I'm wondering what the max size is for practical use on a Jet 1640 lathe. I would like 5 or 6 inches but I'm having trouble finding them in that size.. the object is cookie/candy jars with the bark left on..
Time factor.. I have some very nice bowl gouges but would like to bore the jars out as large as possible, first.. the largest I see in a quality Forstner is about 3.5 inchesI don't know how big you can find but I am sure that they would be very expensive. Why not just use s bowl gouge?
Have you considered metal-work style boring bars or fly cutters?Time factor.. I have some very nice bowl gouges but would like to bore the jars out as large as possible, first.. the largest I see in a quality Forstner is about 3.5 inches
Darkmoor is a business and this will be production work
I think that we are talking a maximum thickness of 5-6". Is that right?
If so maybe just use a Forster Bit say up to 2".
The use carbide square insert tools to widen hole say 1/4-3/8" at a time. Come straight in from the end grain. Should not take too long.
You really have to be tight at the chuck. Seems that the size of the hole would be limited by strength of the wood, how thin, does it have checks, how dry?
I have made hollow columns that 4" long and 5" diameter in such manner.
Not too mention a large drill press to spin it, a harbor freight belt driven jobber wouldn't do it.....These people http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/forsbit.htm carry a 4" but chucking would present a problem. If you could remove it from the lathe and than bore on a drill press that would be ideal. You would want to run at very low rpm's.