Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your Milwaukee M12 FUEL 2416-21XC 12-Volt Cordless 5/8 inch SDS-Plus Rotary Hammer Kit. Please read this manual thoroughly before using the tool and retain it for future reference.

This image displays the retail packaging for the Milwaukee M12 FUEL 2416-21XC Rotary Hammer Kit. The packaging highlights key features such as 'M12 FUEL Driven to Outperform', 'Up to 75% Faster Drilling', 'Up to 70% Less Vibration', and 'Up to 2X More Run-Time'. It indicates that the kit includes the rotary hammer, two XC4.0 batteries, an M12 charger, and a contractor bag. The model number 2416-21XC is prominently featured.
Safety Instructions
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep this manual for future reference.
General Power Tool Safety Warnings
- Work Area Safety: Keep work area clean and well lit. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.
- Electrical Safety: Avoid body contact with earthed or grounded surfaces. Do not expose power tools to rain or wet conditions.
- Personal Safety: Stay alert, watch what you are doing and use common sense. Use personal protective equipment such as eye protection, hearing protection, and dust masks.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect 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.
Product Features and Components
The Milwaukee M12 FUEL 2416-21XC Rotary Hammer is designed for efficient drilling in concrete, masonry, and other tough materials. It features a brushless motor for extended life and performance.
Key Features:
- M12 FUEL™ Brushless Motor
- 5/8 inch SDS-Plus Bit Capacity
- Compact and Lightweight Design
- Integrated LED Work Light
- REDLITHIUM™ XC 4.0 Battery Technology for extended run-time
Included Components:
- Milwaukee M12 FUEL 2416-21XC Rotary Hammer
- Two (2) M12™ REDLITHIUM™ XC 4.0 Extended-Capacity Battery Packs
- One (1) M12™ Lithium-ion Battery Charger
- Plastic Carrying Case
Setup
Charging the Battery Pack:
- Connect the M12™ Lithium-ion Battery Charger to a standard electrical outlet. The indicator light will illuminate.
- Slide the M12™ REDLITHIUM™ XC 4.0 Battery Pack onto the charger. Ensure it is fully seated.
- The indicator light on the charger will show the charging status. A fully discharged battery typically charges in approximately 60 minutes.
- Once charging is complete, remove the battery pack from the charger.
Installing/Removing the Battery Pack:
- Installation: Align the battery pack with the base of the rotary hammer. Slide the battery pack into the tool until it clicks securely into place.
- Removal: Press the battery release button located on the side of the battery pack. Pull the battery pack out of the tool.
Installing SDS-Plus Drill Bits:
- Ensure the tool is switched off and the battery pack is removed.
- Pull back the chuck collar on the front of the tool.
- Insert the SDS-Plus drill bit into the chuck, rotating it slightly until it slides fully into place.
- Release the chuck collar. Pull on the drill bit to ensure it is securely locked. A slight amount of play is normal for SDS-Plus bits.
Removing SDS-Plus Drill Bits:
- Ensure the tool is switched off and the battery pack is removed.
- Pull back the chuck collar.
- Pull the drill bit straight out of the chuck.
- Release the chuck collar.
Operating Instructions
Operating Modes:
The Milwaukee M12 FUEL Rotary Hammer features multiple operating modes, typically selected via a mode selector switch:
- Rotary Hammer Mode: For drilling in concrete, brick, and masonry. Provides both rotation and hammering action.
- Drill Only Mode: For drilling in wood, metal, and plastics. Provides rotation only.
Starting and Stopping:
- To Start: Press the trigger switch. The LED work light will illuminate.
- To Stop: Release the trigger switch.
Drilling Tips:
- Always secure the workpiece.
- Apply steady, firm pressure. Do not force the tool.
- For deep holes, periodically withdraw the bit to clear debris.
- Wear appropriate personal protective equipment, including eye and hearing protection.
Maintenance
General Maintenance:
- Regularly inspect the tool for any damage, loose parts, or worn components.
- Keep the ventilation openings clear to prevent overheating.
- Clean the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the tool and battery packs in a cool, dry place, away from direct sunlight and moisture.
Battery Pack Maintenance:
- Do not store battery packs in a discharged state. Recharge them after each use.
- Avoid exposing battery packs to extreme temperatures.
- If not used for extended periods, charge the battery pack every few months to maintain its health.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | Battery pack not inserted correctly or discharged. | Ensure battery pack is fully seated. Charge the battery pack. |
| Reduced drilling performance | Worn or dull drill bit. Battery charge low. | Replace with a sharp SDS-Plus drill bit. Recharge the battery pack. |
| Tool overheats | Blocked ventilation slots. Overloading the tool. | Clear ventilation slots. Allow the tool to cool down. Reduce load during operation. |
| Drill bit stuck in chuck | Debris in chuck or improper insertion. | Ensure tool is off and battery removed. Pull back chuck collar firmly and try to remove. Clean chuck if necessary. |
Specifications
| Specification | Detail |
|---|---|
| Model Number | 2416-21XC |
| Brand | Milwaukee |
| Power Source | Battery Powered |
| Voltage | 12 Volts DC |
| Battery Type | M12™ REDLITHIUM™ XC 4.0 Lithium-Ion |
| Amperage | 4 Amps (Battery Capacity) |
| Maximum Bit Capacity | 5/8 inch SDS-Plus |
| No-Load Speed | Up to 1500 RPM |
| Item Weight | Approximately 5.5 pounds (2.5 kg) |
| Product Dimensions (L x W x H) | 19.5" x 14.4" x 5.4" |
| Material | Metal |
| UPC | 045242330478 |
Warranty and Support
Milwaukee Electric Tool Corporation provides a warranty for this product. For detailed warranty information, including duration and terms, please refer to the warranty card included with your product or visit the official Milwaukee website.
For technical support, service, or to locate an authorized service center, please contact Milwaukee customer service or visit their official website:
- Official Website: www.milwaukeetool.com
- Customer Service: Refer to your product documentation for regional contact information.
Note: Warranty terms and conditions may vary by region. Proof of purchase is typically required for warranty claims.





