DEWALT Drill Tap Review: A Comprehensive Analysis of the UNC, 1/4-Inch (DWADT1420)

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DEWALT Drill Tap Review: A Comprehensive Analysis of the UNC, 1/4-Inch (DWADT1420)


In this unbiased review, I will provide a comprehensive analysis of the DEWALT Drill Tap, specifically the UNC, 1/4-Inch (DWADT1420) variant. As an expert in the field, I have extensively researched and tested various drill taps, and I aim to provide you with an objective assessment of this product’s features, performance, and potential drawbacks.

Features and Functionality

The DEWALT Drill Tap offers a unique combination of drilling and tapping in one application, making it a convenient tool for various projects. With its ability to drill and tap holes simultaneously, it saves time and effort, eliminating the need for separate tools and steps.

Efficiency and Versatility

One of the standout features of the DEWALT Drill Tap is its speed tip, which allows it to drill through materials quickly. This is especially advantageous when working with metals or other hard surfaces. Additionally, the hex shank of the drill bit is specifically designed for Impact Drivers, ensuring compatibility and optimizing the tool’s performance.

Pros and Cons

Like any tool, the DEWALT Drill Tap has its pros and cons. On the positive side, users have reported that it works well at low screw speeds and provides efficient drilling and tapping capabilities. The ability to deburr and countersink in one step is also appreciated by many. However, it is important to exercise caution when tapping through metal, as some users have experienced the tap bottoming out and snapping off. Additionally, it is recommended to drill a pilot hole first and use cutting oil regularly to reduce the risk of fracture.

Can the DEWALT Drill Tap be used for blind holes?

No, the DEWALT Drill Tap is not suitable for blind holes. If it bottoms out in a blind hole, it may snap off and potentially cause damage. It is advisable to use this tool for through holes or consult alternative options for blind hole applications.

What precautions should be taken when using the DEWALT Drill Tap?

To ensure optimal performance and reduce the risk of tool breakage, it is recommended to drill a pilot hole before using the drill tap. Additionally, using cutting oil regularly throughout the tapping process can help prevent fractures. It is also important to keep the RPM of the driver low, as higher RPM increases the torque and may lead to snapping.

Is the DEWALT Drill Tap suitable for tapping aluminum?

While the DEWALT Drill Tap has been reported to work well with various materials, some users have experienced difficulties when tapping aluminum. It is advisable to drill a hole first before tapping aluminum to reduce the load on the tool. Alternatively, considering a dedicated 1/4″ drive impact tap without the drill component may be a more suitable option for aluminum tapping projects.

How long does the DEWALT Drill Tap last?

The lifespan of the DEWALT Drill Tap can vary depending on the specific project and usage. Some users have reported using it for more than 50 holes before experiencing any issues, while others have encountered breakage after a few uses. It is always a good idea to have spare drill taps on hand to ensure uninterrupted work.


  • Drills and taps hole in one application
  • Deburr and countersink in one step
  • Hex shank of drill bit – Designed for Impact Drivers
  • Speed Tip – Drills material quickly
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