Where are lubrication pathways or grooves typically found in friction bearings?

Lubrication pathways or grooves in friction bearings are typically found in the unloaded area of the bearing. This design helps facilitate the movement of lubricant, allowing it to flow to the contact surfaces where it is most needed to reduce friction and wear. In most bearing applications, the loaded area experiences higher pressures and is in continuous contact, making it crucial to ensure that sufficient lubrication reaches these areas without obstruction.

Placing the lubrication grooves in the unloaded area ensures that as the bearing operates, the lubricant can be drawn into the loaded zone, maintaining a film of lubricant that protects the surfaces from direct metal-to-metal contact. This strategic location helps enhance the overall performance and longevity of the bearing by ensuring optimal lubrication throughout its operation.