polyurethane sun wheel

 Sun wheel, also known as a sun wheel or sun gear, is a central gear in a planetary gear system. It is typically located in the center of the system and rotates around the planetary gears. The sun wheel provides the input power to the system, which is then transferred to the planetary gears and the ring gear. The size of the sun wheel can affect the speed and torque of the planetary gear system. Sun gears are commonly used in automotive transmissions, where they allow for different gear ratios and efficient power transfer.