CNC drilling a long hole - GIF

CNC drilling a long hole.

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Previously:

https://www.homemadetools.net/forum/...980#post191163
https://www.homemadetools.net/forum/...696#post186313
https://www.homemadetools.net/forum/...298#post185056
https://www.homemadetools.net/forum/...984#post168114
https://www.homemadetools.net/forum/...618#post162904

I want to see the alignment of those holes from the bottom of the workpiece. Betcha it doesn't look like the top.

Quote:

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Originally Posted by nova_robotics

I want to see the alignment of those holes from the bottom of the workpiece. Betcha it doesn't look like the top.

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It was piloted. If it was a gun drill that would be a different level of straight. Perhaps drilled initially with a gun drill and enlarged with the helical drill? The high pressure coolant helps keep them straight to.