Centrifugal Casting Pintle Bushings – Superior Durability for Heavy Load Conditions

A pintle bushing is a critical component used in machinery where rotation, friction reduction, and precise alignment are necessary. These bushings are typically designed to act as bearings, providing a smooth interface between moving parts, such as a pintle (a pin or bolt used to attach or pivot mechanical components). Pintle bushings made through centrifugal casting are preferred in industries requiring durable and reliable performance under heavy load conditions.

Centrifugal casting is a process in which molten metal is poured into a rotating mold, creating a dense, homogeneous material with minimal porosity. This method ensures that the outer surfaces of the bushing, which experience the most wear, are composed of the strongest and most uniform material, while impurities or lighter elements are pushed toward the interior of the casting. The centrifugal force during the casting process results in high material integrity, making it ideal for producing pintle bushings, which often face high pressures and need to withstand substantial mechanical stress.

In terms of material, pintle bushings are commonly made from bronze alloys, including leaded bronze, for their excellent combination of wear resistance, machinability, and strength. Leaded bronze, for example, offers improved machinability and a self-lubricating property, which reduces friction and wear during operation. These bushings can be used in a variety of applications, including in heavy equipment, bridges and lock and dam.

Pintle bushings undergo further machining and finishing operations, such as honing and precision boring, to meet exact tolerances and surface finish requirements for smooth and efficient operation in their respective applications.

For help with a component part project, please access our Request a Quote Form or call 262-377-9440

Posted by Jim Hatt
Vice President of Sales & Marketing
Johnson Centrifugal Technology
jhatt@jct-usa.com