- Your machine size. What size diamond wheel will it accept? The six inch lapidary machine is the most common size. If you are interested in a grinding machine you can find them on our web site by clicking here.

- The size of the arbor (shaft) on your machine. All of the lapidary grinding wheels come with a 1" shaft. We supply a free plastic bush with each diamond grinding wheel that will fit most machines. If you are building your own machine make sure the shaft is "imperial" rather than "metric" in diameter as the bores and spacers are all manufactured in imperial sizes.

- Hard wheels or Flexible Wheel? Generally it is best to do most of your preparation and shaping on a hard diamond wheel. This is because they are long lasting and efficient with the diamond plated onto a steel rim. Once you have the shape of your stone it is best to finish it on a flexible wheel. The flexible wheels are foam backed and have a slight drape that helps eliminates flat spots in the final polishing process.

-What's a good combination of diamond wheels? This will depends somewhat on individual preference and experience. The idea is to start with a diamond wheel with a rough grit and gradually work your way up to a fine grit, removing scratches as you progress. It is usually a matter of compromise as to what diamond wheel you can fit on to your lapidary machine. A good combination recommended by one of the manufactures is: 

100 Hard, 280 Hard, 600 Hard, 280 Flexible Wheel, 600 Flexible Wheel, 1200 Flexible Wheel, 3000 Flexible Wheel

Some cutters prefer finishing on an 8000 grit or a 14,000 grit flexible wheel before going on to a final polish. We don't recommend the 14,000 grit or finer wheels as they take a very long time to "break in". Until a wheel is broken in they tend to cause fine scratches.

We stock two types of flexible diamond wheel that you can select from below. Both are made entirely in the USA. There are cheaper Chinese flexible wheel now appearing on the market but we don't sell or recommend them. We have found that they are not value for money as they lack quality, durability, balance and consistency in their application of grits.

Click on the link or picture above to select the type of wheel that you prefer.