Garage Door Opener
Garage door openers are an indispensable device for car owners.
Garage Door Opener is a motorized tool which opens and closes garage doors. Switches placed in garage walls control them. These switches have remote controls handheld by car owners.
Drive System
•screw-drive system
It has an elevating mechanism which moves with the threaded steel rod. It is a powerful unit which requires least maintenance. The body of the opener is situated at the center of garage ceiling. The price range of these units is between $150-200.
It uses a long screw inside the rail which pushes the trolley. It is the slowest among all openers. However it applies more force than the others. It is useful for one piece larger and heavier doors. It is also quieter than the chain openers.
•chain drive system
It has a lifting mechanism operated by a metal chain which moves with its tracks.
They are the most popular and least expensive openers. However, they create more noise than screw types. Chain drives are also found in the center of a garage ceiling.
The price range of these units is between $100 and $170.
The chain loop is inside the rail. The rail guides the trolley which is attached to the door arm. The door arm is attached to the door. Most units come with