Cobra "All-Metal" J-head Compatible Combo


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Micron E.M.E J-head Compatible Combo

  • Excellent performance with flexible materials
  • Light weight and compact design
  • Extremely fast and reliable printing with flexible materials such as NinjaFlex and PVA
  • Small light weight package 

100% All-Metal enables reliable and continuous printing up to 315 deg c.
Unlike other extruders (No Teflon tubing or plastic parts inside the hot-end).

  • Like all Micron E.M.E extruders & hot-ends, the Cobra extruder line comes with the patent pending easily replaceable nozzle and guide.
  • It takes less than a minute to switch to a different nozzle size or to a different material, without changing the calibration of the Z height.
  • Reliable design: Cobra extruders use a small but powerful 1:13 planetary geared motor equipped with a 304 stainless steel hobbed gear. Including a special tooth profile which provides strong filament gripping.
  • Continuous idler bearing with preload adjustment, using 2 set screws
  • Easy opening service door that maintains idler bearing preload while opening and closing.
  • Short and Smooth filament feeding design that prevents the filament from jamming after passing the hobbed gear.
  • Test proven with PLA, ABS, polycarbonate, nylon, Carbon PLA, HPIS, Ninjaflex and PVA.
  • High flow rate package available, sold separately.


  • Step motor rated current/Phase: 0.67 Amp. Rated voltage/Phases: 6.2 VDC
  • Fans: 30x30x10, 12V or 24V (specify)
  • Heaters: 12V or 24V (specify), 60 watt
  • Thermistors: EPCOS 100K thermistor (B57540G0104F000)
  • 1:13 Motor: Nema 11 Planetary Gearbox step Motors
  • Materials: black anodize Aluminum 6061-T651 housing, Stainless Steel 304 hobbed gear and Brass nozzle
  • Filament size: 1.75mm
  • Available nozzles diameter: 0.35mm and 0.5mm.
  • Total weight: 360 gram

What you get:

Assembled and tested Cobra J-head "all metal" feeder and hot-end including:

1 x Heater
1 x Thermistor
1 x Fan
1 x "DFGNM" 0.35mm installed.
1 x "DFGNM" 0.5mm replacement.
1 x J head Aluminum mounting plate.
2 x M4 installation screws.


Micron3DP provides solid models of the extruder assembly and the  J head Aluminum mounting plate