Originally Posted by
Bendak
Since I only have access to what my university has (CNC lahtes and mills, etc (but no gun-drill)), I think I resort to buying the pipe and then machining it from there with the threads either welded or brazed on. The borer has to be straight enough not to get stuck in the tree which is probably fairly loose in terms of tolerances, perhaps even +/- 0.5-1mm. This is really just a school project for a club I am in. I would rather buy the stock and machine it myself then pay over $600 for a real 28"+ increment borer.
Thanks,
Jack Ruddat