1. Introduction
Thank you for choosing the CHOKMAX Cordless Rotary Tool. This 3.7V Li-ion mini multi-tool kit is designed for light-duty DIY projects, offering variable speed control for tasks such as polishing, cleaning, engraving, carving, sanding, grinding, and cutting. Its compact and lightweight design ensures ease of use and reduces hand fatigue during extended operation. Please read this manual thoroughly before using the tool to ensure safe and efficient operation.
2. Safety Information
Always follow basic safety precautions when using electrical tools to reduce the risk of fire, electric shock, and personal injury.
- Eye Protection: Always wear safety glasses or goggles to protect your eyes from flying debris.
- Work Area: Keep your work area clean and well-lit. Cluttered or dark areas invite accidents.
- Avoid Hazardous Environments: Do not use power tools in damp or wet locations, or in the presence of flammable liquids or gases.
- Secure Workpiece: Always secure the workpiece firmly to prevent movement during operation.
- Proper Attire: Do not wear loose clothing or jewelry. Keep hair, clothing, and gloves away from moving parts.
- Tool Maintenance: Keep tools sharp and clean for better and safer performance. Follow instructions for lubricating and changing accessories.
- Unplug When Not in Use: Disconnect the tool from its power source (USB cable) before making any adjustments, changing accessories, or storing it.
- Do Not Overreach: Maintain proper footing and balance at all times.
- Use Correct Tool: Do not force the tool. Use the correct tool for your application.
3. Package Contents
Verify that all items are present in your package:
- CHOKMAX Cordless Rotary Tool
- USB Charging Cable
- Storage Box
- 42 Accessories Kit, including:
- Sanding drums (1)
- Sharp diamond grinding burrs (3)
- Aluminium oxide grinding burrs (4)
- Bits (4)
- Felt burrs (1)
- Collets (5)
- Sanding bands (20)
- Felt polishing wheels (2)
- Grinding wheels (1)
- User Manual

Image: The CHOKMAX Cordless Rotary Tool with its complete set of 42 accessories and USB charging cable.
4. Product Overview
Familiarize yourself with the components of your rotary tool:

Image: Detailed diagram showing the Speed Indicator, Power Button, Heat Dissipation Holes, USB Charging Port, Spindle Locking Button, and Chuck.
- Speed Indicator: Displays the current speed setting (5000/10000/15000 RPM).
- Power Button: Turns the tool on/off and cycles through speed settings.
- Heat Dissipation Holes: Ensures proper cooling during operation.
- USB Charging Port: For convenient charging of the internal battery.
- Spindle Locking Button: Used to lock the spindle for easy accessory changes. Do not press when the device is running.
- Chuck: Holds various accessories. Compatible with collets for 1.5mm, 2.4mm, and 3.0mm shanks.
5. Setup
5.1 Charging the Tool
The rotary tool is powered by a 3.7V rechargeable lithium battery. Before first use, fully charge the tool.
- Connect the provided USB charging cable to the USB Charging Port on the tool.
- Plug the other end of the USB cable into a compatible USB power source (e.g., power bank, wall adapter, computer USB port).
- A full charge typically takes approximately 2 hours and provides up to 90 minutes of continuous operation, depending on the speed setting and load.

Image: The CHOKMAX rotary tool being charged using various USB power sources, highlighting its portability and convenience.
5.2 Attaching Accessories
Properly attaching accessories is crucial for safe and effective use. Ensure the tool is turned off before changing accessories.

