Metal "MB" HotEnd for 1.75mm filament

thingiverse

The text spinner's rewritten version of the original text is as follows: Constructed with a brass nozzle, stainless steel thermal barrier (also known as a thermal barrier), aluminum heater block, aluminum heatsink, and an aluminum mount plate, this device features a 6mm x 23mm 40 Watt heater cartridge. The thermistor is pre-glued with GB Weld inside a brass hex M-F M3 stud and equipped with a JST connector. Assembly or disassembly takes just one minute without the need for glue or kapton tape, as everything screws on and off. Inspired by the Makerbot Stepstruder Mk7 hotend, this device incorporates Makerbot's modern Mk8 geometry with a 0.4mm orifice diameter. However, it has a slightly larger outer hex size (7.9mm) compared to the Mk8 due to being machined in the USA from inch-size stock. The stainless steel thermal barrier is similar to that used in Stepstruders. Credit goes to Makerbot for inspiration; hence, it's called "MB." As of December 2014, this hotend with enhancements, including a PTFE-lined barrel and fan with shroud, can be purchased at these eBay links: [first link](http://www.ebay.com/itm/221613331858) and [second link](http://www.ebay.com/itm/221650302463). This is a release candidate, with more details on construction available upon release. Check out the STL for 3D viewing and the provided PDF drawing for dimensions.