I was thinking of making a couple of small (3/4") spheres for a
project I'm making. I was wondering if anyone had any nifty tricks
to do this.
I don't mind making half spheres and gluing them together, or putting
a small hole in the sphere for some sort of spinner device (I want to
embed a rare earth magnet into it). It does have to be perfectly
While I'm at it, just out of curiosity, how would you go about making
bigger spheres, say in the 3-4" variety?
"perfectly round" and "wood" don't really go together well. even if you
did get it nice and round, the first change in humidity would distort
that said, making spheres out of wood is work for the lathe. and lots
On Wed, 26 Jul 2006 01:54:25 GMT, email@example.com (julvr) wrote:
A lathe comes to mind. But, there's a better way to do it using a
router with a core-box bit and mounting the stock piece using a
double axis. Start by making a cube, mark opposite centers and
clipping off the corners.
This is strange, but works...For small spheres (<1"), build a box that
fits over an upside-down belt sander. Turn on the sander and put in a
wooden cube. The cube will bounce around and eventually become a
I've made a few this size on my lathe, after the first one
done by eye turned out to be slightly cylindrical :-). I
simply made a template covering about 90 degrees of arc,
and used calipers to compare length with diameter. It's
not too hard, just go slowly and check often until you get
the hang of it.
Tried a prooved method on lathe the make purfect spheres
use 3 or 4 jaw chuck
Turn stock to just above finished diameter .... around 7/8 in your case
Now make the chisel to cut them .....
2 options here
buy a 3/4" wad punch
weld or by some other means afix a decent size handle to it
Obtain a piece of pipe with an inside diameter of 3/4"
Go to grinder and sharpen end of pipe around circumference like chisel edge
Use homemade chisel to maKe balls ....
set toolrest to just below bottom of stock
gently apply pressure to homemede chisel and you will notice a ball starting
Be very careful and go very slowly as you get to centre. With the right
timber and a very steady hand, the ball will cut off. There is useally a
small (extremly small if you go very steady) knob to remove on one side of
I have used this method for many years with great success on ball up to 3
1/2" Diameter. Your choice of timber makes a big difference to the quality
and finish of balls. Once you have done a few it will only take a matter if
a minute or two to make a ball
Everything in life is easy if you have the right tools and a little
knowledge on how to use them
There are good suggestions in this thread but metal workers have the
same problem. Go to www.mcmaster.com and search for 3318A1 for a
picture of a metal lathe fixture to make spherical surfaces. It might
give you an idea for a wood fixture. I've seen shop-made router
fixtures with gimble mounts that might work for this. This month's Sky
and Telescope has an interesting new telescope design that has gotten
me thinking about large wooden spheres.
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