However, it’s mainly good enough due to the excellent titanium coating that enhances its strength, durability and protects against heat. We all know the drill bits may get quickly hot while being operational on the metals due to high-speed motion. Titanium is the best drill bit material if we consider drilling plastic, wood, or light metals. This will also eventually result in the worn-off coating, shorter lifespan, less heat resistance. Because they are coated with layers, and once the coating is gone, the drill bits have now lessened much of their heat resistance feature.Īlso, you can’t sharpen the titanium drill bits too much. This narrows down the discussion to one statement: the titanium drill bits have a shorter lifetime than the cobalt drill bits. This also means that after some time, you may lose the advantage of that coating as well. This means that when the drill bits contact other metals or tough surfaces, their coating will start to wear off over time. Features of Titanium Drill Bits: Restoring:Īs we already talked about, the titanium drill bits are made up of steel and coated with Titanium nitride. In general, the titanium drill bits are for softer materials like light metals, wood, or plastic. This shiny gold color is the result of the titanium nitride coating. Other than that, the shiny golden color on the titanium drill bits makes their appearance different from the cobalt drill bits. However, some internal features set them apart. Titanium drill bits, on the other hand, are very much similar to the brother-cobalt drill bits. This chalks down to whether the drilling material is cast iron or softwood these drills work fine. This means that if it’s designed to work well with metals, it can also perform excellent with soft and light materials. Versatility:Īs mentioned above, these drills are very responsive to most of the tough metals. So, they tend to be cheaper in the long run as they are a quality and valued purchase. In simple words, though these cobalt drill bits may sound expensive in the initial run, yet due to zero coating on them, they can be easily restored to their original state. This means they provide longer life periods as they are of the same materials outside as inside.Īpart, the coating doesn’t wear off over time, which means that one can easily use any sharpening method to restore the cobalt drill bits’ brilliant performance, unlike the titanium one, which needs to be replaced after the coating has started to wear off, as this will no longer be better heat- resistant. Unlike the titanium bits, the cobalt drill bits don’t have any actual coating of any material. They allow fearless and confident drilling experience. Most of the tough materials like cast iron or stainless steel are no big deal for these drill bits. They are specially designed to deal with heavy-duty drillings or particularly tougher materials. Talking about the performance of the cobalt drill bits. In other words, it’s a one-time investment that can go ages, unlike the titanium drill bits. However, they are much more durable and longer-lasting than the titanium bits, which means they are worth the price. While talking about the cobalt drill bits’ price, they are priced a little more than the titanium or high-speed steel drill bits. Else we know that the drill bits can easily get hot and are much more prone to shattering/damages at higher temperatures. The cobalt material allows the drill bits to disperse heat easily. This means that they can quickly heat to a great level while drilling metals.Ĭobalt is much heat-resistant in this regard. And as we know that the drill bits have hundreds of RPM. This is a very natural and phenomenal rule of friction that heat will produce whenever two metals will rub against each other. Features of Cobalt Drill Bits: Heat-Resistant: On the other hand, the M42 is a little more brittle and more likely to break due to the greater cobalt concentration. The M35 contains a 5% cobalt ratio, whereas the M42 cobalt drill bits have 8% cobalt.The M35 is known to be better because it can be fearlessly used in drills with a lesser chance of stripping. You will only be replacing them if they break. They won’t lose their coating as they are the same inside out. Therefore, they don’t only drill tough material like stainless steel or cast iron they can also be used on soft metals and wood. Thus this enables them to drill through a number of different materials. These cobalt drill bits are much more versatile as they are designed to deal with tougher surfaces. Normally the two famous cobalt alloys used in the making of drill bits are M35 and M42. It’s a cobalt alloy that contains a ratio of steel and cobalt. It’s much harder to find pure cobalt in nature.
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