flat belt pulley pattern

[dallen]

hopefully tomorrow I will be finished with this thread and can start a new one on how I messed up the bore in the flat belt pulley while boring it out to 1.5 inchs.

Sorry no photos but I did get the pattern rammed up today, if help had of shown up this evening I would of poured it today. But the flask halves are too big to handle by myself and I don't have any thing to pick it up with that will roll around the yard.

So first thing in the morning when help shows up I get to see if the pattern pieces will pull out of the sand, most of the runner came out when I removed the molding board, i was able to stick them back in place and there was no damage to the mold.

I'm hoping that this thing will pull like its suppose to and that I get a complete pour the first time.

[dallen]

OK here's what I been waiting on for about three weeks now. I know its got problems but then so do I, but I have a pulley that I think will work on the first pour. Yes it has some shrinkage on the hub, and there is some hot tearing between the hub and the web between the gussets, but hey guys this thing isn't going to be turning the speed of sound either. And there is one spot that has some sand inclusions but when you get to watch the video it will explain why the sand is there.

[chucketn]

Nice work! Man I wish I lived closer to you. Would love a chance to watch you work and pick your brain.

Chuck

[doubleboost]

Very well done
That is a big casting
John

[LJP]

I agree, looks great! But then, I don't know the first thing about casting.
Larry

[dallen]

here's the part that I know John wants to see, I have to go thru the first hour of the video tonight or in the morning for the part where I opened the mold and pulled the pattern pieces. I will say that after all the problems that the one half gave me, after it set in the mold all night it almost fell out of the sand when I pulled it.

DA

[doubleboost]

I could almost smell the burning sand
John

[dallen]

(09-13-2013, 02:43 PM)chucketn Wrote: Nice work! Man I wish I lived closer to you. Would love a chance to watch you work and pick your brain. Chuck

Chuck
theres not much up there to pick

(09-13-2013, 02:50 PM)doubleboost Wrote: Very well done
That is a big casting
John

John the casting with the gating on it weight about 18 pounds, the crucible I used was a new A20 that I have had for a number of years when we pulled it the metal was within about 1.5 inches of the top. I didn't want to shock the crucible seeing how it had set for so long. So I didn't really put a lot of burner on it the inside temp of the furnace was about 1400 degrees when I shut the burner off.
As was noted at the start of the video I throwed in over half a pound of copper wire to help with the machining qualities of the metal, as far as I can tell all of it was absorbed in to the aluminum.

(09-13-2013, 02:53 PM)LJP Wrote: I agree, looks great! But then, I don't know the first thing about casting.
Larry

Larry, thanks for the compliment, there were days I though I would never get this far with this project, glad the hard parts over, even if I have to make another one it will be a cake walk,

and just incase it hasn't been mentioned by myself, I HATE WORKING with WOOD!!! actually it wasn't so bad would of been easier if I actually had some woodworking tools.

DA

[f350ca]

Very impressive Dallen. Have to get going at learning to cast but probably never get to his level.

[Mayhem]

Nice work Dave - I'd be very happy with that and given the age of the machine those few, minor flaws I would imagine it will look the part.