10 Tips & Tricks To Minimize Boring Issues When boring, vibration or chatter is a persistent problem. Whether it is chatter or issues with tool life and hole precision, or anything else, boring can appear to e a challenging task. But boring shouldn’t be more difficult than any other kind of machining if the appropriate rules are followed. Let’s explain several methods for making boring an easy task, regardless of how deep the hole may be, as well as for extending tool life and improving hole accuracy. But first, let’s discuss the type of tooling materials you need for your application.
The appropriate tool materials A boring bar’s useful range is determined by the length to diameter ratio. Also, boring bars can be created from a variety of materials, which alters the qualities of the bar. •
A typical steel boring bar’s effective length to diameter ratio is 3 to 1. Ratios of 4 to 1 or even 5 to 1 are feasible, but usually only after much experimentation.
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On the other hand, a carbide boring bar’s effective length to diameter ratio is 6 to 1. Again, experimentation opens the door to higher ratios. As a general rule, the deeper you can bore without problems, the more money you spend. A carbide bar often costs two to three times as much as a steel boring bar. Carbide is very rigid compared to steel, which is relatively flexible. Like the steel bar, the inclination to chatter is defeated by sheer stiffness.
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Finally, in the case of dampened boring bars, as the bar enters the cut, internal systems passively absorb any incoming chatter. Imagine grabbing a tuning fork, which immediately causes the fork to cease oscillating.