Foundation

Machine vibration during deep hole drilling causes chatter marks on the bore surface and reduces tool life. I have traced most vibration problems to three root causes: foundation issues, worn bearings or drive components, and workpiece resonance. Each cause produces a different vibration pattern, and identifying the pattern is the first step toward a fix. Vibration Diagnosis by Pattern I have learned to recognize vibration patterns by observing the chatter marks on the bore surface and feeling the machine during operation. The following table summarizes the patterns I have encountered and their most likely causes. ...

Installing a deep hole drilling machine is more involved than most other machine tools. The long stroke and high cutting forces require a solid foundation and careful alignment. I’ve been involved in installing several deep hole drilling machines. Getting the foundation and alignment right from the start prevents problems that would otherwise show up in every hole drilled. Foundation Requirements A deep hole drilling machine needs a foundation that absorbs the cutting forces and prevents vibration. The foundation requirements depend on the machine size and weight. ...