Slant Thread Main Drive Gear/121T H45156QA

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●Use for T-REX 450 Series.

●Must with::H45157 Motor Pinion Helical Gear 12T.

●New style high strength 121 tooth Mod 0.6 helical main hear for 450 size helis. The increase gear pitch can withstand higher power, at the same time minimize operational noise. A great upgrade to withstand the modern high power system.

●Utilizes high strength polymer plastic with excellent rigidity and flexibility characteristics.

●Patented unique built in fan design to create induced air flow, effectively cooling electronics and motor.

●Gear ratio 1:10.08.

●CNC M0.6 Slant Thread Main drive gear(121T) x 3