Garage Door Parts: Identification, Function & Replacement

For many people, the garage door is their home’s main entry and exit point. Garage doors work tirelessly in the background, often for decades, but there’s an intricate network of garage door parts that need to work in tandem to keep things functioning properly. If one fails, the entire unit could fail. There’s no shortage of options when it comes to garage door parts and accessories.

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Garage Door Opener and Components

The garage door opener and its components are the heart of your system, finding the best garage door opener for your home is important. Most units hang from the middle of the ceiling, and all of them contain a circuit board. The circuit board acts as the brain of the garage door opener, sending and receiving signals between remote controls and wall consoles and helping to detect obstructions. Garage door openers need a motor and a drive mechanism to lift and lower the door.

There are three main types of motors that power garage door openers:

  • Electric: The most common type of motor for residential properties, electric motors require electricity to function. 
  • Hydraulic: Hydraulic motors are powered by pressurized oil. The oil pushes a piston within the motor, resulting in a rotating shaft opening and closing the garage door.   
  • Pneumatic: A less common option for residential use, pneumatic motors release pressurized air to generate power.

A garage door opener’s drive mechanism acts as a conduit between the motor and the door itself. The most common drive mechanisms are chain, belt and screw drives. Other options include direct drive and jackshaft mechanisms.

  • Chain drive: The aptly named chain drive uses a metal chain to lift and lower the door. It’s the most common and cost-effective option. 
  • Belt drive: A rubber belt reinforced with steel powers the door. Belt drives are quieter than chain drives. 
  • Direct drive: A sleek but expensive option, direct drive units have a stationary chain that the motor moves across. 
  • Jackshaft: Jackshaft openers are quiet, space-saving units that use torsion tubes to move the door. Instead of hanging from the ceiling, they’re located on the side of the garage door. 
  • Screw drive: A screw drive uses a threaded steel rod that acts like a screw to power the door’s movement. 

Essential Garage Door Spring Components

Garage door springs help counterbalance the door’s weight by tightening when it closes and loosening when it opens. There are two main types:

  • Torsion springs: A popular choice for residential applications, torsion springs are tightly wound coils located above the garage door that store and release energy to open and close it. 
  • Extension springs: Extension springs run parallel to the horizontal tracks on either side of the garage door, expanding and contracting to raise or lower it. 

Depending on the type of springs you have, key additional components include the tube shaft, center bearing plate and winding cone for torsion springs, and pulleys, cables, and hardware for extension springs.

garage repair service provider fixing part of a garage door
new garage door opening

Garage Door Track System Components

Your garage door’s track system is a series of vertical and horizontal channels that hold the rollers in place, allowing the door to open and close seamlessly. The industry-standard width for household tracks is 2 inches. Some of the track system’s main components include:

  • Vertical tracks: The metal channels that run bottom-to-top from the track brackets to the splice plates on either side of the door.
  • Horizontal tracks: The channels that run horizontally to the ground, holding the door in place when open. 
  • End bearing plates: Designed for use with torsion-spring systems, end bearing plates secure the track system to the garage door header and/or horizontal track. Supported end bearing plates secure both the header and horizontal track. Unsupported end bearing plates secure only the horizontal track.   
  • Brackets: Jamb brackets secure the vertical tracks to the frame of the garage, flag brackets secure the vertical and horizontal tracks where they meet, and reinforcement brackets strengthen the connection between the top section of the door and the opening arm, reducing wear and tear over the years.

Expert Tip>>> Garage Door Track Replacement Cost

Garage Door Rollers and Hinges

Garage door rollers are small wheels, typically 2-inches in diameter, that fit within the tracks and allow the door to smoothly raise and lower. Hinges serve many purposes, including providing overall stability to the unit and allowing the panels to transition from a vertical to horizontal position. Each has multiple options. 

