What Types of HSS Twist Drills Do We Have?
What is a twist drill bit?
The twist drill bit is the one kind of cutting tool used to remove material to produce holes, which are almost always round. They include a cutting point at the tip of a cylindrical shaft with a spiral flute. The flute allows the chips to be removed from the hole. If the twist drills are made of high-speed steel (HSS), we will call it an HSS twist drill bit.
High-speed steel (HSS) is a kind of tool steel. HSS twist drills are harder and more heat resistant than high carbon steel bits. High-speed steel drills have higher cutting speeds than high-carbon steel drills and have primarily replaced carbon steel.
Generally, the HSS twist drills can be divided into HSS tapered shank twist drill, HSS straight shank twist drill, and HSS reduced shank twist drill bit.