A brush cutter gear box, also known as a gear head or gear case, is a crucial component located at the end of the shaft. Its primary function is to transfer the rotational power from the engine through the drive shaft to the cutting attachment, such as a blade or a trimmer head.
The gear box uses a set of bevel gears to change the direction of the rotation by 90 degrees, allowing the blade to spin horizontally while the drive shaft runs vertically. Built to withstand high-speed rotation and the impact of cutting through tough vegetation, it is made from durable materials like aluminum and hardened steel.