![]() M2 Steel. This is HSS characterised by well-balanced toughness, wear resistance and red hardness properties. ![]() The different types of High Speed Steel (HSS) used for DART Twist Drill Bits are listed below: Whilst most of today’s twist drills are made from high speed steel, there are also different types of High Speed Steel and different coatings that you add the High Speed Steel to make it even more durable and hard wearing for when you are drilling through those really tough materials. The move towards High Speed Steel has made a massive different to the durability and effectiveness of the twist drill bit. In comparison, twist drill bits used to be manufactured from general carbon tool steel which will remain a very high hardness at room temperature after quenching and low temperature tempering, but with a temperature between 200°c - 500°c the hardness of the material goes to a level similar to its original softened state and completely loses the ability to cut. High Speed Steel is a high carbon tool steel with a red hardness of around 650°c although this can differ depending on the quality and the amount of tungsten in the material. The majority of modern-day twist drills are made from High Speed Steel. When cutting through materials, especially metal, with a twist drill bit you will find that the substrate and the drill bit will heat up very quickly due to friction, therefore it is important that twist drill bits are made from a material that won’t soften or blunt when the material gets hot. Manufacturing process of the twist drill bit.Īngle and form of the twist drill bit tip.Īll three areas will affect the quality of the cut and durability and longevity of the drill bit. What the twist drill bit has been made from. When looking at the different types of twist drill bits there are 3 areas to consider Accessories for drilling through masonry and concrete will most likely have a hardened tungsten carbide tip for long life and extra durability.Įxamples of these include Masonry Drill Bits and SDS+ or Max Hammer Drill Bits. ![]() They are not used for cutting concrete and masonry, as these substrates will grind the tip of a twist drill bit down very fast and create an inefficient cutting experience. However, their primary use is for drilling through metal. Twist drill bits are used for drilling through anything from wood to plastic to metal products, but not masonry and concrete products. Twist drill bits usually range in diameter size from 1mm – 25mm, although specialist firms may manufacture smaller or larger twist drill bits for specific requirements. Since Morse’s design in 1861, little has changed to the twist drill bit it still consists of two cutting edges at the tip and two flutes (grooves) in the body to allow for swarf clearance. ![]() The design meant that the swarf was drawn away from the cutting end meaning less jamming and a high-quality cut. Morse’s concept was to improve upon the unsuccessful spade drills that were in use at the time. It was based on the simple screw mechanism attributed to Greek mathematician Archimedes (287 – 212 BC). Morse of Massachusetts invented the twist drill bit, and patented it in 1863. 1st Fix Ring Galvanised Plus Nail Boxes.Premium Multi Purpose Drill Bit - Hex Shank.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |