A Groove Friction Disc with an internal spline that fits onto the sun gear of a planetary transmission. The disc has a series of grooves on its outer surface that mate with the planetary gears. The disc is made of a durable material that can withstand the high temperatures and pressures of the transmission.Attributes:• Helps to smooth out the power delivery, reducing vibration and noise• Manufactured to precise specifications and is built for durability and reliabilityApplications:A Groove Friction Disc is used to transmit power from the sun gear to the ring gear in the planetary transmission.