The ULTIMATE Way to Get Smooth and Rounded Edges to the Rough Cut Side of Coin Rings!

Clean up and smooth-out your coin rings’ rough cut edges!

There’s a lot of information available today on how to fold and reduce coins to make coin rings, but there’s almost no information on HOW to actually go about and professionally finish and polish the thinner, non-reeded cut edge of your coin rings.

This side of the coin ring was once the inner portion of the coin prior to the forging process, and it can be very difficult to get a smooth-looking finish due to the sharp and uneven edges that are present.

Polishing Mandrel Set pic ROUGH COPY

Rough and uneven coin ring edge BEFORE using the Finishing & Polishing Mandrel Set

An easy solution to this problem is to utilize a Set of what are called “Finishing and Polishing Mandrels”; which will give you that high-quality smooth finish and shine to the NON-REEDED edges of your coin rings by getting rid of those unsightly, uneven, sharp edges WITHOUT using nail buffing files, having to sand by hand, using steel round files, or even deburring tools.

This Polishing Mandrel Set will finish and polish any coin ring from an approximate US size of 5, up to a US size of 14.

The Kit comes with a German-made nickel plated steel shank complete with 3 interchangeable Tapered Mandrel Cones in varying sizes:

Small — (fits ring sizes of approx. 5-8),
Medium — (fits ring sizes of approx. 8.5-11), and
Large — (fits ring sizes of approx. 11-14).

Polishing Mandrel pic2COPY
The advantage to using the finishing and polishing mandrels is that as the ring is spinning, the power drill acts like a small lathe, providing a much more uniform finish to the ring than can be achieved with either hand-sanding, using a nail buffing file, a steel round-file, or even a small rotary tool such as a Dremel.





1.) Determine which size Polishing Tapered Mandrel fits your completed coin ring, and slide the coin ring on to it.

2.) Place the Mandrel bit into your power drill and tighten.

3.) Adjust the coin ring until it’s well-balanced with no “wobbling” on the Mandrel with your power drill on, and then expand the Mandrel by tightening the Stainless Steel Phillips head set screw at the top which holds the coin ring securely in place.

4.) Begin on the outer edge of the coin ring with the coarser 100 Grit sandpaper and work your way around to the inner edge of the coin ring; making sure that ONLY the corner tip of the sandpaper is making contact with the unfinished inner, top, and outer edges of your coin ring to prevent damage to the rings’ detail.

5.) Continue to work the inner, top, and outer edges of the NON-REEDED side using the finer Grits of sandpaper as you go; finishing with “0000” Steel Wool. You can also use the steel wool and LIGHTLY go over the inner and the outer detail of the coin ring before you either polish it with a jeweler’s cloth or after you’ve put a patina (antique-looking) finish on the ring.

6.) The final step is to use a jeweler’s cloth to both buff and finish-polish your coin ring.

Your ring will now have a highly-smoothed, rounded, and polished edge on the NON-REEDED side that is not often seen on coin rings!

Smooth and even coin edge AFTER using the Finishing & Polishing Mandrel Set

Smooth and even coin ring edge AFTER using the Finishing & Polishing Mandrel Set


Another example below:

Before AND After COPY of finished coin rings

* Click on the photo to enlarge to see the differences in the edges of this Walking Liberty Half Dollar *

Other materials needed: a power drill, 3 different grits of sandpaper (150 Grit, 400 Grit, and 600 Grit ideally), some “0000” Steel Wool, and a jeweler’s polishing cloth to complete this process. Those items can be purchased from; at a big box store like Home Depot, or any local hardware store inexpensively.


– Always wear safety glasses and work gloves.
– Always use caution when working with any power tools and electricity.
– Keep fingers, long hair, and loose clothing away from any fast moving parts.

Tips for protecting your coin ring’s detail while forging it

What’s the best way to protect the inner and outer detail of my coin while I’m making it into a coin ring?

