SMD Hollow Rotary Gearbox, ST Series Gearbox is widely used in Industries where precise rotational output is required. Internal Gearing system of ST Series consist of a Input Gear, Intermediate Gear and Spur Gear. Rotational input is provided to the Input Gear which acts as driving gear and this rotation is transmitted to the intermediate Gear. Gear profiles are machined on each Gear for reduction in Rotation. This Intermediate Gear indeed transmits rotation to the Spur Gear which acts as an output. In this way whole reduction ratio is achieved from start till end using internal Gearing unit.

Website Link - https://www.smdgearbox.com/hollow-rotary-gearbox

Reference Image - https://dribbble.com/shots/17594257-Internal-Gearing-System-of-SMD-Hollow-Rotary-reducer