How it Works: Sizing Down in Wax

Products in How it Works: Sizing Down in Wax Video

Video Transcript

Hi I'm Angela Busby, I'm a trainer here at Stuller and on this segment of How it Works we're going to show you how to size in wax.  We're going to go ahead and size down and what you want to do is you're going to inspect your piece and make sure that all your prongs are there and your piece is complete and has all its parts.  This particular piece has a number on the inside it's an identification code.  So we're going to go ahead and take that out before you start otherwise your size won't be correct.  So we're just going to take that out. I'm going to take a q-tip with solvent.  You're going to just smooth out the texture that you put in there with the rotary file.  Alright we've done that. Next thing we're going to do is we're going to check and make sure that what this size is and this is showing its a six and a half and I want to go down to a four and a half. So I'm going to grab my mark a size and i'm going to take two sizes off from a six and a half to four and a half would be removing two sizes.  So we're going to find our 2 size, which would be the number eight on our mark a size and we're going to mark directly at the bottom of the wax.  if you size on the shoulders the odds of that it being tapered is very good and then you're going to end up with your piece too wide one side is going to be wider than the other one side is going to be thinner so it's pretty important that you go ahead and mark in the dead center of there right where the sprue would be at.

 So we're going to mark that two sizes out just to give ourselves a mark and then I'm going to grab the clippers and we're just going to clip that section out.  So now we're going to put it on our ring sizer. This is a mandrel, we use step mandrel you can use whatever it is that you have.   We're going to go ahead and do that we're going to weld this port together we use a blue inlay wax for this purpose or you can use an injection wax that's the same wax of your injection piece.  And I kind of like to use the same wax but a lot of people use the blue inlay wax and what you want to do is you want to make sure that the piece is touching your mandrel and you're going to feel that that gap in and you really only want to remove what you're the size you need.  Okay that's done we'll let that cool a bit and we're going to take the ring off of the mandrel and we're going to start working it and making sure that all of the little holes or the the gaps or the areas on the sizes is worked. So it's already started to cool so we're going to take that off.  We're going to make sure that we have a four and a half, we are right on the four and a half so now we can start working it.  So I'm gonna come in here and i'm going to check and make sure that the inside is filled in. 
I see a little bit of an area.  You might need to add just a tiny bit there and then you want to make sure your sides are filled in so you're going to fill here and here. I say just the slightest little bit of a groove here. I'm going to flip it and I'm gonna do the same. 

Next thing we're going to do we're going to go ahead and file off the excess. So I'm going to use a half-round file and it's flat on one side it's half-round on the inside and that will will allow me to get on the inside of the ring and keep the shape of that inside. You don't want to use anything square on a half-round or a round.  It's pretty important ok so we've got our excess off that off that inside and then we're going to come we're going to do the same to the sides and the outside.  All right we're going to work this outside and you only want to work what you've added. Don't touch the rest of the shank cause you'll end up with flat spots or humps. i'm going to go ahead and I'm gonna get that q-tip again with my wax solvent.  Get a little bit of wax solvent. Make sure you don't put too much on.  We're just removing the file marks marks that we put on there.   So as I'm working this I see there's another spot that I didn't get so i'm going to go ahead and fill that again.  This time I'm using the blue inlay wax it melts a little quicker than the injection wax.  Now i'm going to go to this.  This is one of the little buff sticks you can use them on metal you can use them on wax.  Go back to my inside make sure that's out. Now  I'm gonna come back with a felt stick in the solvent to make sure that the file marks that I put in on the inside with that file is worked out because you want this to be as smooth as possible and the cleanup in the metal is going to be a lot easier if you go ahead and take off any of the scratches.   Felt works really good with this wax solvent removing the roughness.  That is complete.  We have just did of size and wax down.  You would go ahead and put your sprue right back on it.
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