Bearings are what enable the gears to rotate smoothly. They are typically produced out of bronze or brass, they usually suit into races (or grooves) in the gearbox housing. Fundamentally it includes a metallic plate with mesh-kind inserts that avoid contaminants from entering the transmission and triggering wear and tear. https://filter-gearbox88766.blog-kids.com/34307035/the-filter-gearbox-diaries