Usually, you can find large bi-fold hangar doors at airports or in specialty production shops. We get requests for torsion spring hardware to counterbalance smaller bi-fold doors from time to time.
On bi-fold doors, the top of the door is hinged and secured to the outside top of the opening.…
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Full Time Customer Service Position with Benefits
For forty years, DDM has provided top-quality garage door and dock components for DIY residential as well as commercial B2B applications. We have a huge inventory of parts for same or next-day shipping along with quick delivery of garage doors.…
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The old Allister and Allstar openers use two black sprockets. The one above the motorhead moves to activate the limit switches as the limit dogs reach their shut-off points.
The one above the garage door acts as an idler.…
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An operator counter tracks door cycles: one opening plus one closing equals one cycle. To track the usage of a garage door, users often install counters on the operators.
One of the more common reasons to track door cycles is to schedule maintenance before the door or the operator needs repairs.…
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Sometimes, replacement v-belts on garage door operators are a different length than the original belt. In this video, we demonstrate how to adjust a LiftMaster motor so that the belt fits properly, even if it is a different length.
In this video, we demonstrate how to replace v-belts on LiftMaster operators.
For safety, unplug the power to the operator. Wedge a large screwdriver between the belt and the pulley.…
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One of the more common LiftMaster operators is the jackshaft operator. The operator transfers energy as torque power from the motor to the counterbalance shaft in order to open a sectional overhead door. When the counterbalance shaft turns, it opens or closes the door.…
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The logic board acts as the brain of the opener, telling it when to open and shut the garage door. In this video, we show you how to replace a LiftMaster logic 5 control board.
Engineers at the Chamberlain Group have designed their LiftMaster operators with error codes that reduce the time required to troubleshoot and repair equipment.
Operator product manuals cover a variety of error codes. In this video, we cover the four major problems that occur in an estimated 80% of operator failures.…
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Photo eyes keep garage doors from injuring people. They detect objects that would obstruct the door as it closes. However, a malfunctioning photo eye may keep the door from closing at all.
Often when a garage door will open but not close, the cause is a misaligned eye or a broken wire.…
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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.
