Milwaukee 2656-20
Milwaukee 2656-20 M18 18V 1/4 Inch Lithium Ion Hex Impact Driver
Model: 2656-20 | Brand: Milwaukee
Product Overview
The Milwaukee 2656-20 M18 18V 1/4 Inch Lithium Ion Hex Impact Driver is a cordless power tool designed for efficient fastening in various materials. It features a robust motor and advanced technology to deliver high torque and speed for demanding tasks. This bare tool is part of the M18 battery system, offering versatility and compatibility with other Milwaukee M18 batteries.
- LED LIGHTING: Keep your work illuminated with the LED lighting array located just below the quick-connect chuck.
- TEXTURED HANDLE: The compact design of this power tool is complemented with the textured rubber grip, which gives you superior handling, even in slippery conditions.
- VARIABLE SPEED TRIGGER: Apply pressure to the trigger to match the amount of power you need on the job. This can drive the motor to create up to 3,450 impacts per minute.
- REDLINK TECHNOLOGY: Electronics inside the impact driver communicate with the M18 batteries that power it to reduce the risk of overheating, which results in more efficient work.
- M18 COMPATIBLE: This cordless Milwaukee impact driver works with the M18 family of lithium ion batteries. Compatible models include the 48-11-1860, 48-11-1850, 48-11-1828, and 48-11-1815, 48-11-1840, 48-11-1820.
Safety Information
Always observe basic safety precautions when using power tools to reduce the risk of fire, electric shock, and personal injury. Read and understand all instructions before operating this tool.
- Wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, and gloves.
- Ensure the work area is well-lit and free of clutter.
- Keep children and bystanders away while operating a power tool.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Always disconnect the battery pack before making any adjustments, changing accessories, or storing the tool.
- Use the correct tool for your application. Do not force the tool.
- Maintain tools with care. Keep cutting tools sharp and clean.
- Store idle tools out of reach of children and untrained persons.
Setup
This product is sold as a bare tool, meaning the battery pack and charger are not included. Ensure you have a compatible Milwaukee M18 Lithium-Ion battery and charger before use.
1. Attaching and Detaching the Battery Pack
- To attach the battery pack, slide the battery pack onto the tool's battery receptacle until it latches securely into place.
- To detach the battery pack, press the release button on the battery pack and slide the battery pack off the tool.
2. Inserting and Removing Hex Bits
- To insert a hex bit, push the bit firmly into the 1/4 inch hex chuck until it locks.
- To remove a hex bit, pull the collar of the chuck forward and pull the bit out.

Figure 1: Front view of the Milwaukee M18 Impact Driver, showing the 1/4 inch hex chuck and LED lighting array.

Figure 2: Side view of the Milwaukee M18 Impact Driver, highlighting the ergonomic handle and battery interface.
Operating Instructions
1. Powering On/Off and Variable Speed Control
The tool is activated by pressing the variable speed trigger. The speed of the tool is controlled by the amount of pressure applied to the trigger. Pressing the trigger further increases the speed and impact rate. Releasing the trigger turns the tool off.

Figure 3: Close-up view of the variable speed trigger and the integrated LED light, which illuminates the work area.
2. Forward/Reverse Rotation
A forward/reverse selector switch is located above the trigger. Push the switch to the left for forward rotation (tightening) and to the right for reverse rotation (loosening). Ensure the switch is in the center position for trigger lock when not in use or when changing bits.
3. Utilizing LED Lighting
The integrated LED light automatically activates when the trigger is pressed, providing illumination to the work surface. This feature is particularly useful in dimly lit environments.
4. Redlink Technology
The tool incorporates REDLINK Intelligence, an advanced electronic system that provides optimized performance and overload protection using total system communication between tool, battery, and charger. This helps prevent damage to the tool and battery under heavy-duty applications.

Figure 4: The Milwaukee M18 Impact Driver positioned on a workbench, ready for use with various screws, demonstrating its application.
Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your Milwaukee Impact Driver.
- Cleaning: Keep the tool's ventilation openings clear and free of debris. Use a clean, dry cloth to wipe down the tool. Do not use cleaning agents that may damage plastic parts.
- Battery Care: Although the battery is not included, proper care of your M18 Lithium-Ion battery packs is essential. Store batteries in a cool, dry place. Do not store them in direct sunlight or where temperatures exceed 120°F (50°C).
- Inspection: Periodically inspect the tool for any signs of damage, loose screws, or worn parts. If any damage is found, have the tool serviced by a qualified repair technician.
Troubleshooting
If you encounter issues with your Milwaukee Impact Driver, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | Battery not charged or improperly inserted. | Ensure battery is fully charged and securely inserted. |
| Loss of power during operation | Battery charge is low. Overload protection activated. | Recharge battery. Reduce load on the tool. |
| Excessive vibration or noise | Loose components or damaged parts. | Stop using the tool immediately and have it inspected by a qualified technician. |
| Bit not holding securely | Chuck mechanism is dirty or worn. | Clean the chuck. If issue persists, seek professional service. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Milwaukee |
| Model Number | 2656-20 |
| Power Source | Battery Powered (M18 Lithium-Ion) |
| Voltage | 18 Volts |
| Drive Size | 1/4 Inch Hex |
| Maximum Rotational Speed | 2750 RPM |
| Blows per Minute (IPM) | 0 to 3450 |
| Max. Torque | 1500 in.-lb. |
| Product Dimensions | 5.69 x 2.93 x 7.85 inches |
| Item Weight | 1.5 Pounds |
| Brushless Motor | No |

Figure 5: A diagram illustrating the approximate dimensions of the Milwaukee M18 Impact Driver.
Warranty Information
Specific warranty details for the Milwaukee 2656-20 M18 18V 1/4 Inch Lithium Ion Hex Impact Driver are typically provided with the product packaging or can be found on the official Milwaukee Tool website. Please refer to these resources for the most accurate and up-to-date warranty terms and conditions.
Customer Support
For further assistance, technical support, or service inquiries regarding your Milwaukee Impact Driver, please contact Milwaukee Tool customer service. Contact information can typically be found on the official Milwaukee Tool website or within the product's original documentation.
You can visit the official Milwaukee Tool website for support resources: www.milwaukeetool.com
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