These often provide a good starting point but can usually be further improved through a small amount of trial and error. There are many resources available to help determine suitable settings for particular material / router bit combinations. Feeds and speeds are usually all set in the programming software that is used to create the machine program. Chips will help by removing the heat produced in the cutting process thus increasing tool life and improving edge quality. One thing to remember is to make chips not dust. This will help you find the best feed rate and RPM for any given tool and material. To obtain the optimum Chipload, you must consider these variables, along with the machine and materials you intend to cut. The feed rate used depends upon a variety of factors, including power and rigidity of the machine, rigidity of part hold-down, spindle horsepower, depth and width of cut, sharpness of cutting tool, design and type of cutter, and the material being cut. There are also several factors to be considered when choosing the proper RPM and feedrate. When material is machined the cutter must revolve at a specific RPM and feed at a specific feedrate to achieve the proper Chipload. Chipload can be defined as the size or thickness of the chip that is removed with each flute per revolution. One of the most important of these factors is the Chipload per Tooth (Cpt). There are certain parameters that must be considered, before setting up any file for cutting if you are to accomplish the finish and accuracy required.
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