnated bushing

Some of the earliest self-lubricated bronze bearings were developed by Chrysler.  These bushings were sintered metal bushings impregnated with oil and manufactured via the powdered metallurgy process.  One of the added benefits of this style of product is the lower cost of production when manufacturing in large quantities that is associated with the powdered metal process.  To learn more about oil impregnated bronze bearings follow this link:

Oil Impregnated Bronze Bearings


graphite plugged bronze

An additional method of self-lubrication is via the use of solid lubricant plugs.  More specifically a graphite or graphite like plug.  Self-lubricating graphite plugged bronze bearings are machined from cast bronze material.  The bearing is then milled with multiple holes, which are then plugged with a solid graphite plug.  The graphite acts as a coating on both the mating shaft and bearings surface.  This thin, slippery coating serves as the bearings lubrication.  The plugs are inserted into the bearing itself, giving these bushings continuous self-lubricating properties.  These types of self-lubricating bronze bearings perform well in high temperature applications as well as applications in locations that are difficult to service.  More information on graphite plugged bronze bearings can be found at this link:

Graphite Plugged Bronze Bearings


These are two of the most popular methods used to add the self-lubricating properties to bronze bearings.  Here at National Bronze Mfg. Co. we offer both oil impregnated and graphite plugged bronze bearings as part of our diverse product line.  For more information on self-lubricating bronze bearings from National Bronze Mfg. Co., contact us via the methods below:

800-875-3558 (Toll Free) (email)

Request a Quotation Form (online)

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