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GENERAL MILLING OPERATIONS

Setup

The success of any milling operation depends, Before setting up a job, be sure that the to a great extent, upon judgment in setting up the job, workpiece, the table, the taper in the spindle, selecting the proper milling cutter, and holding the cutter by the best means under the circumstances. Some fundamental practices have been proved by experience to be necessary for and the arbor or cutter shank are all clean and good results on all jobs. Some of these practices are mentioned below...

 

• Before setting up a job, be sure that the workpiece, table, the taper in the spindle, and the arbor or cutter shank are free from chips, nicks, or burrs.

   

• Do not select a milling cutter of larger diameter than is necessary.

   

• Check the machine to see if it is in good running order and properly lubricated, and that it moves freely, but not too freely in all directions.

   

• Consider direction of rotation. Many cutters can be reversed on the arbor, so be sure you know whether the spindle is to rotate clockwise or counterclockwise.

   

• Feed the workpiece in a direction opposite the rotation of the milling cutter (conventional milling).

   

• Do not change feeds or speeds while the milling machine is in operation.

   

• When using clamps to secure a workpiece, be sure that they are tight and that the piece is held so it will not spring or vibrate under cut.

   

• Use a recommended cutting oil liberally.

   

• Use good judgment and common sense in planning every job, and profit from previous mistakes.

   

• Set up every job as close to the milling machine spindle as circumstances will permit.

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