When it comes to the material twist drill bit, the first thing one may think of is high-speed steel, white steel and cobalt containing high-speed steel. The second is the cemented carbide. It is true the alloy and high-speed steel are two most commonly used types of twist drill. Which specific brands are the most commonly used twist drills among a wide range of high-speed steel materials?
Let’s start with the top-line material- M35. The hardness of M35 is HRC64-68, it is designed for drilling stainless steel. If you plan to buy 6542, we suggest M35. Although the price of M35 is higher than 6542, it is worthy.
Then, we come to the material 6542. It is suitable for drilling iron, aluminum and other metals, as well as various soft materials such as wood and plastics. Within the scope of application, the quality of material 6542 is in the upper level with good durability.
Another material is 4341. This material is suitable for drilling low and medium hardness metal.
The most common material is 4241. Its hardness is HRC58-60. It is for DIY marketing, suitable for drilling wood, plastic and soft metals. Within the scope of application, the quality is fairly good and nice choice for wholesale sales in hardware stores.
The above four high-speed steel materials from high-end to low-end are basically the most common high-speed steels for twist drill bits. However, in addition to the above four, there are two very high-end high-speed steel materials, M42 and powder high-speed steel.
References
1) https://www.jichuang.net/news/show-6182.html
Post time: Sep-24-2021