Mike's Hot End v2

thingiverse

See the latest version here: https://www.youmagine.com/designs/mikes-hot-end-v2-5, along with its accompanying water block at https://www.youmagine.com/designs/triple-water-block. The designer modified his previous design to work for 1.75mm filament by keeping the threaded rod size the same and simplifying the design. A ceramic liner similar in size is being tested for high-temperature printing purposes. This hot end is designed to fit with an upcoming water-cooling setup. Ignore the nozzle STL, as it's only for Thingiverse purposes. To build this version, follow these steps: 1. Nozzle: Drill a 4mm hole for the liner and use an end mill to create a better seat for the liner end, which is preferred over filing a taper on teflon. 2. Barrel: Drill a long 4mm hole through the stainless steel, considering drill bit wander is acceptable as long as it's not extreme. No need for an internal wall in this version, as the tubing connector puts pressure on the liner. 3. Parts: Purchase necessary parts from McMaster-Carr, including 3/8-24 brass and stainless steel rods, nuts, aluminum bar stock, teflon tubing, tube fitting, ceramic heater, and thermistor or thermocouple. 4. Tools required include a metal lathe, center, drill bits (77, 5/16, and 4mm), cobalt or carbide drill bit, sharp-tipped drill bit for brass, end mill for brass, tap (3/8-24 for aluminum, M5x0.8 for pneumatic fittings), and a thermistor/thermocouple drill bit. Assemble the nozzle and barrel with a teflon liner inside, ensuring proper fit and chamfering the liner end to aid filament feed.