Stepcraft CNC tool adapter

thingiverse

These adapters fit the Stepcraft spindle bracket and will hold a * 7mm spring loaded diamond tip engraver tool. * 3mm (1/8") engraving tips * 12mm linear bearing for a 12mm collet chuck extension that will hold various engraving bits My spring loaded drag bit tool is from ebay and seemed good value for money and well designed but doesn't need to use the spindle, the tool doesn't turn. https://www.ebay.ca/itm/SPRING-LOADED-PCD-DIAMOND-DRAG-ENGRAVING-TOOL-CNC/142851020584 I made my own spring loaded bit by using a linear bearing and a collet extension, now I can add all kinds of bits, mainly those really cheap carbide tips for other engravers but also a proper diamond tipped stone setting tool that is really tough (to set a grindstone). I also attach my cheap ebay digital dial indicator when checking how flat the surface that I want to engrave is. Stepcraft do sell Aluminium adapters from 43mm to 20 and 20 to 8 etc but not one for 43 to 7mm that I need. I don't have the means to make a metal version so I printed this one. I've engraved acrylic, steel, brass, glass and textured glass and the adapters seem rigid enough. These are very simple adapters to design and you can readily adapt it to your own tools. I have bought low cost Dremel tools like the 9929 bit or carbide point BIDE tungsten steel engraving bits.