This is my first eBay auction for waxes. It’s crude and with no pictures. I think it would be cool to start with the 3D content from the users. I did a few examples models, but I want to see what this generates. For now I am going to post one of these auctions a day. With my Revo CNC mill I can do around 500 of these half dollar coin size waxes a month, but I don’t think I can handle the admin work to do this without software.

It’s going to be fun watching this evolve.
This auction is for a wax model of a custom US half dollar size coin that you design and we mill for you. Please email me at paul@paulkrush.com if you have any questions.

This wax can be cast using a lost wax casting process, but this auction is for the green wax model only. You have to summit the 3D file(s) to have the wax created.

This is NOT private. By submitting the 3D files you are granting us unrestricted use of them. We are going to post them on the Internet for anybody to download.

These terms of this auction are very restrictive, yet liberating once you understand why they are restrictive. We are opening up the world of CAD/CAM for jewelry to a far greater audience. Normally to mill a wax this size would run about $100!

As per the US Mint:

A half dollar is 30.61mm diameter by 2.15mm thick. The only thing you control is the front and back surface 29mm is diameter and 0.5mm thick. You can’t change the rim, outline, thickness, or put holes in the wax. Take .5mm off each side and the center will be at least 1.15mm thick.

Think of us as a printer that the world can see printing. Or think of us as a jewelry store in which the customers fill the cases. We can’t do anything unless you supply us with a 3D file.

The design submit must be copyright free, PG13, and not contain private information. We reserve the right to refuse any design.

The wax will have a tolerance of +- .2mm. It will be better that this most of the time.

The wax will still have tiny tabs from milling so will need to be cleaned up for casting. It’s just a little filling.

Depending on your design the model also may have packed wax from the milling process that we can’t clean automatically. Wax dust might get packed in a tiny hole say .5mm in diameter and .5mm deep. Avoiding this comes with experience.

Casting a coin is not the same as stamping one like most coins are made. Detail gets lost in the casting and polishing process. Details smaller then .3mm might get lost. You might have trouble with text under 2mm and 1mm high text is difficult to make. 1mm high text on a stamped coin will be crisp. The advantage to casting is you can do one coin at a time for much less money.

For now you are going to have to email us the 3D. We will accept STL, OBJ, 3DS, 3DM, and many more 3D formats. You have to be able to import the 3D into Rhino 3D CAD software. We will also take a 2D file grayscale image file with the image color representing height. We might also take vector formats Adobe illustrator or Corel Draw.

We will be using green wax for the coin.

Shipping – US mail only, $2 for the first and $1 for each additional wax. You can combine auctions.

Payment is by Paypal only.

This auction is our first offering in this process. We will be writing better auction description, FAQ’s and pictures soon. For now please ask questions.

Please email me at paul@paulkrush.com if you have any questions.