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35314Re: [MILL_DRILL] how to drill deep holes

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  • Rick Sparber
    Feb 2, 2014

      Just starting an interesting thread. 



      On Feb 1, 2014, at 2:18 PM, Corey Renner <vandal968@...> wrote:

      what are you trying to accomplish?


      On Sat, Feb 1, 2014 at 1:55 PM, Rick Sparber <rgsparber@...> wrote:

      This is a spin off thread from one on reaming deep holes.


      I suppose I could turn the shank down, turn an extension with an OD slightly smaller than the hole, and pin the two together. Never done it.


      I know there are gun drills that can drill very straight holes of any depth but that is way beyond my tool set. It takes a lot more than just a different drill bit:




      In some cases, it would be possible to mill a slot and then close up the top. Then you could get a boring bar in there to round it out.


      What do others do?





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