Milwaukee Cobalt Drill Bit Set - 29PC

As someone who often finds themselves tackling a variety of projects around the house and in my workshop, having a reliable set of drill bits is essential. Recently, I decided to try out the Milwaukee Cobalt Drill Bit Set, with its promise of durability and precision, particularly for tough metal applications. Here’s my detailed take on this set and how it stacks up.

Design and Build Quality

The Milwaukee Cobalt Drill Bit Set is an impressive collection that immediately stands out with its robust design. The bits are constructed from a cobalt alloy, which is known for its hardness and durability. This makes them particularly suitable for drilling through hard metals like stainless steel and cast iron. The cobalt composition, in this case, M35, ensures that the bits maintain their sharpness for extended periods, even under strenuous use.

One of the first things you’ll notice about these drill bits is the 135-degree split point tip. This design is incredibly effective for precision starting, reducing the tendency of the bit to walk or wander when beginning a hole. This feature becomes particularly handy when working on slick or hard surfaces where accuracy is crucial.

Performance

In terms of performance, these drill bits do not disappoint. During my use, I tested the bits on various materials, including stainless steel, cast iron, and hardwood. The bits tackled each material with relative ease. The hardest material I worked with was a 10-gauge stainless steel sheet, and the bits cut through it efficiently without overheating, thanks to the “chip breaker” groove designed into the larger sizes. This feature is intended to produce smaller chips and reduce heat build-up, and it works quite well in practice.

What’s particularly striking is their ability to stay sharp over prolonged use. With proper maintenance, such as using cutting oil and drilling at the appropriate speed, these bits maintained their edge far longer than standard high-speed steel bits. This longevity makes them an excellent investment for anyone frequently working with tough materials.

Practicality and Ease of Use

While the performance of the bits is impressive, the practicality and ease of use also deserve mention. The set comes in a sturdy, customizable case that securely holds each bit in place. However, I did find the case to be overly tight, making it a bit challenging to remove the smaller bits without using pliers. This is a minor inconvenience but something to be aware of.

On the flip side, the case does keep the bits organized and prevents them from knocking into each other, which can dull their edges. Plus, the case is compact and easy to transport, making it convenient to bring along to job sites or different work areas.

Durability and Edge Retention

The durability and edge retention of these bits are exceptional. Even after numerous uses on hard metals, the bits showed minimal signs of wear. This is a testament to the quality of the cobalt alloy used. However, it’s important to note that cobalt bits, by nature, are more brittle than standard high-speed steel bits. This means they can snap under excessive deflection or improper use. I found that using a drill press or a stable setup significantly mitigates this risk, ensuring a longer lifespan for the bits.

Value for Money

Considering the performance and durability of the Milwaukee Cobalt Drill Bit Set, it offers excellent value for money. While the initial investment may seem steep, the longevity and efficiency of these bits justify the cost. The set includes 29 pieces, covering a wide range of sizes, which is another plus. This variety ensures you have the right bit for almost any job, reducing the need for multiple sets.

Final Thoughts

In conclusion, the Milwaukee Cobalt Drill Bit Set is a powerhouse when it comes to drilling through tough materials. The precision starting tip, excellent edge retention, and overall durability make this set a valuable addition to any toolbox. The bits perform exceptionally well across various materials, provided they are used correctly with appropriate speed and lubrication.

The main drawback is the tight fit of the bits in the case, which can be frustrating. However, this is a minor issue compared to the overall benefits. If you work frequently with metals and need a reliable set of drill bits that can handle the toughest jobs, this set is definitely worth considering.

Based on my experience, I highly recommend the Milwaukee Cobalt Drill Bit Set. Its superior performance, durability, and range of sizes make it an excellent choice for both DIY enthusiasts and professionals. Just remember to use them properly to avoid breakage, and you’ll find they become a trusted tool in your arsenal.