EDCWDTYYECName: bevel 90-degree steeringspeed ratio 1:28mm shaftModulus: 1 modNumber of teeth: 20 teeth / 40 teethBore: 8 mm / 8 mmOuter Diameter: 21.79mm / 40.89mmStep outer diameter: 16 mm / 25 mmStep length: 8.6mm/8 mmTooth length: 5.7mmOverall length: 15.03mm / 15.02 mmFixing screw hole: M5*2 fixing screw holeMaterial: 45 steelThe overall weight of the 1:2 reversing reducer is 0.42kgFrame material: aluminum alloyThis product has no fixed mounting holes, the buyer needs to punch holes and fix it by himself, and there is no cover on the top and bottomThis product is a simple model and cannot be used for high-speed operation. It is used in places where accuracy is not required.This model is a deceleration device, input 2 turns, output 1 turn, can not be used as a speed increase in reverse!