Casting the Crank

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After a 3 hour road trip to Pyro Minerals in Oakland, I arrived at home with two 60lb sacks of Petrobond.

 

I was anxious to get started, so I took the crank off my HF 7x10 lathe, and started making a mold. Since I will need another crank for the fine downfeed mod on my milling machine, I decided that this would be a good test.

 

After ramming up the mold, here is what the cavity looked like. I haven't cut in the sprue and riser yet.

 

R2-D2 cooling down after a pour.

 

About 5 minutes after the pour, I cracked open the mold. I was amazed at the finish detail since I didn't really take my time ramming the mold.

 

This is the first mold I have ever poured in my garage, and it came out perfect!

 

I trued up the edges on my 7x10 lathe and then did a bit of finish machining with the mill.

 

After I figure out what diameter shaft this will mount on, I'll drill the bore and the hole for the handle.