<p class="ql-align-justify">	Every industrial worker understands the importance of right abrasive. The use of right abrasive is very important to get the job done to utmost satisfaction. Improper abrasive will damage the end finish leading to an escalation of cost in term of money, material, labour, and in the eyes of the customer - a dented reputation.</p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify">	When we select an abrasive, the most important aspect to keep in consideration is the size of the Grit. The Grit is the is the material on the abrasive that is used to wear of the unnecessary portion of the product to conform to our use and purpose. It can be of metallic or non-metallic origin and is harder than the material it is used to erode.</p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify"><strong>GRIT MATERIAL
</strong></p><p><strong>
        <img src="https://samsindusneeds.com/public/blog_image/blg-7-2.png">
    </strong></p><p class="ql-align-justify">	The most common and simple type of <a href="https://en.wikipedia.org/wiki/Abrasive" rel="noopener noreferrer" target="_blank">abrasive</a> is the Grit Abrasive. The method of grit abrasive delivery needs to be applied based upon quality and cost. Grit abrasives must be harder than the material being worked on. The abrasive material can be classified as Natural and Synthetic categories. The materials that are used are:</p><p>-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sand: Most commonly used for sharpening tools,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Glass: Used for sharpening,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Flint: Used for common smith works,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Garnet: Used for common smith works and sharpening of tools,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Emery: Used to abrade and polish metals,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Aluminium Oxide: Used for wood and metal works,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Silicon Carbide: Commonly used for wet applications,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Alumina Zirconia: Used in machine grinding purpose, </p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Chromium (III) Oxide: Used for fine grinding,</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Diamond: Used for finishing and polishing hard metals, ceramics and glass; and</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ceramic Aluminium Oxide: Used in high pressure applications.</p><p class="ql-align-justify"><strong>
    GRIT SIZE
    </strong></p><p><strong>
        <img src="https://samsindusneeds.com/public/blog_image/blg-7-3.png">
    </strong></p><p class="ql-align-justify">	The grade or size of the grit is an important aspect to be taken into consideration when deciding the right abrasive for the work in hand. The higher the grit size, the finer the abrasive is and the better finish will be achieved on the end product. The grade of the abrasive starts from Super Coarse to Extra Fine. </p><p class="ql-align-justify">The measurement of the abrading material size or grade is determined by the amount of the abrasive material that can fit through a square inch filter. There are several established standards to determine the grit size. The most commonly used standards are;</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;US CAMI (United States Coated Abrasive Manufacturers institute, now part of Unified Abrasives Manufacturers Association),</p><p class="ql-align-justify">-&nbsp;    European FEPA P-grade (Federation of European Producers of Abrasives). The FEPA system is the same as the ISO 6344 standard</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;JSI (Japanese Industrial Standards Committee), and</p><p class="ql-align-justify">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Micron Grade for fine grits.</p><p class="ql-align-justify">
</p><p class="ql-align-justify"><strong>SURFACE MATERIAL</strong></p><p class="ql-align-justify">To get the work done, the worker needs to use an abrasive that is harder than the material that needs to be worked upon. We will discuss some of the most common surfaces that is commonly used in our day-to-day activities.</p><p class="ql-align-justify">a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>WOOD:</strong> One of the most commonly used and popular material in every-day life, wood can be worked upon using the inexpensive abrasive garnet that comes in medium and fine grit. The best abrasives are Silicon carbide and Aluminium Oxide based ones. Silicon Carbide is a combination of natural and synthetic material, while Aluminium Oxide is a synthetic material.</p><p class="ql-align-justify">b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>METAL:</strong> The metal can be a very difficult material to shape as per our requirements. It can be worked upon with Aluminium Oxide or similarly tough material-based abrasives. It can easily peel off the paint and rust from the metal surface. To smoothen or polish a metal surface, it is advisable to use a natural emery based or similar material that will not leave scratches. For heavy abrasive work, Industrial-duty Aluminium Oxide material - Ceramic is recommended.</p><p class="ql-align-justify">c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>STEEL:</strong> Steel is a favourite for almost every manufacturer. It has many advantages, strength being one of them. It can be worked upon only with tough abrasives alone.</p><p class="ql-align-justify">By understanding your surface material, the worker can make a better and informed decision with regard to the type of abrasive to be used for the job in hand. </p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify">Thank You,</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: 09<sup>th</sup> July, 2022</p><p class="ql-align-justify">&nbsp;</p><p class="ql-align-justify">Information Credits: Wikipedia, Internet</p><p class="ql-align-justify"><br></p>