Two primary drive mechanisms power residential garage door openers: belt and chain. A chain drive utilizes a metal chain, similar to a bicycle chain, to move the trolley that pulls the door open or closed. A belt drive employs a rubber belt, often reinforced with steel, for the same purpose. This fundamental difference affects the operational characteristics of the opener.
Selecting the appropriate drive mechanism significantly impacts the long-term homeowner experience. Quieter operation and smoother movement are often associated with belt-driven systems, making them popular choices for garages attached to or located near living spaces. Chain drives, while typically more affordable, tend to produce more noise and vibration. The development and refinement of these drive systems reflect the ongoing pursuit of improved performance and user convenience in garage door automation.