Eastvolt EV-BT-501
Eastvolt EV-BT-501 3-in-1 Rivet Gun, Rivet Nut Tool, and Reamer Instruction Manual
Model: EV-BT-501
1. Introduction
The Eastvolt EV-BT-501 is a versatile 3-in-1 tool designed for various fastening and reaming tasks. It combines the functionalities of a rivet gun, a rivet nut tool, and a reamer into a single, efficient unit. This manual provides detailed instructions for the safe and effective use of your tool.

Image 1.1: The Eastvolt 3-in-1 tool highlighting its core functionalities.
2. Safety Instructions
Always follow basic safety precautions when using any hand tool to reduce the risk of injury. Read all instructions carefully before operation.
- Wear appropriate personal protective equipment (PPE), including safety glasses, to protect your eyes from flying debris.
- Keep your work area clean and well-lit. Cluttered or dark areas invite accidents.
- Do not operate the tool while under the influence of drugs, alcohol, or medication.
- Keep children and bystanders away while operating the tool. Distractions can cause you to lose control.
- Ensure the workpiece is securely clamped or held before applying force with the tool.
- Use the correct size and type of rivets, rivet nuts, or reaming mandrels for your application.
- Inspect the tool for any damage before each use. Do not use a damaged tool.
- Store the tool in its carrying case in a dry, secure location when not in use.
3. Components Included
Your Eastvolt EV-BT-501 tool kit includes the following items:
- Eastvolt 3-in-1 Rivet Gun, Rivet Nut Tool, and Reamer body
- 5 interchangeable rivet heads: 2.4mm, 3.2mm, 4.0mm, 4.8mm, 6.4mm
- 50 aluminum rivets (10 pieces of each size: 2.4mm, 3.2mm, 4.0mm, 4.8mm, 6.4mm)
- 6 interchangeable rivet nut mandrels: Metric (M5, M6, M8) and SAE (10-24, 1/4-20, 5/16-18)
- 60 rivet nuts (10 pieces for each mandrel size)
- 2 reaming mandrels: Arc (round) and Rectangle (square)
- Compact carrying case

Image 3.1: Overview of the Eastvolt 3-in-1 tool and its complete accessory set.

Image 3.2: Detailed view of the included rivet nuts and rivets.
4. Setup and Changing Components
The Eastvolt EV-BT-501 is designed for tool-free changing of mandrels and nose pieces, ensuring quick and easy setup for different tasks.
4.1 Changing Rivet Heads or Rivet Nut Mandrels
- Unscrew the current nose piece or mandrel assembly by hand, turning counter-clockwise.
- Select the appropriate rivet head or rivet nut mandrel for your application.
- Screw the new component onto the tool body by hand, turning clockwise, until it is securely tightened.

Image 4.1: Tool-free changing of rivet heads and mandrels.
5. Operating Instructions
This section details the operation of each of the tool's three functions.

Image 5.1: The Eastvolt tool in its three configurations.
5.1 Rivet Gun Function
Use this function for setting blind rivets. Ensure the correct rivet head size (2.4mm, 3.2mm, 4.0mm, 4.8mm, or 6.4mm) is installed.
- Drill a hole in your workpiece that matches the diameter of the rivet.
- Insert the rivet into the appropriate nose piece of the rivet gun.
- Insert the rivet into the pre-drilled hole in your workpiece.
- Firmly press the handles of the rivet gun together until the rivet expands and secures the materials.
- Release the handles to eject the spent mandrel.

Image 5.2: Riveting work steps.
5.2 Rivet Nut Tool Function
Use this function to install rivet nuts, which provide threaded inserts in thin materials. Ensure the correct rivet nut mandrel (M5, M6, M8, 10-24, 1/4-20, or 5/16-18) is installed.
- Select the appropriate rivet nut mandrel and install it onto the tool.
- Thread a rivet nut onto the mandrel.
- Insert the rivet nut into a pre-drilled hole in your workpiece.
- Press the arms of the tool together firmly to expand and set the rivet nut in place.
- Turn the rod (knob) on the tool counter-clockwise to unload the rivet nut tool and release the mandrel from the set rivet nut.

Image 5.3: Instructions for the Nut Gun function.
5.3 Reamer Function
The reamer function allows for enlarging or shaping holes in various sheet materials. Two reaming mandrels (arc/round and rectangle/square) are included for different applications.
- Install the desired reaming mandrel (arc or rectangle) onto the tool.
- Position the reamer over the hole or area to be enlarged/shaped.
- Apply steady pressure and rotate the tool to gradually remove material.
- The reamer is suitable for:
- Aluminum sheet thickness: ≤ 2mm
- Stainless steel sheet thickness: ≤ 1mm
- Galvanized sheet thickness: ≤ 2mm
- Minimum working aperture for reaming is ≥ 13mm.

Image 5.4: Reaming function and material thickness guidelines.

Image 5.5: Arc and Rectangle reaming mandrels.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your Eastvolt EV-BT-501 tool.
- Cleaning: After each use, wipe down the tool with a clean, dry cloth to remove any dust, debris, or metal shavings.
- Lubrication: Periodically apply a light machine oil to moving parts, such as the pivot points and mandrel threads, to ensure smooth operation.
- Inspection: Regularly inspect all components for wear, damage, or looseness. Replace worn or damaged parts immediately.
- Storage: Store the tool and all its accessories in the provided compact carrying case in a dry environment to prevent rust and damage.
7. Troubleshooting
If you encounter issues with your Eastvolt EV-BT-501, refer to the following common troubleshooting tips:
- Rivet not setting properly: Ensure you are using the correct size rivet head for the rivet. Apply firm and consistent pressure to the handles. Check if the rivet is fully inserted into the nose piece and the workpiece.
- Rivet nut not setting or stripping: Verify that the correct mandrel size is used for the rivet nut. Ensure the rivet nut is fully threaded onto the mandrel before insertion. Apply sufficient force to set the nut.
- Mandrel stuck in rivet nut: Ensure you fully turn the rod (knob) counter-clockwise to release the mandrel after setting the rivet nut. If it's still stuck, gently wiggle the tool while turning the rod.
- Difficulty changing mandrels/nose pieces: Ensure no debris is obstructing the threads. Clean the threads and apply a small amount of lubricant if necessary.
- Tool feels stiff: Lubricate all moving parts as described in the Maintenance section.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | EV-BT-501 |
| Dimensions (L x W x H) | 32.49 x 17.5 x 11 cm (12.79 x 6.89 x 4.33 inches) |
| Weight | 2.65 kg (5.84 lbs) |
| Material | Plastic, Metal |
| Rivet Head Sizes | 2.4mm, 3.2mm, 4.0mm, 4.8mm, 6.4mm |
| Rivet Nut Mandrel Sizes | Metric: M5, M6, M8; SAE: 10-24, 1/4-20, 5/16-18 |
| Reamer Mandrels | Arc (Round), Rectangle (Square) |
| Reamer Applicable Material Thickness | Aluminum ≤ 2mm, Stainless Steel ≤ 1mm, Galvanized Sheet ≤ 2mm |
| Reamer Minimum Working Aperture | ≥ 13mm |
9. Warranty and Support
Eastvolt products are manufactured to high-quality standards. For warranty information, technical support, or to inquire about replacement parts, please contact your retailer or the Eastvolt customer service department. Keep your purchase receipt as proof of purchase.
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