This is an optional KDE Direct T700 Main Gear Case, and is intended for use with the Align T-Rex 550 and 600 electric helicopters. The T700N Main Gear Case for the ALIGN TREX 550E/600E/600ESP electric series uses the stock ALIGN TREX 700 Main Gear (HN7019-1, must be purchased separately), which gives tremendous benefits to the 550/600 designs, including: increased head speed (164T versus 170T), increased gear teeth engagement, and significantly increased strength due to the taller gear and higher contact surfaces. This upgrade is a MUST HAVE for high-power, high-voltage setups to help prevent stripping of the main gear during flight and hard 3D maneuvers. Please review the installation diagram for critical information on proper press-fit installation and positioning of the one-way clutch bearing for optimal gear alignment.
NOTE: The T700 Main Gear Case can be used in conjunction with the new TREX 700 Series Main Drive Gear, 115T, MOD1.0 or the ALIGN TREX 700 Main Gear, MOD1.0 (HN7019A, must be purchased separately) for even further strength advantages and alternate gearing ratios.