Bearings are what enable the gears to rotate effortlessly. They are typically designed outside of bronze or brass, plus they match into races (or grooves) in the gearbox housing. Fundamentally it is made up of a metallic plate with mesh-style inserts that protect against contaminants from getting into the transmission https://filtergearbox87429.blogpayz.com/34169970/the-smart-trick-of-filter-gearbox-that-no-one-is-discussing