![]() ![]() Thin slots can be made by using very thin milling cutters. It is used to make the slot in the workpiece. ![]() The surface should be checked for accuracy after each completed cut.Īlso called slot milling, the width of the cutter is less than the width of the workpiece. A relatively slow cutting speed and a fast table feed should be used for roughing, and a relatively fast cutting speed, and a slow table feed used for finishing. If large quantities of metal are to be removed, a coarse tooth cutter should be used for roughing and a finer tooth cutter should be used for finishing. This practice reduces torque in the arbor and permits more rigid support for the cutter. The milling cutter is positioned on the arbor with sleeves so that it is as close as possible to the milling machine spindle, while maintaining sufficient clearance between the vise and the milling machine column. If a wide area is to be milled, fewer traverses will be required using a wide cut. The choice of milling cutters should be based on the size of the workpiece. Deeper cuts may generally be taken when narrow cutters are used than with wide cutters. For plain milling operations, a plain milling cutter should be used. The holding device should be adjusted so that the workpiece surface is parallel to the table of the milling machine. If the workpiece surface that is to be milled is at an angle to the base plane of the piece, the workpiece should be mounted in a universal vise or an adjustable angle plate. The milling machine table should be checked for alignment before starting to make a cut. For plain milling, the workpiece is generally clamped directly to the table or supported in a vise. The arbor is well supported in a horizontal plane between the milling machine spindle and one or more arbor supports. Generally, peripheral, or plain, milling is accomplished with the workpiece surface mounted to the milling machine table and the milling cutter mounted on a standard milling machine arbor. Milling operations are broadly classified as peripheral milling and face milling: Peripheral Milling. ![]()
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