- 21 Feb 2009
- Reaction score
- West Yorkshire
I/We have drifted from the original post somewhat.A very long time ago (in the workshop where I taught) I had a hollow centre that fitted in T rest, for drilling the up the middle of table lamps and we used a shell bit, as you say about 30" long. History now. I don't have a hollow centre or long shell bit and I haven't seen either in a long while. Do you know who I might supply them? I don't remember that the holes were particularly precise either, which didn't matter as we only had to thread the lead down it, not the reasonably tight fit of the piston of a slide whistle. I think I'll get some of the long bits recommended further up the correspondence and take a bit more care clearing the shavings.
However long hole boring bits and pieces are available from Turner's Retreat and Axminster. A friend used to make long hole boring bits by welding extention bars to the blunt end of jobbers twist drills. Tailstock end support can be fashioned from tapered bearings and plywood.