View Full Version : Rotary Shapping Attachments? (for a drill press)
Mike OMelia
12-13-2009, 10:41 PM
I have seen rotary attachments for making door framing medalions, so I know tools exist. I wand to be able to "carve" out ( relief) a hemispherical shape, maybe 1"-1.25" in diameter. It's really not "hemi", more like "semi", but round none the less. I have thought about modifying paddle bits. Surely, someone makes "bits" for this application?
Mike
Josiah Bartlett
12-14-2009, 2:13 AM
Something like this, perhaps?
http://us.microplane.com/rotaryshaper.aspx
Otherwise clamp a sacrificial piece on and use a forstner bit.
glenn bradley
12-14-2009, 2:58 AM
I think he is talking about rosettes(?) (http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/rosette.htm).
Mike OMelia
12-14-2009, 10:37 AM
Yes Glenn, something like that. But, I only want a 1" diameter "semi-sphere" so the blade would be small, convex and not at all complicated.
At the bottom of this link http://www.mlcswoodworking.com/shopsite_sc/store/bargainbits.html#rosettes if I could just get the center shape, I would be set.
Something like this http://www.woodcraft.com/Product/2004979/5995/2-34-Diameter-Rosette-Cutter--Style-C.aspx only with the concave part and only 1" in diameter (give or take).
Mike
Mike OMelia
12-14-2009, 6:07 PM
Well, you all got me thinking about it in the right direction.
Since I have been unable to find a suitable blade, could I grind the wings off of the one I linked to?
Mike
harry strasil
12-14-2009, 7:28 PM
just regrind a spade bit.
Rich Engelhardt
12-15-2009, 7:31 AM
Mike -
Since I have been unable to find a suitable blade, could I grind the wings off of the one I linked to?
Doubtful.
I have a similar cutter & the steel is fairly thick.
Maintaining a perfect balance between the two sides would be extremely difficult.
Any imbalance between the two is going to result in excessive vibration.
Heck, the things vibrate enough as is - from the factory - w/out possibly compounding the problem - there's quite a few threads dealing with it here.
IMHO - Harry's suggestion would be a lot easier, not to mention cheaper to try.
Mike OMelia
12-15-2009, 7:46 AM
Thanks all.
Here is an interesting source including blank blades.
http://magnate.net/catalog/2008%20Misc%20p85-89.pdf
(page 88)
I am going to do something different for now, but I will order that rosette head and blank stock. I have a machinist friend who I will task to shape the cutter.
Mike
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.