Garage door opener limit switches electrically limit the door travel as it opens and closes. These switches “tell” the opener or operator when to stop. In this video, we explain how LiftMaster limit switches work, and how to adjust them.
LiftMaster uses a common system of nuts on a shaft to limit the movement of garage doors.…
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Commercial door operator manufacturers have designed three standard safety systems: the clutch, the photo eyes, and the rpm sensor. These keep the door from injuring people or damaging objects that might be obstructing the door.
First is the mechanical clutch that slips when something obstructs the door.…
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In the garage door industry, we distinguish between “openers” for residential applications and “operators” for commercial and industrial applications.
Back in the early eighties, I worked for Northwest Door in Elgin, Illinois. While there, I got to know a gentleman who had formerly worked for John Greene Corporation in Downers Grove, Illinois.…
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Ordering the correct PowerMaster Operators can be simple if you begin with the correct details. Here are some tips for how to order one of our hoist operators.
Push Down Bumper Springs start the door on the down cycle by pushing on the top of the door.
Jackshaft openers such as the Liftmaster 8500 or the 8500W turn the torsion shaft to operate the door. Under certain circumstances, it is advisable to use pusher springs to help the door close if the door cables come off the drums as the door begins to close.…
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There are two types of operators, drawbar with trolley and jackshaft. We will cover some potential solutions since Jackshaft operators tend to cause cable problems.
On trolley type operators, the drawbar arm pushes and pulls the top of the door to open and close it.…
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V.E. Power Door is the manufacturer of the PowerMaster brand of sectional door, rolling door, and sliding gate operators. The founder, Philip Lanzarone, established V.E. Power Door in October of 1969. Furthermore, from its Long Island facility, the original creation of the company was to service North American Door.…
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Huge inventory of torsion springs for same or next day shipping! Here you will find all you need in the most common sizes of 1 3/4," 2," 2 1/4," and 2 5/8" inside diameter springs. Larger 3 3/4" and 6" inside diameter commercial and industrial springs may require a day or two to ship. You'll also find TorqueMaster Springs, Extension Springs, Self-Storage door springs, steel rolling door springs and springs for one piece single panel doors.
Shelves packed with every part you need to fix your doors.
Please note. Shipping times and costs have changed. Normal transit times are currently not guaranteed, even on next day and second day shipments. Shipping prices on items over eight feet have more than tripled.
