Starting from sawing to sanding of a gem stone performed by this combo machine. Required a circular sawing blade and different preforming wheels for each step. Able to control the speed from 0 to 3000 rpm from the knob by 1 rpm deviation. Could hold the stone hardly even at 50 rpm.
![Slider 6 Gem Grind Preform cabochon sapphire ruby opal](https://gemlapidary.com/wp-content/uploads/sites/2/Preform-Trim-Saw-cabochon-Machine/Slider-6-Gem-Grind-Preform-cabochon-sapphire-ruby-opal-1660x830.jpg)