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856/894

illsEndM・ Cutting conditions vary with the kind of work piece and change of working conditions. Refer to the table of standard conditions to select proper conditions. ・ The overhang of the holder or the end mill should be as short as ・Avoid dwelling because it may hasten wear of flanks.・It is better to use cutting fluid, if possible. ・Apply a sufficient amount of cutting fluid to the place to be cut.　 In the case of large depth of cut, it is recommended to supply cutting fluid, mist, or air to the place at high pressure during cutting in order to discharge chips.・ Use an end mill holder with sufficient precision and grasping force. In using an end mill with a small mill diameter, select an end mill holder mainly considering deflection. When using an end mill with a large mill diameter or a roughing type end mill, it is important for an end mill holder to have sufficient grasping force.・ Perform re-grinding of a worn-out end mill as early as possible after referring to the following table. There may be cases where, if depth of wear exceeds the limit, wear may proceed so rapidly that re-grinding may become impossible for re-utilization.・ As for carbide end mills, re-grind them when the depth of wear reaches 50% to 60% of the limit value of high speed steel end mills. Generally, it takes more time to re-grind the worn end mill than an unused one.・ Fix the work piece securely. When using an end mill with high helix angle or when performing heavy duty cutting, be careful about shaking of the work piece and slipping of the tool. ・Be sure to use an end mill matching the working purpose. If you ・ It is recommended to use a short flute length type end mill with a large mill diameter and tool stiffness, when you consider cutting ability first. To obtain the maximum feed speed of the table, use an end mill with approximately 15 to 25 mm of mill diameter, because the feed speed is dependent on the feed per tooth. Carry out a detailed study in selecting an end mill in addition to allowance.・ When using hard work material, in the case of large depth of cut, or when using an end mill with long flute length, set the ・ If high dimensional precision or excellent roughness of finished surface is significantly required, or when output of a machine to ・Multi-flute end mills are generally suitable for cutting works requiring high precision. ・Select a machine consistent with the size of work piece to be used. It is important that the machine has enough power and mechanical stiffness to achieve necessary machining precision and machining efficiency. ・ Check whether you can set the machine to the revolution number and feed speed suitable for the end mill to be used. have any question, please make contact with us. Use them as a guide in starting a new work. To select the optimum cutting conditions, take various factors into consideration in addition to the cautions described above :(1) Machine(2) Tooling(3) Selection of an end millSelection of standard cutting conditionsrevolution number to the lower value.be used is low, set the feed speed to the lower value.possible.　Be careful of excessive abrasion because it may cause chipping. (4) WorkG6Precautions in handling an end mill