4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit

This is a great little machine. Grinds small rocks very well. For those complaining about arbor size, just order a 5/8 to 3/8 adaptor (aka a washer). I use the disk that comes with the machine as a base, then put on the adaptor, then any type of 5/8 wheel you wanna use. I then flip the retaining nut upside down and tighten. I've cut and polished 35 cabs so far and have had great results.

Much more economical than a lot of lapidary machines. The arbor is 8 mm in diameter and comes with one diamond wheel in 100 grit. I have many wheels with a 5/8" hole. I made an adapter from a stainless steel washer to fit in the hole and used two stainless steel fender washers, drilled to 8 mm, to clamp the wheels. Works great.

I love this. Economical and does the job for my small stones. Problem is, grinding wheels are standard 5/8” arbor hole. This has a 3/8” arbor hole. Can’t find replacement wheels anywhere. And unfortunately there is a language barrier so the manufacturer has no idea what I am talking about. So, back to Amazon this is going. Very disappointed. Great product.

I love this flat. Its a bit noisy and it didn't come with the 320 grit sand paper discs. But to be fair on the site it didn't say they were included, but the manual shows them being in the accessories.Its very portable and easy to change out the discs, and I really love the convenience of the recycled water feature. I would love to get this same grinder in a 6" too, otherwise I recommend this grinder for smaller stones and its great for beginners. Please view the images on the site as it has clearer instructions and a parts list. It shows the grit paste in USA terms. If this company offers extra discs for sale that would be great too.

This is an awesome flat grinder. Parts are hard to find and the blade guard is delicate so be very careful with it but this product is really awesome! The hole size for blades is 3/8” and hard to find but there is a replacement kit you can order through the seller that includes diamond blade sanding pads and replacement polishing pad

Worked great but my rocks much too big , wheel too small, but great for small stones, small enough to easily be portable.