1. Introduction
This manual provides essential instructions for the safe and efficient operation, setup, and maintenance of your BORNTUN DB6320 Air Rivet Gun. Please read this manual thoroughly before using the tool to ensure proper function and to prevent injury or damage.
The BORNTUN DB6320 is a pneumatic hydraulic pop pull riveter designed for heavy-duty riveting tasks in various industrial applications, including machinery manufacturing, automotive, and general repair.
2. Product Overview and Features
The BORNTUN DB6320 Air Rivet Gun is a robust tool featuring a self-suction mechanism and a hydraulic drive design for efficient operation. Key features include:
- Powerful and Durable Design: Secure drive mechanism suitable for various rivet lengths without stroke adjustment.
- Self-Suction Riveter: User-friendly design for easy rivet loading and operation, even in confined spaces.
- Versatile Nosepieces: Includes 3/16-inch (4.8mm), 5/32-inch (4mm), 1/8-inch (3.2mm), and 3/32-inch (2.4mm) nosepieces, capable of pulling aluminum and stainless steel rivets.
- Efficient Operation: Three-piece steel teeth design for fast and reliable riveting, saving time during assembly.
- Quick Release Air Valve: Allows the cylinder to return rapidly for high-speed assembly operations, performing well at any angle.

Figure 1: The BORNTUN DB6320 Air Rivet Gun, a pneumatic hydraulic tool designed for heavy-duty riveting tasks. It features a blue and black body with a transparent mandrel collector.

Figure 2: Examples of industrial applications for the air rivet gun, including machinery manufacturing, car assembly and modification, container production, aviation equipment, medical instruments, and shipbuilding.

Figure 3: Detailed view of the BORNTUN DB6320 Air Rivet Gun, highlighting the self-suction mechanism with a rotatable collecting bucket for nail rods and the 46# hydraulic oil filling hole.
3. Setup
- Air Supply Connection: Connect the air inlet (1/4" NPT) of the rivet gun to a suitable air compressor using an appropriate air hose. Ensure the air pressure is within the recommended range (6-8 kgf or 85.34-113.79 PSI).
- Nosepiece Installation: Select the correct nosepiece size (3/32", 1/8", 5/32", or 3/16") that matches the diameter of the rivets you intend to use. Thread the chosen nosepiece onto the front of the tool securely.
- Initial Lubrication: Before first use, apply a few drops of pneumatic tool oil into the air inlet to lubricate internal components.
- Safety Check: Ensure all connections are secure and there are no air leaks. Wear appropriate personal protective equipment (PPE), including eye protection.
4. Operating Instructions
- Prepare the Rivet: Insert the rivet mandrel into the selected nosepiece of the rivet gun. The self-suction feature will hold the rivet in place.
- Position the Rivet: Place the rivet head into the pre-drilled hole of the materials to be joined. Ensure the rivet head is flush against the material surface.
- Activate the Tool: Press the trigger to activate the pneumatic mechanism. The tool will pull the rivet mandrel, expanding the rivet body and forming a secure joint. Continue holding the trigger until the mandrel snaps off.
- Mandrel Collection: The broken mandrel will be automatically collected in the transparent bucket at the rear of the tool.
- Empty Mandrel Collector: Periodically rotate the collecting bucket to pour out the accumulated rivet mandrels. (Refer to Figure 3 for location).

Figure 4: The BORNTUN DB6320 Air Rivet Gun being used to install rivets on a surface, demonstrating its application in a practical setting.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your BORNTUN DB6320 Air Rivet Gun.
- Lubrication: Apply a few drops of pneumatic tool oil into the air inlet daily or before each use.
- Hydraulic Oil Check/Refill: Periodically check the hydraulic oil level. If needed, refill through the 46# hydraulic oil filling hole. Use hydraulic oil specifically designed for pneumatic tools. (Refer to Figure 3 and Figure 5 for location).
- Cleaning: Keep the tool clean and free from debris. Regularly empty the rivet mandrel collector.
- Nosepiece Inspection: Inspect nosepieces for wear or damage. Replace worn nosepieces to ensure proper riveting.
- Storage: Store the tool in a clean, dry environment when not in use.

Figure 5: Close-up views showing the various nosepieces included with the tool, the three-claws steel teeth mechanism, the hydraulic oil filling hole, and the card cover for internal access.
6. Troubleshooting
If you encounter issues with your BORNTUN DB6320 Air Rivet Gun, consider the following common solutions:
- Tool Not Operating:
- Check air supply connection and ensure adequate air pressure.
- Verify the air compressor is turned on and functioning correctly.
- Ensure the trigger mechanism is not jammed.
- Rivet Not Setting Properly:
- Confirm the correct nosepiece size is installed for the rivet diameter.
- Check for sufficient air pressure.
- Inspect the nosepiece and jaws for wear or damage.
- Ensure the rivet mandrel is fully inserted into the nosepiece.
- Air Leaks:
- Tighten all air connections.
- Inspect air hoses for damage.
For persistent issues, contact BORNTUN customer support or a qualified service technician.
7. Specifications
| Parameter | Value |
|---|---|
| Model Number | DB6320 |
| Work Route | 19mm |
| Air Inlet | 1/4" NPT |
| Net Weight | 2.86 lbs (1.3 kg) |
| Height | 10 inch (25.4 cm) |
| Recommended Air Pressure | 6 kgf (85.34 PSI) to 8 kgf (113.79 PSI) |
| Rated Pulling (at 6 kgf) | 890 kgf (1962.11 lbf) |
| Rated Pulling (at 8 kgf) | 1180 kgf (2601.45 lbf) |
| Maximum Rivet Size | 3/16 inch (4.8mm) |
| Nosepiece Sizes Included | 3/16" (4.8mm), 5/32" (4mm), 1/8" (3.2mm), 3/32" (2.4mm) |
8. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact the seller directly. BORNTUN stands behind the quality of its products.
For further assistance or technical support, please visit the official BORNTUN store or contact their customer service department.
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