<p>Reamers are cylindrical or conical shaped rotary tools with one or more teeth and are used to remove a thin layer of material from the surface of a machined hole. These rotary finishing tools are designed to slightly enlarge the size of a drilled hole, but with high precision, ensuring a smooth surface finish on the inside of the hole. When properly used, the reaming tool can cut nearly 30,000 holes to high-precision without compromising performance during its lifetime.&nbsp;</p><p>There are many types of reamers, including Machine tool reamers and Hand reamers. High-precision mechanical or machine reamers are used in lathes or machining centres. The Machine reamer is a precision cutting tool, but its precision depends on the machine, the operator's ability to operate the machine, and the functional characteristics of the tool itself. The reamers are usually made carbide, high-speed steel, or metal-ceramic composite-based tools.</p><h2>Understanding a Reamer</h2><p>All Machine reamers are provided with longitudinal flutes or grooves that may be parallel to the axis or right or left hand helical commonly known as teeth. These teeth help in removing thin layer of material from the machined surface of the hole and also function as grooves to accommodate the removed chips. The cutting edge includes a chamfer of 45 degree for usage in lathes and screw machines. Machine reamers can only remove a very small amount of material, usually only about 0.005 to 0.008 inches, so are ideal for producing a high-quality finish on hole surfaces.</p><p>Although the machine reamers are more commonly used for machining cylindrical holes, the tapered reamer is also used to machine a tapered hole; but this is quite rare. The reamers can be used for either straight shank reaming or taper shank reaming.</p><p>Just like the other cutting tools like <a href="https://samsindusneeds.com/shop?limit=12&amp;category=cutting-tool&amp;sub_category=drill-bit" rel="noopener noreferrer" target="_blank">twist drills</a>, there are two categories of materials used to build reamers:&nbsp;</p><p>⦁	Heat treated materials are composed by different steels, most notably plain carbon (unalloyed, considered obsolete today) and high-speed steels.&nbsp;</p><p>⦁	The most common hard material is tungsten carbide (solid or tipped), but reamers with edges of cubic boron nitride (CBN) or diamond also exist.&nbsp;</p><h2>A Reamer in Action</h2><p>The reamer removes a thin layer of material from the surface of a machined hole. The amount of material removed depends on several factors, including the material to be machined and the size and quality of the pre-drilled holes. For the machine reamer to work efficiently, it is of utmost importance to have the correct allowance in the hole. Too much allowance and the reamer may struggle to cut and the hole may be deformed. Too little allowance and the reamer will rub and wear, resulting in poor hole quality.</p><p>The diameter tolerance of the reamer directly affects the dimensional accuracy of the machined hole, the manufacturing cost, and the service life of the reamer. While the reamer is in use, due to the radial runout of the cutter teeth, the amount of reaming, and the cutting fluid, the aperture will be larger than the diameter of the reamer. This is called reaming expansion. At the same time, because the blunt radius of the blade squeezes the hole wall, the hole will recover and shrink. This effect is called reaming shrinkage. Reaming with a high-speed steel reamer generally results in expansion, while reaming with a carbide reamer generally results in shrinkage. This shrinkage that results is usually is greater when reaming thin-walled holes. The nominal diameter of the reamer is equal to the nominal diameter of the hole. By understanding the effects of expansion and contraction, and allowing for the necessary wear tolerance, the upper and lower deviation of the reamer can be determined.</p><h2>Caring for a Reamer</h2><p>Some of the other factors that affect the life of a Reamer are:</p><p>⦁	The hardness of the cutting edge of the reamer that prevents it from failing during normal use,</p><p>⦁	Proper use of the cutting tool,</p><p>⦁	careful selection of the proper tool for the material being machined,</p><p>⦁	close control of the allowance to ensure long reamer life and a high-quality hole finish,</p><p>⦁	Also, if the workpiece is not held securely when reaming, chattering can result, the finish of the part will be poor and the cutting edge will become dull, and</p><p>⦁	Effective lubrication to prevent extreme friction and heat. Friction and heat can cause problems during reaming. Lubrication improves cutting speed, reduces cycle times, and removes chips, helping to improve the finish of the workpiece.</p><p>The most important design element that affects the reaming accuracy, surface roughness, chip space, and tooth strength is the number of teeth it has. The value of the <a href="https://samsindusneeds.com/shop?limit=12&amp;category=cutting-tool&amp;sub_category=tap" rel="noopener noreferrer" target="_blank">Machine reamer in Bangalore</a>, supplied by <a href="https://samsindusneeds.com/shop" rel="noopener noreferrer" target="_blank">samsindusneeds.com/shop</a> is generally determined by the diameter of the reamer and the material of the workpiece. When the diameter of the reamer is larger, a larger number of teeth can be selected. When machining ductile materials, the number of teeth should be smaller. When processing brittle materials, a larger number of teeth is preferable. To facilitate the measurement of the diameter of the reamer, the number of teeth should be an even number. For holes ranging in diameter from 8~40mm, the number of teeth is generally 4~8.</p><p>We at <a href="https://samsindusneeds.com/" rel="noopener noreferrer" target="_blank">www.samsindusneeds.com</a> will advise you to operate the reamers at slower speeds as slow speed affects the productivity and high speed causes the material to snag to the edges and lands of the reamer, resulting in dulling of the edges and holes. Also, it should be noted that highly fine feeds are responsible for causing excessive wear due to reamer cut whereas high coarse feeds tend to produce spiral marks or wavy finish.</p><p><br></p><p>In conclusion, we will recommend you to follow good practise for a longer life of your tools.&nbsp;</p>