Lift cable placement: On the standard residential door mechanism, the loops at the lower ends of the two lift cables loop over the two bottom roller shafts which project from the bottom bracket on the door. The upper cable ends fasten to the drums using one of the methods described above. The drums are positioned along the torsion shaft such that the inner edge of each drum is approximately over the edge of the door. The cable winds onto the drum from outside in, so at the top of travel the cable is winding onto the inner edge of the drum, vertical from the edge of the door where it is looped over the roller shaft. As the door is lowered, the cable winds out to the outer edge of the drum, and thus is a bit out from the vertical, but the cable still falls in the gap between the guide rails and door edge. My cables rub and slap on the rails a bit, but after 30 years and many 10,000s of cycles, they don't seem to have worn at all.

At Garage Doors & More, we are an authorized dealer for Pella, Amarr, Clopay and Haas Garage Doors. Feel free to check out our site to find the door that fits best for your home. In the top navigation bar there is a drop down. The garage doors tab is where you will find traditional garage doors. There is also another tab that will lead you to a page for our energy efficient garage doors. Other tabs include pages for our Carriage Garage Doors and Wood Garage Doors. You can also click the button below to see some of our special offers!
Once the shaft, springs, and center bearing plate come down and lay on the floor, the old springs should be easy to get off and new ones slid on and assembled. Two bolts hold the center cones to the center bearing plate. The bearing on the center plate can be oiled while it is exposed from having the springs off. At this point it is a relief to be working with inert parts while standing on the floor rather than energized parts while up on the ladder. You might think it would save a little time to replace the spring with the shaft left up on the wall, but I found it was easier and safer to lower the works down to the garage floor first.
The Entire job from order through installation was great. The person at Home Depot who helped us made sure we knew exactly what was needed and went over options answering all questions my Fiance had before I could. On install day the installers were not only on time but early which was perfect as i planned my day around them being there and it allowed me to leave a little earlier when they finished to take care of other things. They were polite, knowledgeable, and engaging. Read less
Stress and lifetime: Calculating the maximal stress in the wire is useful for estimating the lifetime. Using the formula above, the bending stress S in the spring wire is 32*238/(π*0.2253^3) = 212 Kpsi. The spring index C is D/d = 2.23 / 0.225 = 9.88. The Wahl correction factor is Kw = (4C-1)/(4C-4) + 0.615/C = 1.15. The Wahl-corrected stress is Kw * S = 1.15 * 212 Kpsi = 244 Kpsi. This predicts about a 10,000-cycle lifetime, which is the standard "cheap spring" configuration originally installed. Note that while this stress is proportional to the torque being applied, it is also in proportion to the inverse third-power of the wire size. Thus slightly heavier wire sizes (and suitably adjusted D and/or L) radically improve the expected cycle lifetime of the spring.
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Great!  We specialize in all sorts of garage door repair work.  Working around the garage door can be fairly dangerous if you’re trying to repair this issue on your own.  Most garage door companies will quickly remind folks about this, and it’s true.  Their are some hazards to watch out for when working around these heavy and high tension doors.  We recommend you give an expert a call to address the issue in a safe and timely manner for you.
For most homeowners, the garage also functions as the primary entrance to their house. With repetitive daily use, your garage door can experience normal wear and tear and require professional attention. The trained and experienced technicians at Kitsap can help you with any repair needs you may have and will expertly service any garage door brand or type.
Extension spring systems should always be restrained by a safety cable that runs through the middle of the spring, tying off to a solid point at the rear and front of the horizontal door track. Extension springs represent a hazard to bystanders when a spring, pulley, or cable breaks under tension. Metal parts from extension spring systems can suddenly be launched.
J&S Overhead Garage Door Service also specializes in garage door opener repairs including broken gears, safety sensors, garage opener and chain adjustments and even remote and keypad replacements. Our technicians service major brands and carry necessary parts ad equipment parts on the trucks so you will never have to wait for a repair. If your opener can’t be repaired we do offer same day and same appointment professional installations offering several different garage door opener including chain and belt drive options.
Garage door manufacturers typically produce garage doors fitted with torsion springs that provide a minimum of 10,000 to 15,000 cycles and are guaranteed for three to seven years. One cycle is a single opening and closing sequence. Most manufacturers offer a 30,000 cycle spring. However, it is important to remember that if the weight of the garage door is increased by adding glass, additional insulation, or even several coats of paint, the life of the torsion spring may be greatly reduced. Additionally, springs at highly humid environments, such as coastal regions tend to have a significantly shorter cycle life, due to the corrosive cracking.

Garage Door Repair

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