DDM Garage Doors Blog -

The DDM Torsion Spring Safe-T-Winder™

Tuesday, November 15th, 2022 at 4:14 pm by Dan Musick

Now you can wind torsion springs safely without winding bars!

The Torsion Spring Safe-T-Winder
The DDM Garage Doors Safe-T-Winder™ turns the end of the shaft to easily wind springs on doors weighing up to 1500 pounds.

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Different Types of Limit Switches

Wednesday, November 2nd, 2022 at 8:04 pm by Dan Musick

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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How to Counterbalance a Bi-fold Hangar Door

Saturday, May 7th, 2022 at 9:40 am by Liz Dzik

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.

A view of a bi-fold hangar door that is partially open.

On bi-fold doors, the top of the door is hinged and secured to the outside top of the opening.…

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Customer Service Representative

Saturday, January 22nd, 2022 at 11:45 am by Dan Musick

Full Time with Benefits

About DDM Garage Doors

For forty years, DDM has been providing top-quality garage door and dock components for DIY residential and 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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Allister, Allstar & Raynor Sprockets

Monday, November 8th, 2021 at 12:53 pm by Dan Musick

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.

Allstar Model 6500 Garage Door Opener

The one above the garage door acts as an idler.…

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Counter Wiring for A LiftMaster Operator

Friday, December 18th, 2020 at 5:55 pm by Dan Musick

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.

An image of  a LiftMaster operator with an external counter showing 196,491 cycles.
This 24-volt counter shows that the operator has cycled 196,491 times.

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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How to Adjust a LiftMaster Motor So the Belt Fits

Friday, December 11th, 2020 at 6:33 pm by Dan Musick

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.

If a v-belt is too tight or too loose, you can adjust the motor to get the proper fit.

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How to Replace V Belts on LiftMaster Operators

Friday, December 4th, 2020 at 6:39 pm by Dan Musick

In this video, we demonstrate how to replace v-belts on LiftMaster operators.

There is a safe and easy way to replace operator V-Belts.

For safety, unplug the power to the operator. Wedge a large screwdriver between the belt and the pulley.…

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LiftMaster Model J Drive Components

Friday, November 6th, 2020 at 6:46 pm by Dan Musick

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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How to Replace a LiftMaster Logic 5 Control Board

Friday, October 30th, 2020 at 4:35 pm by Dan Musick

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.

Simple Instructions for How to Replace a LiftMaster Logic 5 Control Board
  1. Check to assure you ordered the correct logic board.

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Unmatched Support. The Right Part. DIY with Confidence!


Huge inventory of parts and 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. Please contact us for specialty springs such as TorqueMaster, EZ Set, self-Storage, and steel rolling door springs as many of these have been subject to supply chain shortages. Larger 3 3/4" and 6" inside diameter commercial and industrial springs may require a day or two to ship.

COVID update. No mask, no service! When picking up parts please wear a mask. We'll gladly provide one. Please honor the six foot social distancing rule. Thank you for your patience and understanding.

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.