What is ring gear for flywheel?

A ring gear is a type of gear that is mounted on the flywheel of an engine or other rotating device. It is called a ring gear because it is circular in shape and has teeth around the outer edge. The teeth on the ring gear mesh with those on the starter motor's pinion gear when the engine is started, allowing the starter motor to turn the engine over.

Ring gears are typically made of steel or other high-strength materials that can withstand the stresses of starting an engine. They are often heat-treated or hardened to increase their strength and durability. The number of teeth on a ring gear varies depending on the size and type of engine it is used with.

The ring gear is an essential component of the starting system in many vehicles, particularly those with manual transmissions. If the teeth on the ring gear become damaged or worn, the starter motor may not be able to engage properly, causing the engine to fail to start. In such cases, the ring gear will need to be replaced to restore proper function to the starter system.