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What is a reamer and why is it so important?



There are many types of reamers, including tapered pins and hand reamers. The following refers to high-precision mechanical reamers that use lubricants in lathes or machining centers. Reamer is a precision tool regardless of its use. Its successful manufacturing depends not only on the grinding machine and the operator, but also on the characteristics of the tool itself. The reamer can be produced with cemented carbide, high-speed steel or cermet composite materials.


reaming, essentially the process of reaming. Reamer design is used to make a small amount of hole size amplification, but with high precision, can ensure that the side of the hole has a smooth surface finish. Using reamer correctly, thousands of holes can be expanded to high precision holes without reducing performance.


reamer is currently the most accurate hole machining tool available. if reamer is used in metal machining, it is usually used for H6/H7 high precision tolerance according to ISO standards. ISO and ANSI metric standards both refer to fasteners that can be freely assembled and disassembled.


reamer can not remove a large amount of material. Material removal depends on several factors, including the material to be processed and the size and quality of the pre-drilled hole. For mechanics, this is a process that requires careful balance. To make the reamer work efficiently, it is essential to leave the right margin in the hole. Too much allowance for reamer may be hard to run and holes may deform. Too little allowance reamer will rub and wear, resulting in poor hole quality.


The edge of the reamer needs to have a certain hardness to extend the service life; it also needs to have good toughness so that the tool will not fail during normal use. Proper use and control of a small amount of material balance to ensure a long service life of the reamer and high surface finish of the hole.


In addition, if the workpiece is not firmly fixed when reaming, it may cause chatter, and the finish of the part becomes poor and the cutting edge becomes dull. During reaming, friction and extremely high heat can also cause problems, which means that effective lubrication is not only critical for cooling the tool, but also for extending the life of the reamer. Lubrication can also increase the cutting speed, shorten the production cycle, and can also remove chips, which helps to improve the finish of the workpiece.


The manufacturer can not take any shortcuts because the reamer must be absolutely straight with minimal jerk to produce holes with precise roundness and dimensions, such as a tolerance of -0 / + 0.002mm (.0008 “).