Milwaukee 3/4" Titanium Silver and Deming Bit

Drilling large holes in metal or other tough materials can often be a daunting task, and having the right bit can make all the difference. Recently, I had the opportunity to put the Milwaukee 3/4" Titanium Silver and Deming Bit (model 48-89-4640) through its paces. This bit boasts a titanium coating for improved durability, a 135-degree split point for precision starting, and a secure grip shank to prevent slippage in the chuck. With these features in mind, I was eager to see how it performed in real-world applications.

Design and Build Quality

The first thing that struck me about this drill bit was its robust construction. The titanium coating not only gives it a sleek, professional look but also promises enhanced durability. The bit’s 135-degree split point tip is designed to reduce walking, which is a common issue with larger drill bits. This feature ensures a more accurate start and minimizes the need for a pilot hole, although I still found it beneficial to use one for the cleanest results.

The secure grip shank is another thoughtful addition. It has a 3-flat design that fits snugly in the chuck, reducing the likelihood of slippage. This feature is particularly useful when working with high-torque applications where maintaining control is crucial.

Performance

I tested the Milwaukee 3/4" bit on various materials, including mild steel, stainless steel, and thick polycarbonate plastic. The bit performed admirably in most scenarios, but there were some notable exceptions.

Steel

When drilling through mild steel, the bit cut efficiently and cleanly, especially when I used cutting oil and maintained a moderate speed. The split point tip worked as advertised, preventing the bit from wandering and ensuring a precise start. However, I did notice that the bit dulled somewhat quickly after drilling multiple holes. This was somewhat disappointing, especially considering the bit's titanium coating, which is supposed to enhance durability.

For thicker or harder steel, such as A36 steel plates, the bit's performance was less impressive. Despite using cutting oil and a lower RPM, the bit dulled after just a couple of holes. This suggests that while the bit is suitable for occasional use on mild steel, it may not be the best choice for more demanding applications.

Plastic

The bit excelled when drilling through polycarbonate plastic. The split point tip prevented any "creep" across the material, and the bit cut through effortlessly without causing any cracks or chips. This makes it an excellent choice for projects involving tough plastics.

Wood

While the bit is primarily designed for metal, I also tested it on wood. It performed well, producing clean, precise holes. The secure grip shank ensured that the bit stayed firmly in place, even when applying significant pressure.

Durability and Edge Retention

Durability is a mixed bag with this bit. On one hand, the titanium coating does provide some added resilience, especially when compared to non-coated bits. On the other hand, the bit's edge retention leaves something to be desired. After drilling just a few holes in thick steel, the bit's cutting efficiency noticeably declined. This indicates that while the bit is capable of handling occasional heavy-duty tasks, it may not be the best choice for frequent use in demanding environments.

Ease of Use

The Milwaukee 3/4" bit is user-friendly, thanks to its thoughtful design features. The 135-degree split point tip makes starting holes easier and reduces the risk of walking, which is especially useful for larger bits. The secure grip shank ensures that the bit remains firmly in place, even under high-torque conditions. However, it's essential to use the bit at the appropriate speed and with adequate lubrication to maximize its lifespan and performance.

Recommendations

Would I recommend the Milwaukee 3/4" Titanium Silver and Deming Bit? The answer depends on your specific needs.

For occasional use on mild steel, plastic, or wood: Yes, I would recommend this bit. It performs well in these materials, especially when used with proper technique and lubrication. The split point tip and secure grip shank are valuable features that enhance accuracy and control.

For frequent use on thick or hard steel: No, I would not recommend this bit. While it can handle occasional heavy-duty tasks, its edge retention and overall durability are not sufficient for frequent use in demanding applications. In such cases, a cobalt bit or a bit specifically designed for heavy-duty metal drilling would be a better investment.

In conclusion, the Milwaukee 3/4" Titanium Silver and Deming Bit is a well-designed tool with several useful features. It performs admirably in a variety of materials, making it a versatile addition to any tool collection. However, its durability and edge retention could be improved, particularly for heavy-duty applications. If you need a reliable bit for occasional use in mild steel, plastic, or wood, this bit is a solid choice. For more demanding tasks, you may want to explore other options.