Drill bit DeWalt DT4640-QZ, diameter 16 mm, length 380 mm, working length 280 mm, 1 pc

DeWalt DT4640-QZ 16 mm drill bit with a total length of 380 mm and a working length of 280 mm is a single-piece long-reach cutting tool designed for drilling tasks that require extended depth. The bit is intended for use with compatible handheld or bench drills and holders and is suitable for applications in wood, metal and general construction where a 16 mm diameter tool and extra reach are needed.

Advantages

The long 380 mm overall length and 280 mm working length provide increased reach for drilling deeper holes without changing tools. The single-piece design offers rigidity and reduces wobble compared to extension plus bit combinations. The 16 mm diameter delivers a balance between fast material removal and manageable torque demand on typical power drills. The bit is suitable for repeated on-site drilling tasks and can be used with common drill chucks that accept its shank.

Suitable for

• Drilling deep holes in timber and laminated wood panels
• Piercing sheet metal and thin structural steel where a 16 mm hole is required
• General construction drilling tasks requiring extended reach
• Workshop and on-site applications with compatible drill chucks and holders

Key specifications

• Diameter: 16 mm
• Total length: 380 mm
• Working/cutting length: 280 mm
• Quantity: 1 piece
• Intended materials: wood, metal, general construction materials

How to use

Secure the drill bit in a compatible drill chuck or holder, ensuring the shank is clamped firmly and runs true. Select appropriate drill speed and feed for the material being drilled — lower speeds for metal, medium to higher speeds for wood — and apply steady pressure while allowing the bit to cut. For deep holes, periodically withdraw the bit to clear chips and reduce heat build-up. Use appropriate personal protective equipment and follow the drill manufacturer's instructions for safe operation.

Usage recommendations

For best results, match drill speed and feed to the material, clear chips regularly when drilling deep holes, and use cutting lubricant when drilling metal to extend tool life. Verify chuck compatibility and clamping before operation to maintain concentricity and reduce vibration.