I have read a couple times (on this forum) that loosening set screws on a boring bar can sometime cure stubborn chatter issues.
I have a very sturdy setup with a 3/4" bore bar with less than 3x stickout. We struggled with a persistent chatter issue that could not be cured with any combination of speed, feed or DOC. So, when I setup the same part again yesterday, I decided to try loosening all but the first set screw on the tool holder block.
100% fixed. Not only that, but I have varied the parameters wildly and now I cannot generate chatter with any conditions. So, I went to very heavy roughing passes and an ideal finish pass for a fast, perfect results on every part.
Simple solutions are not always intuitive.
Thanks to the random comments in prior posts for putting this idea in my head.
I have a very sturdy setup with a 3/4" bore bar with less than 3x stickout. We struggled with a persistent chatter issue that could not be cured with any combination of speed, feed or DOC. So, when I setup the same part again yesterday, I decided to try loosening all but the first set screw on the tool holder block.
100% fixed. Not only that, but I have varied the parameters wildly and now I cannot generate chatter with any conditions. So, I went to very heavy roughing passes and an ideal finish pass for a fast, perfect results on every part.
Simple solutions are not always intuitive.
Thanks to the random comments in prior posts for putting this idea in my head.