Whereby the Cobalt drill bits are more suited for harder materials such as your hard metals or cast iron. Titanium drill bits tend to work better on softer materials, such as soft metals, plastics and wood.On the other hand your Cobalt drill bit is not coated but rather is a metallic alloy that is a mixture between metal and cobalt. Titanium drill bits are made from steel, however they are coated with Titanium Nitride, Titanium Carbonitride or Titanium Aluminum Nitride.Let’s delve a bit deeper and analyze critical differences that I believe are worth noting: Now that you are well aware of the distinct qualities of each drill bit. Read More:> Learn How To Drill Out A Lock Key Differences: Titanium vs Cobalt Drill Bit Making the cobalt drill immune to deformation when used during it’s normal operation. They also have the additional characteristic of being corrosion resistant. Their increased hardness make them fantastic for high speed applications as well. Therefore cobalt drill bits are extremely useful for cutting through hard metal and steel. Cobalt drill bits are a lot tougher in their overall make-up as opposed to titanium drill bits. Now it must be noted that the entire drill bit is not made from cobalt and usually when looking at the entire composition of the metallic alloy you will find a range of about 5% to 8% of Cobalt.ĭue to this metallic alloy characteristic. Unlike it’s titanium counterpart, this drill bit is actually made from a mixture of cobalt and steel, and not just a coating layer like the Titanium drill bits. Cobalt Drill BitĬobalt drill bits are designed to be very hard in their material composition. The TiAlN drill bit is the best amongst the 3 titanium drill bits. What this translates to is the ability to utilize the drill bit at much higher cutting speeds, which in turn increases overall productivity. TiAlN can withstand temperatures up to about 800☌ (1450☏). It usually comes in a grey colored coating and is very well suited for cutting hard metals like steel, brass and bronze. This specific formulation tends to work very well in high speed cutting applications and it has been stated that the TiAlN coating can increase the useful life of the drill bit by up to 10x the usual service life. Generally when applied to a drill bit the coating thickness is about 1 to 4 µm. TiAlN just like the previous two Titanium Nitride and Titanium Carbonitride is a universally applicable coating that is applied all round the drill bit.Īs the elements dictate, it is made from a combination of Titanium, Aluminum and Nitride. Read More:> Find the perfect drill guide to complement your power drill Titanium Carbonitride drill bits generally maintain their physical characteristics up to about 400☌ and can be used for drilling into medium to hard metals as well as softer materials. Its harder overall and it tends to provide a higher degree of wear resistance. What is key to know is that TiCN coating is generally better than Titanium Nitride (TiN) coating. On drill bits the coating layer is usually between 1 to 4 µm in thickness, having a friction coefficient in the range of about 0.2 µm. It generally has a nano-hardness all the way up to about 32 GPA. TiCN is made up of a chemical compound that includes titanium, carbon and nitrogren. In fact various scientific journal and publications have stated that simply applying an additional layer of about 1 – 2 µm of TiN coating, could improve the overall wear resistance and extend the useful life of the drill bit. This entire process leads to an improved microhardness of between 2000 to 2500 HVM and a general reduction in the friction co-efficient of between 0.1 and 0.2. The high speed drill bit undergoes pre and post cleaning to ensure that the metal is hard coated correctly without any blemishes. The Titanium Nitride is generally applied onto the drill bit via the use of a magnetic spluttering system. These qualities have lent it to work extremely well on drill bits as well. TiN has been used industrially to improve the friction, hardness and wear resistance of substrate material for some time. Let’s analyze each of these specific coatings in a bit more detail Titanium Nitride (TiN) There are typically three types of Titanium coatings. This coating provides for many additional enhancements over and above your typical HSS drill bits. The Titanium Drill bit on the other hand is practically steel coated with Titanium. This gives the high speed drill bit it’s characteristic strength and durability. Plus they are made by coupling varying concentrations of different elements such as nickel and chrome into stainless steel. This is part of the family of high speed steel (HSS) drill bits.Īs an intro HSS bits are specifically designed to be heat resistant.
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