How Does An Air Rivet Gun Work?

An air rivet gun, also known as a pneumatic rivet gun or an air-powered rivet gun, is a specialised handheld tool used to install rivets in various applications. Air rivet guns utilise compressed air as their power source to drive the rivet-setting process efficiently. Here is how an air rivet gun works:

• Rivet Insertion: Insert the mandrel part of a rivet into the tool’s nosepiece. Then, insert the rivet body into the pre-drilled hole of the materials to be joined.
• Trigger Activation: When the operator activates the trigger, compressed air is released into the tool, creating a high-pressure environment.
• Rivet Setting: The high-pressure air forces a piston inside the gun to push against the hydraulic oil*, creating pressure in a hydraulic oil chamber, which in turn engages the jaw mechanism to pull the rivet mandrel, expanding the rivet body and clamping the materials together.
• Mandrel Extraction: Some air rivet guns are designed to collect the spent mandrel and eject it into a detachable container for easy disposal.

*Most air rivet guns nowadays are air-hydraulic type. A few air rivet guns are air-powered only, such as the FAR RAC83 Air Rivet Gun.

Advantages of Air Hydraulic Rivet Guns

• Speedy Installation: Air rivet guns excel in speed. They efficiently expel spent mandrels into a detachable container, reducing downtime and boosting productivity.
• Superior Traction Power: Air rivet guns often offer greater traction power than cordless rivet guns. This makes them ideal for installing large-diameter rivets, ensuring a secure connection.
• One-Handed Operation: Some air rivet guns utilise air suction to hold rivets in the nose, enabling convenient one-handed operation. This feature simplifies the process and enhances efficiency.
• Ease of Use: Unlike manual rivet tools that demand physical effort, air rivet guns are user-friendly and less physically demanding. They streamline the installation process, reducing operator fatigue.
• Uninterrupted Operation: With air rivet guns, there’s no need to worry about battery life or replacement. These tools rely on continuous compressed air for consistent operation.

Considerations When Using a Pneumatic Rivet Gun

To ensure the safe and effective use of your air rivet gun, consider the following:

• Correct Nosepiece Selection: Always choose the right-sized nosepiece to match your rivets, ensuring a secure fit.
• Secure Nosepiece: Before use, tightly secure the nosepiece with a spanner to prevent mishaps during operation.
• Proper Air Pressure: Adjust air pressure using an air regulator according to the tool’s specifications. Overpressurisation can damage the tool, so adhere to the manufacturer’s guidelines.
• Safety First: Safety is paramount. Equip the tool with a mandrel collector before operation, and empty it regularly to prevent jams. Wear eye protection and follow all manufacturer safety instructions.
• Test Run: Conduct a test run before high-production tasks.

Maintaining Your Air Riveter for Peak Performance

For best results and longevity, follow these maintenance tips:

• Regular Lubrication: Keep the tool well-lubricated by adding a few drops of standard air tool oil into the air inlet.
• Hydraulic Oil Maintenance: Follow the manufacturer’s instructions for maintaining the hydraulic oil level. Signs of low oil include difficulty installing rivets in one stroke or incomplete rivet insertion.
• Frequent Cleaning: Regularly clean the jaws and nose assembly area to prevent the buildup of rivet swarf, avoiding jaw mechanism malfunctions.

For more information on air rivet guns, please read the Mastering Air Rivet Guns: Tips and Maintenance blog.