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New version with 4mm output shaft. Fits all 20 mm Brushless motors with 2mm shaft. Built-in cooling fins for cooler motors. 10mm x 10mm mounting box fits most planes designed with GWS gearboxes and any 10mm (3/8") square sticks. Comes with complete gear set assortment including 6.6:1, 5.3:1 & 4.4:1. All included pinions are for motors with 2mm shafts. Dual ball bearings and hardened shaft.
Direct replacement for GWS gearboxes ACC4966 fits all 20 mm BL motors with 2mm shaft;
ACC3937 fits all 24mm motor, 370 type motors with 2 mm shaft;
Aluminum gear housing - no more broken gear housing
Built-in cooling fins - no more overheated motors
10mm x 10mm mounting box - fits most planes designed with GWS gearboxes
Multiple gear ratios - 6.6:1, 5.3:1 & 4.4:1 gears included
Dual Ball Bearings with hardened shaft - efficient and durable operation
ACC4966 comes with hardened shaft and prop adapter for APC props
ACC3937 comes with 3 mm threaded shaft for GWS props
 "Himax Offset Gearbox for 20mm Brushless Motors")