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Garage doors |
Torsion spring lift mechanism - a torsion spring counterbalance system consists of one or two tightly wound up springs on a steel shaft with cable drums at both ends. The entire apparatus mounts on the header wall above the garage door and has three supports: a centre bearing plate with a steel or nylon bearing and two end bearing plates at both ends. The springs themselves consist of the steel wire with a stationary cone at one end and a winding cone at the other end. The stationary cone is attached to the centre bearing plate. The winding cone consists of holes every 90 degrees for winding the springs and two set screws to secure the springs to the shaft. Steel counterbalance cables run from the roller brackets at the bottom corners of the door to a notch in the cable drums. When the garage door is raised, the springs unwind and the stored tension lifts the door by turning the shaft, thus turning the cable drums, wrapping the cables around the grooves on the cable drums. When the door is lowered, the cables unwrap from the drums and the springs are rewound to full tension. Life of a torsion spring on garage doors - most manufacturers of garage doors and dealers of garage doors, either produce and/or sell garage doors fitted with torsion springs that have a minimum of 10,000 - 15,000 cycles. This number of cycles allows the garage doors to open and close an average of 3 to 7 years. However, it is important to remember that if the weight of the garage door is increased by adding glass, do it yourself insulation, or even several coats of paint, the life of the torsion spring will greatly be reduced. Other factors like poor garage door maintenance, loose tracks, or faulty components will shorten the life of torsion springs. Never apply grease to the tracks of the garage door, this will prevent the wheels on the rollers from doing their job. Only grease bearings, and spray light coat of lubricant on hinges and springs. Extension spring lift mechanism - an extension spring counterbalance system consists of a pair of stretched springs running parallel to the horizontal tracks. The springs lift the door through a system of pulleys and counterbalance cables running from the bottom corner brackets through the pulleys. When the door is raised, the springs contract, thus lifting the garage door as the tension is released. Safety - many accidents take place when the homeowner and/or end user does not take
the time to look at the safety precautions prior to attempting to do-it-yourself.
There are certain processes a DIY person can do to help keep the long term
reliability of their overhead garage door intact: Maintenance of garage doors - the balance of the door should be checked monthly also. One should be able to
raise and lower the garage door without any resistance and it should smoothly roll
along the tracks and should remain stationary at any point of travel. Usually a
door that does not pass these tests is out of balance and should be adjusted. It
is usually recommended that only a trained door technician with the proper
instructions or a mechanically experienced person adjust or replace the springs.
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