Drill bit DeWALT DT4947-QZ, 151 mm length, for metal, pack of 5

DeWALT DT4947-QZ drill bits, 151 mm length, pack of 5, are high-speed steel bits engineered for drilling metal. Each bit in the set is manufactured to deliver consistent length and reliable performance when working with high-alloy steels and other metals. The bits feature a "no-walk" tip for straightforward penetration on surfaces 5 mm and thicker, recessed cutting wings for cleaner, burr-reduced holes, and a three-sided shank that prevents slippage in standard chucks.

Advantages

The short high-speed steel construction ensures durable cutting performance in metal applications and maintains edge life under professional use. The no-walk tip provides accurate starts without the need for center punching in many situations, reducing drift and improving hole placement. Recessed cutting wings minimize burr formation for smoother holes and easier post-drilling cleanup. The spin-proof three-sided shank improves grip in both portable and stationary drills, reducing cam-out and enhancing operator control.

Suitable for

• Portable and bench drilling of high-alloy steels and metal components
• Fabrication, repair and maintenance tasks in workshops
• Drilling metals with tensile strength up to approximately 1100 N/mm²
• Applications requiring consistent bit length and burr-reduced holes

Key specifications

• Length: 151 mm
• Material: high-speed steel (HSS)
• Tip design: no-walk tip for accurate starts
• Cutting geometry: recessed cutting wings for reduced burrs
• Shank: three-sided, anti-slip shank for improved chuck grip
• Pack quantity: 5 bits

How to use

Select the appropriate bit from the pack and clamp it securely in the drill chuck, ensuring the three-sided shank seats correctly to minimize slippage. Mark the drilling position; for best accuracy on very thin or delicate surfaces consider using a pilot punch or center punch if needed. Begin drilling at moderate speed to establish the hole using the no-walk tip, then adjust speed and feed according to material thickness and hardness. Use cutting fluid or lubricant when drilling harder or high-alloy steels to extend bit life and reduce heat. Withdraw the bit periodically to clear chips when drilling deep holes.

Usage recommendations

For optimum results when drilling steels near the specified tensile strength, use appropriate cutting fluid and moderate drilling speeds. Verify drill chuck compatibility with the three-sided shank before use. Inspect bits for wear and replace when cutting performance declines to maintain hole quality and safety.