Donna Hoff-Grambau on sun 24 nov 02
Anyone out there have any links to plans for building your own ball
Michigan Family History Network
Lily Krakowski on mon 25 nov 02
Don't know about links but Grebanier has a nice plan I built mine from,very
simple and intelligible. Cardew has a plan I find hard to figure out, and i
am willing to bet H. Davies has one which also requires you to invent the
Donna Hoff-Grambau writes:
> Anyone out there have any links to plans for building your own ball
> Donna Hoff-Grambau
> Michigan Family History Network
> Isabella MIGenWeb
> Missaukee MIGenWeb
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Michael Wendt on mon 25 nov 02
Go to the scrap yard nearest you. Find a shaft with a set of bearings and a
larger chain sprocket on the end (shaft 1" dia. or larger, sprocket 12"
dia. or larger). Throw a thick, necked in porcelain jar the size of the
sprocket diameter.When fired, it will be enough smaller to sit completely on
the sprocket and allow you to weld 4 pieces of flat bar onto the sprocket
equidistantly spaced about the rim. Make them long enough to reach the top
of the jar. You may add rubber pads inside and a clamp band around the
outside of the four bars after welding to keep the jar tight. To the outer
ends you can weld 4 bolt tabs with holes that will allow you to fasten a
cover plate over the jar mouth with a rubber lid liner made from inner tube
glued on with contact cement.
Mount the bearings on a base along with a large pulley, motor with small
pulley and belt. See other clayart posts for rotational speed based on the
size of the mill.
To the base, attach a pivot with pin detents that will allow you to :
1. Stand the jar upright for filling and lid installation.
2. tilt the jar level for milling.
3. tilt the jar upside down for dumping.
The nice thing about this design is you can make a ball capture screen to
bolt on in place of the lid when you dump so the balls stay in the mill,
ready for the next job.
This mill can be made in any size that suits you and if you build a very
large mill, be sure to place the shaft of the dump axis at the center of
gravity of the mill to assure that it will tilt , run and dump effortlessly.
Smaller mills aren't so critical.
If you plan to use multiple jars, be sure to make them accurately so they
all fit into the holder after you release the clamp band.
Michael Wendt firstname.lastname@example.org
2729 Clearwater Avenue
Lewiston, Idaho 83501