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On 2/24/18 7:00 AM, Troy wrote:
Hi VDG'ers,
How do you guys make holes in your bowls? I've made a number of VDGs
over the years using various approaches but the problem I always have is
making a hole in the top dome. There are some alternative approaches
that don't require the top roller to actually be inside the sphere, but
I prefer my column to extend up into the top sphere. For my next VDG I'm
planning on using a stainless steel garden gazing globe. I have one
that's about 40cm in diameter and can get them up to 100cm in diameter.
It's very thin stainless steel I believe but stainless is really
difficult to cut through cleanly. I was considering trying a plasma
cutter to do it. Any thoughts on how that might work or other suggestions?
It depends on the thickness of the material. A plasma cutter is
certainly a good way.
A really sharp drill bit to get a starting hole, and then a power
nibbler to cut in a circle.
A "circle cutter" in a drill press (has a horizontal bar that holds a
cutter at a specified radius).