MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
Remedy - Check for rocking or movement, and correct by proper
Cause - Improper ground cutting tool.
Remedy - Replace or regrind the tool.
Cause - Hard spot at the splice of the drive or the worm belts.
Remedy - Replace the belts.
Cause - Spindle quill worn in the quill head.
Remedy - Tighten the quill head lock slightly.
Cause - Incorrect spindle speed, table feed, or both.
Remedy - Ordinarily, increase the spindle speed and/or increase or
decrease the feed to break up the vibration period. Experiment by using the
hand feed to feed the table.
Cause - Drive pulleys are worn in the grooves or loose on the
Boring or Milling Out Of Square Or At An Angle
Cause - The head is not properly aligned with the table.
Remedy - Check the head for alignment and correct.
Cause - Work improperly set up; i.e., not square or flat.
Remedy - Check and re-align the work.
Failure To Hold The Center Distance When Locating For Boring.