Milwaukee SHOCKWAVE 5PC Metric Impact Drill Tap Set

The Milwaukee SHOCKWAVE 5PC Metric Impact Drill Tap Set, model 48-89-4875, is an intriguing addition to any tool enthusiast's collection. Designed for drilling and tapping metal up to 1/4" thick, this set promises to save time and effort by combining two essential tasks into one seamless operation. After putting this set through its paces, I've found both strengths and weaknesses that are worth discussing.

Design and Features

The first thing that stands out about this set is its thoughtful design. Each bit in the set features a laser-etched size marking, making it easy to quickly identify the bit you need. The 1/4" quick-change hex shank is a convenient addition, allowing for rapid bit changes and compatibility with both impact drivers and drill drivers. The set includes five sizes: 8-32, 10-24, 10-32, 12-24, and 1/4-20, which are among the most commonly used sizes for machine screws.

One of the key features of these bits is the countersink, which adds an extra layer of convenience. The countersink allows you to create a perfectly flush finish, which is particularly useful when working on projects that require a professional touch.

Performance

When it comes to performance, these bits have proven to be a real time-saver. The ability to drill and tap in one step significantly reduces the amount of time spent on projects, especially when you have multiple holes to drill and tap. I tested these bits on various materials, including mild steel, aluminum, and even plastic, and they performed admirably in most cases.

In steel up to 1/4" thick, the bits cut cleanly and efficiently. The drilling portion of the bit works quickly, and the tapping section follows through smoothly. However, it's crucial to manage the speed and pressure correctly. Using an impact driver, the bits engage and tap the material with a level of precision that's hard to achieve with separate drill and tap operations.

Ease of Use

The set is user-friendly, but there are some caveats. While the bits work well in both impact drivers and drill drivers, I found that using an impact driver provides better control, especially when the tap section engages the workpiece. The incremental rotary motion of the impact driver slows down the advancing tap, reducing the risk of over-tapping or damaging the threads.

That said, using the bits in a standard drill motor requires a bit more finesse. The rapid advancement of the tap can lead to countersinking too deeply if you're not careful. This is particularly true when working on vertical panels where lubrication is challenging. In these scenarios, the impact driver is the better tool for the job.

Durability

Durability is a mixed bag with these bits. While they perform well under optimal conditions, they are not invincible. The bits are quite rigid and can break if subjected to excessive bending or improper use. For instance, drilling at an angle or applying uneven pressure can lead to breakage. This is especially true when working with thicker materials or tougher metals.

On the flip side, the bits hold up well when used correctly. They cut clean threads and can handle multiple uses without significant wear, provided you use cutting oil to keep them cool and reduce friction. The bright finish on the bits is also a nice touch, although it doesn't significantly impact performance.

Areas for Improvement

No tool is perfect, and this set has its drawbacks. One of the most glaring omissions is the lack of a 6-32 tap, which is a common size for electrical work. Including this size would have made the set more versatile, especially for electricians and DIY enthusiasts.

Another area for improvement is the storage. The set doesn't come with any sort of case or holder, which makes it easy for the bits to get lost or damaged in a tool bag. A simple rubber holder or a small case would go a long way in keeping the bits organized and protected.

Lastly, the laser etching, while helpful, could be more pronounced. The markings are small and can be hard to read, especially for those with older eyes. Deeper and bolder etching would make size identification quicker and easier.

Final Thoughts

The Milwaukee SHOCKWAVE 5PC Metric Impact Drill Tap Set is a valuable tool that offers significant time savings and convenience. Its ability to drill and tap simultaneously makes it a must-have for anyone who frequently works with metal. The design is thoughtful, and the performance is generally impressive, especially when used with an impact driver.

However, the set is not without its flaws. The durability could be better, and the lack of a 6-32 tap is a missed opportunity. Additionally, the absence of a storage solution and the small size markings are minor but notable drawbacks.

Would I recommend this tool? Yes, but with reservations. If you frequently drill and tap holes in metal and are looking for a way to streamline your workflow, this set is a fantastic addition to your toolkit. Just be mindful of its limitations and use it appropriately to get the best results. For those who only occasionally need to drill and tap, the convenience may not outweigh the potential issues with durability and storage.