Why just overclock?

J-Head Hotend


This hot-end is a combination of ideas from other nozzle designs combined with a goal to reduce the number of custom machined parts to a bare minimum.  The J-Head Mk IV-B has been proven to print reliably with both ABS and PLA.  (PLA will require a small fan to provide air-flow through the cooling vents milled in the sides of the nozzle holder.)

This hot-end easily interfaces with the most popular RepRap extruders, including Wade's Extuder, Greg Frost's Hinged Accessible Extruder, etc.

Please note:  The maximum operating temperature is 247 degrees Celsius as PEEK will soften at 248 degrees Celsius.  Due to many variables, affecting the accuracy of the temperature readings and settings, caution is recommended when extruding at temperatures approaching this limit.


  • Assembled J Head MK V-BV Hot-End
    • 0.5mm nozzle diameter
    • 3mm filament diameter
  • Power Resistor, 5.6 ohm or 6.8 ohm (depending upon availability)
  • Thermistor, 100k, 3%
  • PTFE Insulation for the resistor and thermistor

More Information: http://reprap.org/wiki/J_Head_Nozzle

Assembly Instructions: http://reprap.org/wiki/J_Head_Nozzle#Mk_V_2