In this video, we use a LiftMaster operator to demonstrate how to replace the clutch on a commercial jackshaft operator. The clutch is one of the three safety systems manufacturers build into their operators.
Commercial Operator Clutches are one of the safety devices that operator manufacturers use to keep their doors from causing injuries or damage. The clutch will slip, which keeps the operator from forcing the door open or shut if something is obstructing it.…
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The DDM Torsion Spring Safe-T-Winder™ uses a drill to wind garage door torsion springs. Now you can wind torsion springs safely without winding bars!
Historically, winding torsion springs has been one of the most dangerous aspects of garage door maintenance.…
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Limit switches are used to keep the garage door opener from trying to open a garage door that is already open, or trying to close a door that is already closed. Throughout the history of garage doors, engineers have come up with a wide variety of limit switch designs.…
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Amarr created a unique, pinch-proof design for their doors.
The basic principle behind pinch-proof hinges is to prevent people from trying to close the door manually by sticking their fingers between the sections of the door. Smashed fingers have led to numerous lawsuits.…
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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.
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.
