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The J-Head Mk V-BV 3mm is the best hotend on the market. It has been used in thousands of repraps world wide. Why? because of it's great print quality and extremely high reliability. We source this hotend directly from Reifsnyder Precision Works, the designer of the original J-Head.
With one exception, this hot-end is identical to the J-Head Mk V-B. Due to the standard thermistor being discontinued, the thermistor hole is drilled to fit the Semitec 104GT-2 (thermistor 5 in most firmware tables). In addition, this hot-end ships with the Semitec thermistor.
Note that the current image displays the J-Head Mk V-B. The only difference is the hole size and location of the thermistor hole.
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.)
The following is a list of just some of the improvements made to the J-Head Mk V-BV:
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.
In the event that black PEEK is unavailable, tan PEEK may be substituted for the nozzle holder.
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