The Right Screw Size For Retaining Your Rotor

Rotor retaining screws are used to hold rotors in place during the assembly of a car. They are not necessary for the safe operation of the vehicle, but they can make the assembly process easier by keeping the rotor in the correct position. The size of rotor retaining screws varies, with head diameters ranging from 11mm to 16mm and lengths from 9mm to 15mm.

Rotor retaining screw necessity

Rotor retaining screws are small screws that play a role in the assembly and maintenance of vehicles. While they are not necessary for the structural integrity or safe operation of a vehicle, they serve a specific function and offer some benefits.

The primary purpose of rotor retaining screws is to hold the rotor in place during the assembly process. They ensure that the rotor is correctly positioned and do not carry any load once the wheel is securely in place. These screws are designed to match the fit and function of the original part, making them a reliable replacement option.

Some people choose to discard these screws, as they are not critical for the vehicle's functionality. However, they can provide some advantages. For instance, they make it easier to hold the wheel with one hand while fitting the wheel bolts with the other. Additionally, they can help prevent the rotor from tilting when changing a wheel.

In terms of replacement, rotor retaining screws are available in various sizes and quantities to fit different vehicles. It is recommended to replace these screws when replacing brake rotors to ensure a proper fit.

While rotor retaining screws are not mandatory, they can be useful during the assembly process and for certain maintenance tasks.

Rotor retaining screw alternatives

Rotor retaining screws are used to hold the rotor in place and match the holes for the bolts holding the wheels. They are also used to stop the rotor from tilting when changing a wheel. While some claim that these screws are not necessary, others argue that they are important for centring the rotor and preventing vibrations.

If you are looking for alternatives to rotor retaining screws, here are a few options:

• Locating pins: Instead of screws, integral locating pins could be designed as a part of the rotor. This would ensure that the rotor is always correctly positioned without needing screws. However, this option may be too expensive for some auto engineering applications.
• Grease and WD-40: As the rotor retaining screws do not carry any load once the wheel is in place, you can use grease or WD-40 on the screws. This will make it easier to replace them without worrying about them working loose.
• Antiseize: Applying antiseize to the rotor retaining screws can help prevent rust and make it easier to remove the screws in the future.
• Impact driver: An impact driver can be used to remove and replace rotor retaining screws. This tool can make it easier to take out the screws without damaging the threads.
• Hammer and chisel/punch: If you do not have the right tools to remove the rotor retaining screws, you can use a hammer and chisel or punch to loosen the screws. This method may not be as precise as using an impact driver, but it can be effective if you do not plan on reusing the screws.

It is important to note that while some people choose not to reinstall rotor retaining screws, others argue that they are important for the proper functioning and safety of the vehicle. Before making any modifications to your vehicle, it is always a good idea to consult a certified mechanic or a trusted professional.

Rotor retaining screw sizes

Rotor retaining screws are not necessary for the safe operation of a vehicle. They are a small luxury that assists in the installation and replacement of rotors. The rotor is held in place or flush to the hub by the wheel being tightened. However, rotor retaining screws can make the process of changing a wheel easier by holding the rotor in place to match the holes for the bolts holding the wheel.

There are a variety of rotor retaining screw sizes available on the market. The Dorman HELP! range of rotor retaining screws, for example, offers screws in multiple sizes. The 13824 set screw has a head diameter of 11mm, a length of 15mm, and a tapered head seat type. The 13822 and 13823 set screws have a length of 10mm and 15mm, respectively, while the 13830 set screw has a head diameter of 14mm and a flat head seat type. The 14156 set screw has a head diameter of 16mm, and the 14157 set screw has a length of 9mm and 13mm. The 14160 set screw has a head diameter of 14mm and a flat head seat type, while the 14158 set screw has an Allen key drive style and a flat head seat type.

It is important to select the correct size and type of rotor retaining screw for your specific vehicle and application. Using the wrong size or type of screw can lead to problems with rotor alignment and balancing, which can cause vibrations or other issues.