This is a question that I recently received from a customer of mine. There are some simple ways to protect your coin ring’s inner and outer detail while you’re forging it. In my own practice, I have 3 different tools that I can use when initially folding over, expanding, and then reducing the coin into a reduction die for final shaping:

1. A Ring Sizing Machine
This is my personal favorite.
A Durston ring sizing machine

A Durston ring sizing machine

2. A 1-ton Arbor Press
A Harbor Freight 1-ton arbor press

A Harbor Freight 1-ton arbor press

3. A 12-ton Shop Press (this is definitely way more press than you will ever need to use to make a coin ring; as you can easily use the 6-ton “A-frame” tabletop shop press from Harbor Freight if you want to).
12-ton Harbor Freight shop press

12-ton Harbor Freight shop press

Goal: to keep the reeded edge intact!
The outer reeded edge of Morgan Silver Dollars

The outer reeded edge of Morgan Silver Dollars

The best way to protect the inner detail of the coin as you begin to fold it down into your reduction die is to use the New and Improved Folding Cones. This method of folding leaves no marks, scratches, or marring, thus preserving 100% of the detail on the inside of the coin. (See photos below for reference):
Folding Cone pic COPY

Using a New Folding Cone to fold an American Silver Eagle with a Ring Sizer Machine

Improved Universal Folding Cones and Spacer Set, available for purchase at:

Improved Universal Folding Cones and Spacer Set, available for purchase at:

To purchase a Set of the 4 Universal Folding Cones and Spacer Kit, go to:

The key to protecting the outer edges of the coin ring as you’re reducing it is to use some impact-resistant plastic tape, which works very well in that it provides a buffer between the edge of the coin and either the ram head on your ring sizing machine, the press arm on a shop press, or the square ram on a 1-ton arbor press.

Below is a picture of my “Durston” Ring Sizing machine. Notice the thin grey layer of impact-resistant protective tape covering the ram head, (directly on top of the plastic bearing ball). This is what acts as a “buffer” and protects the outer edge of the coin that is facing UP from the reduction die as you are reducing it for shaping or final sizing of the coin ring.

Stabilizing Reduction Die pic

The impact-resistant tape (shown by the red arrows below), is also great for covering the bare metal on the expanding splines of the ring-sizing machine. This acts as a barrier between the inner side of the coin that is making contact as you are expanding it down the splines; also leaving no marks, scratches, or marring; thus protecting the inner detail of the coin ring as a result. (See photo below:)

Impact-resistant tape on the splines of my ring sizing machine.

Impact-resistant tape on the splines of my ring sizing machine.

Below is an example of the crisp inner detail of a finished proof 1975 Half Dollar from the country of Belize that I recently made for a customer, using the impact-resistant tape and the plastic bearing balls.

If you use these simple tools, your coin rings will turn out with striking detail!

Visit my Shop Page for all of the highest quality coin ring-making tools that I have to offer.


Belize Coin inner detail

Belize Coin inner detail

Three easy ways to get sized for your coin ring!

Before making a coin ring for someone, it’s important to make sure that you know what size their finger is that they plan to wear the coin ring on.

The best way to accurately know that is to have a set of ring sizing gauges like the set shown below on hand. When I run into someone that comments on my coin ring that I wear, and they express an interest on wanting one for themselves, I pull out my set of ring sizing gauges and instantly I know what size to make their coin ring. Not only does it take the guess-work out of it, but you’re eliminating an extra step for people who might otherwise forget to get their finger sized; and you might lose an opportunity to sell them a coin ring as a result of that.

ring sizing gauges
These metal gauges can be purchased on eBay or Amazon for under $10.00, and can accurately size your finger. Just search for the term “Ring Sizing Gauge”.

If you don’t want to purchase one or have to carry it around, you can always tell the person that you’re speaking with to go to their local jewelry store to get their finger sized, or they can go to a big-box store like WalMart or Target and ask to get their finger sized at the jewelry counter. They will provide that service at no charge.

Lastly as another ring-sizing option, I have included a free Ring Sizer Sheet below. To access it, simply CLICK on the document below to print it, follow the simple steps, and you will be able to measure your or someone else’s finger with it!

Ring_Sizer Sheet

Click on the image to print