Anyone know where I can find a hemisphere drill bit? I’d like it with a 1 inch radius. Tried some of the usual suspects like Rockler, Grizzly, and Woodcraft and came up empty.
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Replies
I always thought W.L. Fuller made just about everything, but no hits on a search for "hemisphere." Is there another word to use, maybe? This site carries all of their products:
http://www.bitsnbores.com/
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Another proud member of the "I Rocked With ToolDoc Club" .... :>)
Mike,
Is there any chance that this would be the same as a spade bit?
Rod
Try spoon bits. Used in a brace usually, and often by Windsor chair makers.
OK, Mike, we're tryin' to help you here, but don't know exactly what you're looking for. More info, please <grin>
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Another proud member of the "I Rocked With ToolDoc Club" .... :>)
You can get round tipped endmills. We typically modify a spade bit for small runs. A regular drill bit can be reground with practice. Fuller will modify one for you bit in my years of purchasing I don't believe this is a stock bit.
Like Alan said a core box on a plunge router will give the best finish.
Edited 12/5/2005 2:45 pm ET by RickL
It sounds as if a core box or round nose router bit might work:
http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/bt_core.html
That is it! Thanks.
Mike:
In the machinist jargon, the round nose cutter is called a ball end mill.The 1" diameter that you need will have a 1/2" shank.This would work in the plunge router. You must remember to clamp the work and the router base to a solid backing. These cutters do not have the spur to keep it from wandering away from the center layout line.
I use lots of these spiral mills in high speed steel.They are less expensive than the spiral router bit. Since the cutting angles are designed for metal,they may not be as free cutting as the router conterpart.
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