Excavator Sun Gear 099-4746 Fit Caterpillar E110B E120B

Product Name: Gear Sun Reference Part Number: 099-4746, 0994746 Compatible Machine: Caterpillar Excavator E110B E120B… Description: A Swing Drive Sun Gear is a central gear within the planetary gear set of a machine’s swing drive system. It’s the primary driving gear that receives rotational force from the hydraulic motor. The sun gear has fewer teeth compared to the surrounding planetary gears, which mesh with it. This gear ratio configuration allows the swing drive to convert the high-pressure, high-flow hydraulic power into a lower-speed, high-torque output for rotating the machine’s upper body with precision control.Attributes: • Made from steel with properties that maintain hardness for long wear life • Manufactured to precise specifications and is built for durability and reliabilityApplications: A Swing Drive Sun Gear works in conjunction with other gears, such as planetary gears, within the swing drive assembly to transfer torque from the hydraulic motor to the swing mechanism.