Milwaukee Cobalt Drill Bit Set - 23PC

A reliable and durable drill bit set is essential for anyone working with hard metals, and the Milwaukee Cobalt Drill Bit Set - 23PC (model number 48-89-2338) delivers on both fronts. Designed for effective chip removal and reduced heat during use, this set excels in various applications, especially in hard metal tasks. The standout features of this set include its durable design, precise split point tips, and compatibility with Milwaukee's PACKOUT storage solutions.

Upon first inspection, the drill bit set impresses with its thoughtfully designed case. Unlike many plastic cases that feel flimsy and prone to breakage, this one is robust and features real hinges and a secure latch that prevents accidental opening. The case also has a 1/4” x 20 threaded insert on the back, offering additional mounting options for those who might need them.

What caught my attention immediately was the inclusion of multiple bits for the commonly used sizes. This is an essential feature, given that smaller bits tend to be more prone to wear and breakage. The set includes duplicates of 1/16”, 5/64”, 7/64”, 3/16”, and 1/4” sizes, ensuring that you always have a backup ready to go. Larger bits from 3/16” and up feature three flat lobes on the shanks to prevent slipping in the drill chuck, a significant advantage when working with difficult materials.

In practical use, these bits perform exceptionally well. The split point tip is a game-changer for reducing walking, making it easier to start holes precisely even on hard metals like stainless steel. The chip breaker design also enhances performance by minimizing the formation of long metal pieces that can get in the way during drilling. I found that the bits cut through steel, aluminum, and even hardened bolts with ease, leaving clean, precise holes.

One aspect that significantly enhances the durability of these bits is the cobalt steel composition. Unlike bits that rely on a coating for performance, these Milwaukee bits are made entirely of cobalt steel, which extends their lifespan and makes them easier to sharpen when they eventually wear out. The bits maintain their sharpness well over extended use, provided you use the correct drilling technique, including the appropriate RPM and cutting fluid.

During my tests, I drilled through various materials, including mild steel, stainless steel, and even some hard woods and plastics. In each case, the results were consistently impressive. The bits maintained their sharpness and did not overheat, thanks to their effective chip removal design. This feature is particularly beneficial when working with metals, as it helps dissipate heat more effectively, reducing the risk of damaging the bits.

The case, while rugged and well-designed, has a minor drawback. The bit holders pivot out for easier access, but this can be somewhat tricky to manage, especially when wearing gloves. However, this is a minor inconvenience compared to the overall quality and functionality of the case.

Price-wise, the set is on the higher end, but the old adage "you get what you pay for" holds true here. The durability and performance of these bits justify the investment, especially for professionals who rely on their tools daily. The cost of replacing individual bits can add up quickly, making this set a cost-effective choice in the long run.

I have also tested these bits in less ideal conditions, such as drilling without a pilot hole or center punch. Even in these scenarios, the bits performed admirably, drilling clean holes without wandering or chattering. This reliability is crucial for anyone working in demanding environments where precision and speed are essential.

Overall, the Milwaukee Cobalt Drill Bit Set - 23PC stands out as a high-quality, durable option for anyone needing reliable drill bits for hard metal applications. The thoughtful design, durable materials, and practical features make this set a valuable addition to any toolbox. While the price may be a bit steep for some, the long-term benefits and reduced need for frequent replacements make it a worthwhile investment.

In conclusion, I highly recommend the Milwaukee Cobalt Drill Bit Set - 23PC for professionals and serious DIY enthusiasts. Its durability, performance, and thoughtful design make it an excellent choice for anyone working with hard metals. The set's ability to maintain sharpness, reduce walking, and handle various materials with ease ensures that it will be a reliable tool in your arsenal for years to come.