<blockquote><em>We understand! We implement! We serve! Thanks for stopping by! You are at the right place!</em></blockquote><p class="ql-align-justify">A Twist Drill or twist bit is a kind of cutting tool with a cylindrical shape having a deep helical groove running across its body. These bits are used to drill holes in metal, plastic, wood, Concrete, etc and are the most useful and versatile cutting tools. Usage of a wrong <strong>Twist Drill in Bangalore</strong> site, the workman can not only impede his work, but it can lead to monetary loss too. A proper drill bit selection will save not only time and money, but also give the best results.&nbsp;</p><p class="ql-align-justify">The shank, the body, and the drill point are the three most important parts of a Twist drill.</p><ol><li class="ql-align-justify"><strong>Shank</strong>&nbsp;-&nbsp;The upper cylindrical smooth section of a drill that is utilized to grasp and drive the drill is the shank. It has a tapered shape for easy insertion into the keyed or <a href="https://samsindusneeds.com/shop?category=drill-bit" rel="noopener noreferrer" target="_blank"><strong>keyless drill chuck</strong></a> of the drill machine. The top end, known as the tank is mostly flat.</li><li class="ql-align-justify"><strong>Body</strong>&nbsp;- The body of the twist drill is positioned at the bottom end of the drill, running from underneath the shank to the cutting point. It has an upper end with a neck whose diameter is less than the section of the shank above the neck and the rest of the body. </li><li class="ql-align-justify">A flute is a deep groove that often wraps around the bit, providing a way for waste material to exit the hole and is the reason for it to be known as a twist drill. It is a sub-part of the Body.</li><li class="ql-align-justify"><strong>Drill Point</strong>&nbsp;- The cone-shaped sharpened edge is the drill point and consists of the flank face and cutting lips. The main cutting edges do the actual drilling. Even though the variations are minor, long cutting edges outperform short cutting edges in terms of cutting performance.</li></ol><p class="ql-align-justify">The Twist drills available in the market are made of a variety of materials. Let us understand the material, that can be used depending upon the work in hand.</p><ul><li class="ql-align-justify"><strong>Carbon steel Twist drills</strong> are used where very low amount of heat is created during the drilling process. The bits are made from both low and high carbon steel.</li><li class="ql-align-justify"><strong>High-Speed Steel (HSS)&nbsp;Twist drills</strong> have better hardness and resistance to wear and tear. These are used in situation where drilling needs to be done through hard surfaces like steel at very high speed.</li><li class="ql-align-justify"><strong>Cobalt&nbsp;High-Speed Steel (HSS) drill bits</strong> have a small amount of Cobalt to increase its hardness as compared to HSS Bits.</li><li class="ql-align-justify"><strong>Carbide metal drilling bits </strong>are ideal for drilling metals that do not contain Iron, such as aluminium, copper, nickel etc. While Carbide twist drill have a longer life compared to CoHSS bits, they are very expensive too.</li></ul><p class="ql-align-justify">Various experimental results indicate that along with the type of Bit material, the coating and finish affect the cutting performance and life of the bit.</p><ul data-checked="false"><li class="ql-align-justify"><strong>The Bright finish</strong> of is the cheapest option. The finish lacks coatings that lengthen tool life and improve cutting effectiveness.</li><li class="ql-align-justify"><strong>The Black Oxide finish</strong> has a better lubrication over bright finish giving a much better life to the bits. A special heat treatment imparts a black finish to the bit that allows it to handle friction and heat effectively.</li><li class="ql-align-justify"><strong>Titanium Nitrite (TiN)</strong> treatment gives a gold colour to the bit making it corrosion-resistant The HSS drill bits are coated with it to make gives them and extremely high surface hardness levels. The TiN Drill Bits can drill through very hard materials and have very long life.</li><li class="ql-align-justify"><strong>The&nbsp;</strong><a href="https://ruko.de/en/blog/tialn-the-titanium-aluminium-nitride-coating" rel="noopener noreferrer" target="_blank" style="color: windowtext;"><strong>Titanium-Aluminium-Nitride coating (TiAlN)</strong></a>&nbsp;is a chemical compound of titanium, aluminium, and nitrogen. It is a versatile and globally applicable coating with a thickness ranging from 1-4 micrometres. The coating is resistant to heat and oxidation allowing for faster cutting speeds and faster work process.</li></ul><p class="ql-align-justify">A carpenter or a workman using a <a href="https://samsindusneeds.com/shop?limit=12&amp;category=cutting-tool&amp;sub_category=drill-bit" rel="noopener noreferrer" target="_blank"><strong>Twist drill in Bangalore</strong></a> or Mysore or Chennai will need to use the correct bit to get his work finished in time without expending too much. At the same time, his work needs to have a professional finish. There are varied types of Twist drill bits available, but in practise a workman will check the following points before picking his twist drill:</p><ol><li class="ql-align-justify">The point angle located at the head which is the measure between the two main cutting edges. The smaller the point angle, the easier is the centering and lessen the risk of sliding-off. The larger point angle will take less time for tapping but requires higher contact pressure.</li><li class="ql-align-justify">The main cutting edges do the actual cutting after the initial tapping. Longer cutting edges cut better than smaller ones</li><li class="ql-align-justify">The Cut Chisel edge connects the two main cutting edges and is responsible for the entry into material. It exerts pressure and friction that increase temperature and greater power consumption that do no good for drilling work.</li><li class="ql-align-justify">The point cuts and thinning are important for the centering thereby improving tapping. It reduces friction.</li><li class="ql-align-justify">The Groove or flute profile channels the chip out of the hole thereby allowing it to proceed further without stopping. It allows results in better temperature management leading to longer life of the bit. The thickness of the drill core depends on the depth of the groove profile with Flat groove profiles facilitating thicker core diameter and Deeper profiles making smaller core diameter.</li><li class="ql-align-justify">The Core thickness determines the stability with thicker core diameter having better stability. The thicker Cores are suitable for working on harder materials at higher torques. They can resist vibrations and lateral forces. Hand drills use thicker core drills.</li><li class="ql-align-justify">The Guiding chamfers support the guiding path of the twist drill. The quality of the borehole depends on the sharply ground chamfers.</li><li class="ql-align-justify">The Secondary Cutting edge removes chips that remain on the material.</li><li class="ql-align-justify">The Helix or Spiral angle is the twist of the drill bit. A larger helix easily removes soft and long chipping materials while smaller helix angles are good for hard and short chipping materials.</li></ol><p class="ql-align-justify"><span style="color: black;">In conclusion, you can determine your application and the material you want to drill into. Look at which twist drills are offered and compare the respective features and functions you need for your material to be drilled. If you stick to the information in the table, you are well prepared for the purchase of a twist drill.</span></p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify">COMPOSED BY: N. P. Bilash</p><p class="ql-align-justify">DATED: 22<sup>nd</sup> October, 2022</p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify">&nbsp;</p><p><br></p>