Journal bearings are nothing more than a journal rotating in a bearing. A journal is essentially a shaft. The shaft rotates in the bearing with a layer of lubricant that separates the two parts. Lubricant used in journal bearings prevents metal-to-metal contact and is also used for a dampening effect which makes the engines and motors run smoothly and quietly. Journal bearings are often used when the load is light and the motion is continuous because journal bearings are designed to reduce load friction. Journal bearings are made out of hardened steel like Babbitt or made from cast iron. Journal bearings are used mostly in industrial machines that require high horsepower and high loads like pumps and turbines. Journal bearings are durable and long lasting with proper lubrication and preventative maintenance.
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