TCT core drills are made from Tungsten carbide material on their tips. Tungsten carbide is a very hard man material and supposed to be one of the hardest material made by man. TCT core drills are more expensive then HSS core drills but are faster and easy to make bigger holes. There are also different types in TCT core drills. TCT core drills are cheaper for bigger diameter i.e. above 41 mm. They are very efficient for cutting hard material. The chances of tip breakage in TCT core drill is more compared to HSS Core drills. TCT core drills has a disadvantage that it can not be reground. Once the TCT core drill is damaged it has to be thrown away, it can not be re used like the HSS core drills. It is always recommended by manufacturers to use TCT core drills only for larger diameter and for very hard material, while giving priority to HSS core drills because of its price and re-sharpening advantages.

 

TCT Standard

 

A Standard TCT core drill is a with tungsten carbide tips. These types of core drills are now available in vast range of diameter, for up to 150 mm. These are popularly used core drills on magnetic core drilling machines. These core drills are popularly used to drill materials like railway tracks, structural steel,stainless steel, cast iron, etc.

 

TCT with hard coating

 

The TCT core drills with hard coating are core drills with a coating on it, generally TiN coating. This makes the core drills more resistant to heat, longer tool life and even removal of chips just like the advantage of HSS core drill. The biggest advantage of hard coated core drills is that these cutters are very good for cutting larger diameters on hard material. These core drills are popularly used to drill materials like corroded or weathered material, structural and stainless steel.

 

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