Rotor retaining screw replacement

The rotor retaining screws are an essential component in the safe operation of your vehicle. While it is possible to replace them, it is important to follow the correct procedure to ensure the job is done safely and effectively. Here is a step-by-step guide to help you through the process:

Step 1: Understanding the Purpose of Rotor Retaining Screws

The rotor retaining screws hold the rotors in place during installation and replacement. They are not necessary for the wheel's function but act as a guiding mechanism to ensure proper alignment. The screws are designed to centre the rotor perfectly on the hub, preventing vibrations and uneven brake wear.

Step 2: Gathering the Necessary Tools and Materials

Before beginning the replacement process, ensure you have the correct tools and materials. You will need a replacement rotor retaining screw of the appropriate size and type for your vehicle. You may also require tools such as a drill, hammer, punch, impact driver, and an air gun, depending on the condition of the old screw.

Step 3: Removing the Old Rotor Retaining Screw

The removal process can vary depending on the condition of the old screw. If the screw is rusted or stripped, you may need to use a drill to remove it. Soaking the screw with penetrating oil before removal can also help. For severely damaged screws, you may need to use a wheel cutter or other rotary tools to remove them. Always wear appropriate safety gear during the removal process.

Step 4: Installing the New Rotor Retaining Screw

Once the old screw has been removed, it's time to install the new one. Clean and inspect the area to ensure there is no debris or damage that could affect the new screw. Apply a suitable lubricant or antiseize to the new screw to prevent future rust and seizure. Carefully thread the new screw into place by hand or with the appropriate tool, ensuring it is secure and properly aligned.

Step 5: Reassembling the Components

After the new rotor retaining screw has been installed, you can proceed to reassemble the components. Reinstall the wheel, ensuring it is securely fastened. It is important to follow the manufacturer's guidelines for torque specifications and safety procedures during reassembly.

By following these steps, you can safely and effectively replace the rotor retaining screw in your vehicle. Remember to consult a certified mechanic if you have any doubts or concerns during the process. Your safety should always be the top priority when working on your vehicle.

Rotor retaining screw removal

Rotor retaining screws are known to be a challenge to remove, often requiring the use of special tools and techniques. Here is a step-by-step guide on how to remove them:

Step 1: Try an Impact Driver

The first method to try is using an impact driver. This tool is designed to easily remove stubborn screws, and it is much easier to use than some of the other methods. Simply attach the appropriate bit for your rotor retaining screw head type and apply force while the tool is in reverse to unscrew it.

Step 2: Use Two Hammers

If you don't have access to an impact driver, another method is to use two hammers. Place the ball end of one hammer on the rotor screw head. Then, use the other hammer to strike the first hammer a few times. This impact can break up the rust that is holding the screw in place. It is important to wear safety glasses when performing this method to protect your eyes from any flying debris.

Step 3: Try a Punch and Hammer

If the screw still won't budge, you can try using a punch and hammer. Start by hammering the punch into the rotor screw head. Then, change the angle of the punch so that when you strike it with the hammer, it moves in a counterclockwise direction, essentially unscrewing the screw. An air hammer can also be used for this step if you have access to one.

Step 4: Alternative Method with an 8mm Bolt

If you are a beginner or the above methods don't work, there is an alternative method that uses an 8-millimetre bolt. First, check the rotors for two threaded holes on the hub of the rotor. Thread two bolts into these holes and turn them with your hand or a spanner until you feel some resistance. This action will push the rotor hub away from the axle hub, breaking free any corrosion on the retaining screws. Then, simply remove the bolts and you should be able to take out the retaining screws with a basic screwdriver.

Step 5: Reinstallation

It is important to note that rotor retaining screws are not necessary for the safe operation of the vehicle. They are primarily used to make the installation of brake components easier. However, if you choose to reinstall them, you can apply anti-seize or grease to prevent future rusting and seizing.

Remember to always exercise caution when performing any car repairs and to wear the appropriate safety gear, including safety glasses and gloves.

Frequently asked questions