Quote:
Originally posted by bigben2k
Utabintarbo pointed out to me this morning that the 1/8 channel that the minimum endmill dictates is too large, and after recalculating (I made a sum error), it's apparent that there would be only 8 fins left (and 8 posts on the outer edges, maybe).
So the CNC option is out, unless someone's got a very high speed (10'000 rpm??) CNC setup that can handle a 1mm endmill.
In the mean time, I've been exploring the possibility of dremelling this thing by hand. I found plenty of bits at www.widgetsupply.com but I'll need to run this by you guys:
Here are the bits I picked out, and pics:
type: Diamond burr
Cylinder shaped diamond burr, 1/16" in diameter x 1/4" long, with 1/8" shank.
type: Carbide burr
0.8mm x 3.6mm Densply Maillefer Cylinder Carbide Burr, 1/16" shank. Approximately 3/4" overall. Made in Switzerland.
type: HSS
0.8mm x 4.1mm Densply Maillefer HSS Cylinder Burr. 1/16" shank. Approximately 3/4" overall. Made in Switzerland.
The pink stuff is a lubricant.
My little Dremel is rated to 35'000 rpm, but with little power. My question is: can I do this, in 1 mm, with the right Dremel?
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We use .020" diamond burrs (0.50 mm) and larger ones, like the one you have pictured to drill through glass, sapphire, ruby, etc. They do break very easily and would be a total bitch to put a side load on. We go through a lot of them just drilling straight holes. I also have the 35,000 rpm dremel and about 10 years of dremel experience. You can do just about whatever you want with it, IF you have the time and very strong, steady hands. It takes a long time and is easy to screw things up with a slight slip. They do make a Dremel drill press that would be ideal for aligning and holding the Dremel while you feed the material very slowly. Don't forget that you can probably use the fiberglass reinforced cut-off wheels to slice straight lines into the block, instead of 'milling' with the Dremel. The only problem is that those are harder to control if they hang up at all. Maybe worth a try.