Image: A four-step visual guide demonstrating how to replace accessories: pressing the spindle lock, unscrewing the nut, inserting the accessory with the correct collet, and tightening the nut.
- Step 1: Press down the Spindle Locking Button and unscrew the black nut at the end of the chuck.
- Step 2: Select the appropriate collet for your desired accessory. Insert the accessory into the collet, then insert the collet and accessory into the chuck. Ensure the accessory is fully seated.
- Step 3: While holding the Spindle Locking Button, screw the black nut back onto the chuck and tighten it securely. Release the spindle locking button.
- Important Note: Different tool accessories require different collets to fit securely. If an accessory feels loose, replace the collet with one that matches the accessory's shank diameter.
6. Operating Instructions
6.1 Power On/Off and Speed Adjustment
The tool features three adjustable speeds for various applications.
- To Turn On: Press the Power Button once. The tool will start at the lowest speed (5000 RPM), indicated by the Speed Indicator.
- To Adjust Speed: Press the Power Button again to cycle through the speeds: 10000 RPM, then 15000 RPM. The Speed Indicator will show the current setting.
- To Turn Off: Press the Power Button a fourth time to turn the tool off.
6.2 General Operation Tips
- Start Slow: Begin with a lower speed setting for delicate work or when you are unfamiliar with the material.
- Apply Light Pressure: Allow the tool to do the work. Excessive pressure can cause the motor to bog down, overheat, or damage the accessory/workpiece.
- Maintain Control: Hold the tool firmly but comfortably. Its lightweight design helps reduce hand strain.
- Ventilation: Ensure the heat dissipation holes are not obstructed during operation.
6.3 Applications
This versatile tool is suitable for a range of light-duty tasks:

Image: Examples of the rotary tool in use for carving, grinding, cutting, drilling, sanding, and polishing different materials.
- Carving: Use appropriate burrs for intricate details on wood, plastic, or soft metals.
- Sanding: Attach sanding bands or discs for smoothing surfaces or shaping small objects.
- Grinding: Utilize grinding stones for sharpening, deburring, or shaping harder materials.
- Polishing: Use felt wheels with polishing compound to bring a shine to various surfaces.
- Cutting: Employ cutting discs for light cuts on thin materials.
- Engraving: Use diamond burrs for detailed engraving work.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your tool.
- Cleaning: After each use, wipe down the tool with a clean, dry cloth. Use a soft brush to remove dust and debris from the heat dissipation holes and chuck area. Do not use harsh chemicals or abrasive cleaners.
- Accessory Storage: Store accessories in their designated box to prevent damage and loss.
- Battery Care: For optimal battery life, avoid completely draining the battery frequently. Charge the tool regularly, even if not in use for extended periods (e.g., every 3-6 months).
- Inspection: Periodically inspect the tool and accessories for any signs of wear or damage. Replace worn or damaged accessories immediately.
8. Troubleshooting
If you encounter issues with your CHOKMAX Cordless Rotary Tool, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not turn on. | Battery is depleted. | Charge the tool fully using the USB cable. |
| Accessory falls out or wobbles. | Incorrect collet size or loose chuck nut. | Ensure the correct collet is used for the accessory's shank diameter. Tighten the chuck nut securely while holding the spindle lock button. |
| Tool stops during operation or runs slowly. | Excessive pressure applied; battery low. | Reduce pressure on the workpiece. Charge the battery. |
| Tool overheats. | Blocked ventilation holes; prolonged heavy use. | Ensure heat dissipation holes are clear. Allow the tool to cool down before resuming use. Avoid continuous heavy-duty tasks. |
9. Specifications
Detailed technical specifications for the CHOKMAX Cordless Rotary Tool:

Image: A table summarizing the product specifications including input voltage, battery type, charge time, use time, weight, load speed, product size, speed settings, collet size, and number of accessories.
| Feature | Specification |
|---|---|
| Brand | CHOKMAX |
| Model Number | AUB07TJ7KF6Q |
| Voltage | 3.7 Volts |
| Power Source | Cordless-Electric |
| Battery Type | 1 Lithium Ion (included) |
| Wattage | 20 watts |
| Maximum Rotational Speed | 15000 RPM |
| Minimum Speed | 5000 RPM |
| Speed Settings | 3 (5000/10000/15000 RPM) |
| Charge Time | Approx. 2 hours |
| Continuous Use Time | Up to 90 minutes |
| Collet Size Range | 1.5mm, 2.4mm, 3.0mm |
| Item Weight | 6.7 ounces (approx. 190g) |
| Sound Level | 30 dB |
| Included Components | Rotary tool, 42 accessories, user manual, USB connector |
10. Warranty and Support
CHOKMAX is committed to providing quality products. While specific warranty details are not provided in this manual, please retain your proof of purchase for any warranty claims. For technical support, troubleshooting assistance, or to inquire about replacement parts, please contact CHOKMAX customer service through the retailer where you purchased the product or visit the official CHOKMAX website for contact information.