Milwaukee Metric Cobalt Red Helix Drill Bit

Milwaukee's Metric Cobalt Red Helix Drill Bit Set, model 48-89-2522, aims to be a go-to solution for tackling hard metals, and it certainly offers some promising features. After putting these bits through their paces, here's a detailed look at their performance, strengths, and areas where they fall short.

Design and Build Quality

The first thing that stands out about these bits is their sturdy construction. Made from cobalt, these bits are designed for drilling through hard metals. The RED HELIX design is another notable feature, intended to enhance chip removal and reduce heat buildup. The bits also feature a 135° split point tip, which promises precise starting and prevents the bit from walking during use.

The bits come in a compact, sturdy case, which is a mixed bag. While the case is robust and keeps the bits secure, the labeling can be confusing. Finding the right bit size quickly can be a bit of a hassle due to the layout. However, the case does a good job of ensuring that bits don't fall out and get lost.

Performance

When it comes to drilling through hard metals, these bits generally perform well but are not without issues. The cobalt material and the RED HELIX design do seem to make a difference in terms of durability and efficiency. I drilled through 17-7 stainless steel and Spring temper 302 stainless steel with relative ease. The bits remained sharp and effective, cutting through the material without overheating or dulling quickly.

For softer metals and materials like wood and drywall, these bits are more than capable. They provide clean, sharp cuts and efficient chip removal. The 3-flat secure grip is a nice touch, preventing the bit from slipping in the chuck, which is particularly useful when using a handheld drill.

Challenges and Limitations

However, it's not all smooth sailing. One of the more significant issues is the inconsistency in performance. While some bits worked exceptionally well, others struggled or even broke during use. For example, drilling through a bolt with the 5/16 bit resulted in the tips of the cutting edge breaking off before I got 1/4 inch deep. This kind of inconsistency is disappointing, especially from a brand like Milwaukee.

Another issue is the difficulty in sharpening these bits once they dull. The factory point design is not easy to replicate, making it challenging to maintain their effectiveness over time. This could be a deal-breaker for those who rely heavily on their drill bits for frequent use.

Usability

The usability of these bits is generally good. The split point tip and RED HELIX design make starting a hole and drilling through material straightforward. The bits don't wander, which is crucial for precision work. However, the aforementioned issues with the case labeling can slow you down when you're in the middle of a project.

For those who are heavily invested in Milwaukee's Packout system, there seems to be some confusion about the compatibility of this drill bit set with the Packout system. Despite claims of compatibility, it's not immediately clear how they integrate, which can be frustrating for users looking for a seamless modular setup.

Durability and Longevity

Durability is a mixed bag with these bits. While some users report excellent longevity, others have experienced bits breaking or dulling quickly. The cobalt material should, in theory, offer extended life compared to black oxide bits, but the real-world results are inconsistent. When the bits do work as intended, they offer a significant advantage in terms of durability and cutting efficiency.

Value for Money

At a higher price point, these bits are an investment. When they perform well, they justify the cost by saving time and effort, especially when working with hard metals. However, the inconsistency in performance and the difficulty in sharpening can make this investment feel risky. If you get a good set, they can be invaluable. If you get a set with issues, the cost can feel unjustified.

Final Verdict

Would I recommend the Milwaukee Metric Cobalt Red Helix Drill Bit Set? It depends. If you're working with hard metals and need a reliable set of drill bits, these could be a good fit, provided you're willing to deal with the potential inconsistencies and the higher price tag. The design features like the RED HELIX and split point tip do offer tangible benefits in terms of performance and precision.

However, if you require absolute consistency and ease of maintenance, you might want to look elsewhere. The difficulty in sharpening these bits and the mixed performance can be significant drawbacks.

In summary, the Milwaukee Metric Cobalt Red Helix Drill Bit Set has the potential to be an excellent addition to your toolkit, especially for tough jobs. Just be aware of the potential pitfalls and weigh them against your specific needs and budget before making a purchase.