Introduction
This manual provides essential information for the safe and efficient operation of your Tecforeman For Milwaukee M12 FUEL 1/2-inch Hammer Drill/Driver, Model 3404-2022. Please read these instructions carefully before using the tool and retain them for future reference. This tool is designed for drilling, hammer drilling, and driving applications, offering powerful performance in a compact design.

Image 1: The Tecforeman For Milwaukee M12 FUEL 1/2-inch Hammer Drill/Driver. This image shows the overall design of the cordless hammer drill/driver, highlighting its compact size and ergonomic grip.
General Safety Instructions
WARNING: Read all safety warnings, instructions, illustrations, and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury.
- Work Area Safety: Keep your work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Avoid body contact with earthed or grounded surfaces.
- Personal Safety: Always wear eye protection. Use hearing protection when operating the tool for extended periods. Dress properly. Do not wear loose clothing or jewelry. Keep hair and clothing away from moving parts.
- Power Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the plug from the power source and/or remove the battery pack before making any adjustments, changing accessories, or storing power tools.
- Battery Tool Use and Care: Recharge only with the charger specified by the manufacturer. Use power tools only with specifically designated battery packs.
Components and Features
Familiarize yourself with the various parts of your hammer drill/driver for optimal use and safety.

Image 2: Labeled diagram of the Tecforeman For Milwaukee M12 FUEL 1/2-inch Hammer Drill/Driver. This image points out key features such as the chuck, speed control, brushless motor, LED worklight, variable speed trigger, battery gauge, belt clip, and premium rubber overmold.
- All-New Chuck: 1/2-inch all-metal ratcheting chuck for maximum durability and bit retention.
- Mechanical Design: Robust construction for demanding applications.
- Two Speed Control: Allows selection between 0-450 RPM for high torque applications and 0-1550 RPM for high-speed drilling.
- POWERSTATE™ Brushless Motor: Delivers powerful performance and extended tool life.
- 400 In-Lbs of Peak Torque: Provides significant power for various drilling and driving tasks.
- LED Worklight: Illuminates the work surface for improved visibility.
- Variable Speed Trigger: Provides precise control over drilling and driving speed.
- Battery Gauge: Displays the remaining battery charge.
- Premium Rubber Overmold: Enhances grip and user comfort.
- Belt Clip: For convenient tool portability.
Setup
Battery Installation and Removal
- To install the battery pack (e.g., M12 REDLITHIUM 2.0Ah compact or 4.0Ah extended capacity), slide it into the base of the tool until it clicks securely into place.
- To remove the battery pack, press the release button on the battery and slide the pack out of the tool.
- Ensure the battery is fully charged before use.
Bit Installation and Removal
- Ensure the tool is switched off and the battery pack is removed before changing bits.
- Grip the rear half of the chuck and rotate the front half counter-clockwise to open the chuck jaws.
- Insert the drill bit or driver bit fully into the chuck.
- Rotate the front half of the chuck clockwise to tighten the jaws securely around the bit. Ensure the bit is centered and firmly held.
- To remove, reverse the process.
Operating Instructions
Selecting Speed
The tool features a two-speed control switch located on top of the tool:
- Speed 1 (0-450 RPM): For high torque applications, such as driving large fasteners or drilling large diameter holes in wood.
- Speed 2 (0-1550 RPM): For high-speed drilling in various materials.
Selecting Mode (Drilling, Hammer Drilling, Driving)
Rotate the collar behind the chuck to select the desired mode:
- Drill Mode (Drill icon): For general drilling in wood, metal, and plastic.
- Hammer Drill Mode (Hammer icon): For drilling into masonry and concrete.
- Driving Mode (Screw icon with torque settings): For driving screws. Adjust the torque collar to the desired setting to prevent over-driving or stripping screws.
Operating the Tool
- Ensure the correct speed and mode are selected for your application.
- Position the tool firmly against the workpiece.
- Press the variable speed trigger to start the tool. The speed increases as you press the trigger further.
- The LED worklight will activate when the trigger is pressed, illuminating the work area.
- Maintain a firm grip and steady pressure during operation.
- Release the trigger to stop the tool.

Image 3: A person demonstrating the use of the Tecforeman For Milwaukee M12 FUEL 1/2-inch Hammer Drill/Driver to drill a hole into a wooden beam. This illustrates the tool in a typical application, emphasizing its compact design for working in tight spaces.
Maintenance
Regular maintenance ensures optimal performance and extends the life of your tool.
- Cleaning: Keep the tool's ventilation openings clear and free of debris. Use a soft brush or compressed air to clean dust from the motor housing. Do not use water or chemical cleaning agents.
- Chuck Maintenance: Periodically clean the chuck jaws to ensure proper gripping.
- Battery Care: Store battery packs in a cool, dry place. Do not store them in direct sunlight or near heat sources. Follow the manufacturer's instructions for charging and discharging.
- Inspection: Regularly inspect the tool for any damaged parts, loose screws, or worn components. Have any damaged parts repaired by a qualified service technician.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start. | Battery not installed correctly or discharged. | Ensure battery is fully seated. Charge or replace battery. |
| Reduced power or speed. | Low battery charge; incorrect speed setting; tool overheating. | Charge battery. Select higher speed. Allow tool to cool down. |
| Bit slips in chuck. | Chuck not tightened sufficiently; worn bit shank. | Retighten chuck firmly. Replace worn bits. |
| Excessive vibration. | Bent or damaged bit; loose chuck. | Replace damaged bit. Ensure chuck is tightened. |
Specifications
- Model: 3404-2022
- Chuck Size: 1/2 inch
- Motor Type: Brushless
- Peak Torque: 400 in-lbs
- Speed 1: 0-450 RPM
- Speed 2: 0-1550 RPM
- Weight (Tool Only): Approximately 2.2 lbs
- Length: Approximately 6.0 inches
- Power Source: M12 REDLITHIUM Battery Packs (not included)
Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.