  • Nylon rollers: Nylon rollers are quiet, durable, and a top upgrade pick for residential homes. 
  • Steel rollers: Known for their exceptional strength and long-term reliability, steel rollers are typically best suited for commercial use.  
  • Bearing rollers: There are two main types of bearing rollers – sealed and unsealed. They contain ball bearings to help reduce friction and noise, and are one of the most popular choices for homeowners.
  • Standard hinges: Standard center hinges are installed along the length of the door to provide support and connect the panels together. End hinges are installed toward the left and right ends of the garage door panels and hold the rollers in place.  
  • Heavy-duty hinges: These thick-gauge hinges are made from the most durable materials and often feature powder coating and a galvanized finish to protect against the elements.

Garage Door Cables & Pulleys

Both torsion- and extension-spring garage door systems use a series of cables and pulleys to lift and lower the door and to keep the components in place.

  • Lifting cables: As the name implies, the lifting cables are responsible for lifting and lowering the garage door.
  • Safety cables: Also known as retaining cables, safety cables are only used with extension spring units. They act as a failsafe if the primary cable breaks and help to prevent potential injury. 
  • Cable drums: Cable drums are used in torsion spring systems to wind the doors up and down. 
  • Sheave pulleys: For use with extension spring units, sheave pulleys are also responsible for raising and lowering the garage door.

In addition to these core components, garage door cable and pulley systems also utilize various cable attachments and tensioners.

Garage Door Panels and Sections

Garage door panels are the horizontal sections connected by hinges that form the door itself. There are dozens of options to choose from in terms of style, materials and price point. Steel panels are the most popular right now among homeowners, but other options include wood, fiberglass, and aluminum. 

If you live in a colder climate, insulated panels might be worth looking into to help increase the energy efficiency of your home. Many garage doors have window inserts, which also come in a wide variety of styles. Window inserts can be replaced if they’re damaged, and replacement panel sections are also available if needed.

Two-panel garage door featuring full panel windows in white.
Garage door rollers and track, white aluminum garage door

Hardware and Fasteners for Garage Doors

Garage doors are held together and strengthened by dozens of hardware components. Lag bolts and screws secure anything from hinges and tracks to rollers and panels. Track bolts and hinge bolts secure their namesake components, while spring fasteners are designed to hold torsion springs in place. 

Garage Door Weatherproofing Parts

Weatherproofing your garage is crucial both for energy efficiency and prolonging the life of the system. If they’re not already pre-installed, consider weatherproofing your door with garage door seals:

  • Bottom, top and side seals: Strips of rubber, vinyl or other material designed to keep rain and debris out of your garage.
  • Threshold seals: In addition to or instead of the manufacturer’s seals, some homeowners choose to add weatherstripping, threshold seals, or draft stoppers at the base of their garage door. 
  • Insulation kits: Installing an installation kit to the inside of your garage door panels is a simple, budget-friendly way to increase energy efficiency and regulate the temperature in your garage. 

Safety and Security Parts

Though their purpose is simple, garage doors are made up of a complex network of heavy, potentially dangerous components and materials. Several products are available to help prevent injury and system malfunction.

  • Safety sensors: Infrared sensors positioned toward the bottom of the door. If the infrared beam senses an obstruction, the garage door will remain open.  
  • Emergency release cord: The emergency release cord hangs from the center of the garage door and is often. If there’s an electrical or other type of failure, pulling the cord will turn the motor-powered door into a manual door.
  • Security reinforcements: Locks, latches, motion detectors, and reinforcement bars can all be added to your door to help prevent theft and wind damage.

Common Questions About Garage Door Repair Parts

Some frequently asked questions about garage door parts include:

Yes, most garage door parts can be purchased separately for DIY installation. Before taking on any replacement or installation project, always review the safety protocols and consider speaking with a licensed, professional garage door installer. 

The lifespan of a garage door depends on the quality of the parts, how much use the door gets, and other factors. On average, a well-maintained system typically lasts 15 to 30 years. 

Yes, you can buy individual panel sections for one-off replacement.

Garage door parts are not typically universal and are instead specific to the manufacturer and door model. Some hardware and weatherproofing components, however, can be used nearly universally.

Tips and Expert Advice for Your Garage

Stay informed with expert advice on garage door maintenance, garage door service, garage door replacement, and upgrades. Explore our blog for guides, troubleshooting tips, and more.

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