Paul,

The mold should weight about 3 to 4 pounds and i guess after the pce machined
should weight about 8 to 9 pounds, the bearings are much lighter then heavy ball
bearing and the shaft made in one pce with planet housing which this one i dont
know how much it will weight. I know we can find it  on Rheno but i dont know
those commands.i still have to apply several coat of polyurethane and sanding so
i will be ready in a week for the foundry and i am wondering what is the
aluminum grade i should go and then i can searching for the right foundry.


Jean Prudhomme

Nice pattern work Jean.

I think your wall thickness's are too thick.
Shoot for 1/4 inch to 3/8th inch thick max.
Do you have shrinkage and draft allowances?


Go for 356 T6. Most foundries can heat treat.


Also use a little bondo to fill the depressions in
the wood as the casting will look exactly like the pattern.

It will also be hard to remove the pattern from the sand
if it is not perfectly smooth.

The foundry will let you know about that right away :)

Paul Lamar                       

        I did allow .375 thickness wall enough for shinkage and draft and i had more then 3/16" where it need for machining for both end,inside at least .125"  and where the lathe chuck stand,yes i know i do have to fill all imperfection and lot of sanding for molding release facility this is why i did apply one coat of varnish first to see where it need to fill..All those mid ribs are for oil passageway and return and wall around  should be about .250" thick minimumPaul could you tell me the commands on Rheno to find the weight of your design as per the material you choose


Jean Prudhomme
              
Analyze  Mass properties  Volume.

Aluminum weighs .1 pound per cubic inch.

Paul Lamar