Spring rate, torque, and lift: The spring rate K for these measurements is π*28.5*10^6 * (0.273)^4 / (32 * 140 * 1.72) = 64.5 IPPT. Applying 7.5 turns on this rate will yield a torque of 7.5 * 64.5 = 484 in-lb, which on the 4-inch drums (2-inch radius) yields a lift of (484 in*lbs)/(2 in) = 242 lbs. Again we find good agreement with the approximate door weight of 238 lbs.
Screw - Screw-driven lift systems attach a long screw to the motor to move the garage door. These systems are powerful, fast, relatively quiet and require less maintenance than typical chain- or belt-driven systems. Genie and Overhead Door are two popular brands that make screw-driven systems. Based on our research of Genie’s line, you can expect to pay $244 on average for a screw-driven garage door opener.
Establish an alternate entry to your garage or update an existing one with our selection of garage entry doors. With an entry door, you will lose less heat or air when you enter your garage to work. Our variety of garage and outdoor organization materials will help you keep all the items in your garage neatly and efficiently organized while our floor coatings and utility flooring will help ensure your cement garage floors last longer than if they were left untreated.
Our knowledgeable, dependable and friendly team of professionals can work closely with you to select, design and install a quality garage door that best serves your daily needs, enhances the architecture of your home and fits your budget. The extensively trained and experienced technicians at Kitsap Garage Door can help you with any of your garage door service needs, large or small, and are ready to repair any garage door make or model.
Torsion springs have three advantages over extension springs: They’re quieter, safer and easier to fine-tune. Torsion springs are quieter because you don’t have a spring knocking against a roller track. They’re safer because when a spring breaks, it usually stays on the bar. Finally, you can fine-tune the tension on a torsion spring so the door is perfectly balanced. Setting the tension on torsion springs has always been very dangerous, but torsion and extension spring systems with easy, do-it-yourself tensioning (Photo 7) are available. If you don’t use one of these DIY-friendly, easy tensioning systems (Clopay EZ-Set Spring and Wayne-Dalton TorqueMaster are two brands), you should hire a professional to release and set the tension on a torsion spring.
The "liability" angle: The flip side of "safety issue" is "liability". This is not used to directly sell you something; it is used to demean the cheaper alternative and prod you into buying a more expensive (and profitable) option. For example, you may be pressured into buying a whole new door, when you just need a new spring, by the salesman telling you he can't just replace the spring due to "liability" issues. Since product liability is a big burden on the garage door industry, and so many old doors (and especially automatic openers) are dangerous, this may be a genuine reason to accept a higher price.
A garage door is a large door on a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. Small garage doors may be made in a single panel that tilts up and back across the garage ceiling. Larger doors are usually made in several jointed panels that roll up on tracks across the garage ceiling, or into a roll above the doorway. The operating mechanism is spring-loaded or counterbalanced to offset the weight of the door and reduce human or motor effort required to operate the door. Less commonly, some garage doors slide or swing horizontally. Doors are made of wood, metal, or fiberglass, and may be insulated to prevent heat loss. Warehouses, bus garages and locomotive sheds have larger versions.
Another recent innovation in the garage door opener is a fingerprint-based wireless keypad. This unit attaches to the outside of the garage door on the jamb and allows users to open and close their doors with the press of a finger, rather than creating a personal identification number (PIN). This is especially helpful for families with children who may forget a code and are latchkey kids.
(The Wahl correction factor accounts for additional stress in the material due to shear forces, although these forces do not contribute to the spring's torque. These shear forces become significant in designs using a low spring index, which is to say, a relatively thick wire for the coil diameter. The correction factor is applied to scale up the stress S to better predict the fatigue lifetime of the spring.)
The optician's trick: The serviceman looks over your door with lots of scowling, chin-scratching, and tsk-tsking. You ask, "how much?" He replies with the fair price. If you don't flinch at that price, he says, "for the parts", while quoting a large additional cost for the labor. If you still don't flinch, he adds, "each," while pointing back and forth to your pair of springs. (I hope none of you service people are reading this!) I call this the "optician's trick" after the old vaudeville joke about lenses, frames, and left/right.
We would definitely recommend Precision to anyone that needs garage door services! We were able to get a service appointment right away! Tom arrived and was very professional and courteous. He took the time to go over what repairs were needed and provided an estimate. He was ready to do the repairs right then and there and within a few hours, we had our garage door up and running like new! Thanks to Tom and Precision for a positive experience!
Repair of garage doors is a licensed trade in many jurisdictions, and manipulation of the market inevitably follows. Look in your phone book yellow-pages under "garage doors" and you'll find a lot of big, costly ads for door service. The profits are quite juicy, I'm sure. The customers need service urgently, and this need will typically arrive suddenly and at a busy time when shopping for prices is not convenient. A few dollars in parts, an hour of labor and travel, and a $150 invoice (assuming the outfit is charging fairly, some are not). Lately (2006) I hear of outfits charging $200 or $300 for this work, and occasionally a story of a $500 or $800 service call. You'll also find the phonebook advertisers waiting eagerly for your call, because artificially high prices inevitably lead to an oversupply of service firms working under capacity.
Of course, the best garage door openers offer much more than weather protection. They are quick and convenient when leaving or returning home. They can secure what might otherwise be a weak point of home security. Some can even alert you at work if your garage doors aren't closed properly. The challenge you face is finding the right one – this isn’t a product you can simply try out and return until you find the best fit for your situation.
Garage doors are the largest moving object inside your home. If you have a problematic garage door, it compromises the safety of your family and home. Ankmar Denver is a professional company you can count on. We provide you with quality service at a reasonable price. We offer FREE estimates on replacement garage doors and are spring replacement specialists. 24 hours a day 7 days a week we are your number one garage door repair service.