Impact Driver DeWALT DCF850NT, 3250 RPM, 1/4 inch Chuck, 900g

The DeWALT DCF850NT impact driver combines compact dimensions and a high maximum idle speed of 3250 RPM in a tool that weighs approximately 900 g. Designed with a 1/4" chuck and a pistol-style handle, the impact driver runs from a Lithium-Ion battery pack and is intended for fastening and assembly tasks where speed and control are important. Its two-colour housing in black and yellow follows DeWALT’s familiar ergonomic layout while keeping the unit compact for overhead and tight-space work.

Advantages

The tool’s high idle speed and impact mechanism deliver fast screw driving and improved performance compared with manual drivers. At about 0.9 kg, the driver reduces operator fatigue during extended use, and the 1/4" chuck accepts standard bits for rapid changes. Adjustable speed provides control for different materials and screw sizes, and the pistol handle format supports a secure grip and precise positioning.

Suitable for

• Installing decking, framing, and substructures
• Furniture assembly and cabinet fitting
• Mechanical and electrical fastening tasks
• Maintenance and repair work in confined spaces
• DIY projects requiring repeated screw driving

Key specifications

• Maximum idle speed: 3250 RPM
• Chuck type: 1/4" hex chuck for standard bits
• Weight: approximately 0.9 kg
• Handle shape: pistol handle for ergonomic control
• Power source: Lithium-Ion battery (battery not included)
• Adjustable speed: yes
• Colour: black and yellow housing

How to use

Install a compatible 1/4" hex bit into the chuck until it locks. Fit a charged Lithium-Ion battery pack to the tool according to the battery manufacturer’s instructions. Select an appropriate speed setting for the material and fastener size, position the bit on the fastener head, and press the trigger to drive the screw. Release the trigger to stop and withdraw the bit. For removal, reverse the bit orientation if the tool supports reverse operation or use manual extraction as required.

Recommendations

For best results, use sharp, high-quality bits and matched fasteners; choose lower speed settings for delicate materials and higher speed for bulk fastening. Regularly inspect the tool and battery for damage, and follow all safety guidance from the battery and tool manufacturer, including wearing eye protection and securing loose clothing. Store the tool in a dry place and charge batteries according to recommended procedures.