- Jan 24, 2015
I should add that the reason that I go to the total depth (b) in my CAM software is that I set my tool offset to the tip of the tool, using a height gage. The tool offset table in Mach 3 goes to the tip of the tool.In my experience, drill depth is usually specified to the shoulder (a). SolidWorks goes to "a". My CAM program can go to either although I usually choose to go to "b".
I uglified a part the other day by getting this wrong. I carefully calculated the maximum depth not to break through and then drilled to the shoulder instead of to the point. Didn't actually hurt anything, but I meant that to be a blind hole.Back in the day, many light years ago. I recall the V bottom as total depth. In this way, regardless of the angle on the bit. The total hole depth is controlled. You don't want to be drilling where you don't belong!...Good Luck, Dave.
drill baby drillThank you all for your responses. The drawing I am working off of (a steam engine kit) does not specify shoulder or full depth (A or B), so I thought there might be a convention. It seems like maybe there isn't. I guess I will go to B, and if it is not deep enough go to A.
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