It is the most widespread type, and it involves an old-fashioned chain which drives the garage door up or down. A good thing about chain drives is their reliability and durability. They require little maintenance and last a long time.On of the rare disadvantages of the chain drive is a slightly higher level of noise. It makes them suitable for industrial or detached, isolated garages.
Compared to chain drives, these garage door openers are quieter and smoother in operation. They work best in home garages because they are quiet. However, they can be a bit more expensive when compared to the chain is driven garage door openers.
These openers operate via a threaded steel rod which rotates and moves the trolley. The trolley then operates the doors, opening or closing them. They are tough and reliable because they usually involve less components when compared to two previos types. This also makes them virtually maintenance-free. A higher level of noise compared to belt drives is the only disadvantage.
Jackshaft and direct-drive openers
Jackshafts are based on a cable and torsion bar system. The garage door opens when the cable tightens and vice versa. They mount on the wall on the side, leaving the top of the garage free. They are quiet, but also quite expensive.
Direct-drive units are probably the quietest because they have only one moving part – the motor itself. In this case, the motor moves down a stationary chain fixed onto an overhead rail. They are very reliable and quiet.
These are based on DC, making them very efficient, quiet, fast and light. Battery packs make them practically autonomous because they can run without power for a few days., but they do not have the same life expectancy as AC motors.