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<h1 id="firstHeading" class="firstHeading" lang="en"><span dir="auto">J Head Nozzle</span></h1>
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<p>Release status: working
</p>
<div style="background-color: white; margin-left: 5px; margin-right: 5px; padding-top: 5px; color: black; font-weight: normal;">
<div class="center"><div class="floatnone"><a href="/wiki/File:Jhn_mk5.jpg" class="image"><img alt="Jhn mk5.jpg" src="/mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/190px-Jhn_mk5.jpg" width="190" height="217" srcset="/mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/285px-Jhn_mk5.jpg 1.5x, /mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/380px-Jhn_mk5.jpg 2x" /></a></div></div>
<table>
<tr>
<td style="vertical-align: top"> <b>Description</b> </td>
<td> J-Head Nozzle and Thermal Barrier Based on a combination of ideas from the Makerbot Mk 5 hot end, The Inline Heater Variation, some ideas from Brian Briggs, and some ideas from me.
</td></tr>
<tr>
<td style="vertical-align: top"> <b>License</b> </td>
<td> GPL
</td></tr>
<tr>
<td style="vertical-align: top"> <b>Author</b> </td>
<td> <a href="/wiki/User:Reifsnyderb" title="User:Reifsnyderb">Reifsnyderb</a>
</td></tr>
<tr>
<td style="vertical-align: top"> <b>Based-on</b> </td>
<td> <a href="/wiki/Extruder_Nozzle_Variations" title="Extruder Nozzle Variations">Extruder Nozzle Variations</a>
</td></tr>
<tr>
<td style="vertical-align: top"> <b>Categories</b> </td>
<td> <a href="/wiki/Category:Hot_End" title="Category:Hot End">Hot End</a>, <a href="/wiki/Category:Extruders" title="Category:Extruders">Extruders</a>
</td></tr>
<tr>
<td style="vertical-align: top"> <b>CAD Models</b> </td>
<td> none
</td></tr>
<tr>
<td style="vertical-align: top"> <b>External Link</b> </td>
<td> <a rel="nofollow" class="external text" href="http://jheadnozzle.blogspot.com">Blog</a>
</td></tr></table>
</div>
</div>
<p><br />
</p>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Introduction"><span class="tocnumber">1</span> <span class="toctext">Introduction</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="#Suppliers"><span class="tocnumber">2</span> <span class="toctext">Suppliers</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="#Parts_List"><span class="tocnumber">3</span> <span class="toctext">Parts List</span></a>
<ul>
<li class="toclevel-2 tocsection-4"><a href="#Mk_I"><span class="tocnumber">3.1</span> <span class="toctext">Mk I</span></a></li>
<li class="toclevel-2 tocsection-5"><a href="#Mk_II"><span class="tocnumber">3.2</span> <span class="toctext">Mk II</span></a></li>
<li class="toclevel-2 tocsection-6"><a href="#Mk_III"><span class="tocnumber">3.3</span> <span class="toctext">Mk III</span></a></li>
<li class="toclevel-2 tocsection-7"><a href="#Mk_III-B"><span class="tocnumber">3.4</span> <span class="toctext">Mk III-B</span></a></li>
<li class="toclevel-2 tocsection-8"><a href="#Mk_IV"><span class="tocnumber">3.5</span> <span class="toctext">Mk IV</span></a></li>
<li class="toclevel-2 tocsection-9"><a href="#Mk_IV-B"><span class="tocnumber">3.6</span> <span class="toctext">Mk IV-B</span></a></li>
<li class="toclevel-2 tocsection-10"><a href="#Mk_V"><span class="tocnumber">3.7</span> <span class="toctext">Mk V</span></a></li>
<li class="toclevel-2 tocsection-11"><a href="#Mk_V-B"><span class="tocnumber">3.8</span> <span class="toctext">Mk V-B</span></a></li>
<li class="toclevel-2 tocsection-12"><a href="#Mk_V-BV"><span class="tocnumber">3.9</span> <span class="toctext">Mk V-BV</span></a></li>
<li class="toclevel-2 tocsection-13"><a href="#Mk_VI-B"><span class="tocnumber">3.10</span> <span class="toctext">Mk VI-B</span></a></li>
<li class="toclevel-2 tocsection-14"><a href="#Mk_VII-B"><span class="tocnumber">3.11</span> <span class="toctext">Mk VII-B</span></a></li>
<li class="toclevel-2 tocsection-15"><a href="#Sundries"><span class="tocnumber">3.12</span> <span class="toctext">Sundries</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-16"><a href="#Parts_Descriptions"><span class="tocnumber">4</span> <span class="toctext">Parts Descriptions</span></a>
<ul>
<li class="toclevel-2 tocsection-17"><a href="#Machined_Parts"><span class="tocnumber">4.1</span> <span class="toctext">Machined Parts</span></a>
<ul>
<li class="toclevel-3 tocsection-18"><a href="#J-Head_Nozzle"><span class="tocnumber">4.1.1</span> <span class="toctext">J-Head Nozzle</span></a>
<ul>
<li class="toclevel-4 tocsection-19"><a href="#Version_1"><span class="tocnumber">4.1.1.1</span> <span class="toctext">Version 1</span></a></li>
<li class="toclevel-4 tocsection-20"><a href="#Version_1.1"><span class="tocnumber">4.1.1.2</span> <span class="toctext">Version 1.1</span></a></li>
<li class="toclevel-4 tocsection-21"><a href="#Version_2"><span class="tocnumber">4.1.1.3</span> <span class="toctext">Version 2</span></a></li>
<li class="toclevel-4 tocsection-22"><a href="#Version_3"><span class="tocnumber">4.1.1.4</span> <span class="toctext">Version 3</span></a></li>
<li class="toclevel-4 tocsection-23"><a href="#Version_4"><span class="tocnumber">4.1.1.5</span> <span class="toctext">Version 4</span></a></li>
<li class="toclevel-4 tocsection-24"><a href="#Version_4.1"><span class="tocnumber">4.1.1.6</span> <span class="toctext">Version 4.1</span></a></li>
<li class="toclevel-4 tocsection-25"><a href="#Version_4.2"><span class="tocnumber">4.1.1.7</span> <span class="toctext">Version 4.2</span></a></li>
<li class="toclevel-4 tocsection-26"><a href="#Version_5"><span class="tocnumber">4.1.1.8</span> <span class="toctext">Version 5</span></a></li>
<li class="toclevel-4 tocsection-27"><a href="#Version_6"><span class="tocnumber">4.1.1.9</span> <span class="toctext">Version 6</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-28"><a href="#Nozzle_Holder"><span class="tocnumber">4.1.2</span> <span class="toctext">Nozzle Holder</span></a>
<ul>
<li class="toclevel-4 tocsection-29"><a href="#Version_1_2"><span class="tocnumber">4.1.2.1</span> <span class="toctext">Version 1</span></a></li>
<li class="toclevel-4 tocsection-30"><a href="#Version_2_2"><span class="tocnumber">4.1.2.2</span> <span class="toctext">Version 2</span></a></li>
<li class="toclevel-4 tocsection-31"><a href="#Version_3_2"><span class="tocnumber">4.1.2.3</span> <span class="toctext">Version 3</span></a></li>
<li class="toclevel-4 tocsection-32"><a href="#Version_4_2"><span class="tocnumber">4.1.2.4</span> <span class="toctext">Version 4</span></a></li>
<li class="toclevel-4 tocsection-33"><a href="#Version_5_2"><span class="tocnumber">4.1.2.5</span> <span class="toctext">Version 5</span></a></li>
<li class="toclevel-4 tocsection-34"><a href="#Version_6_2"><span class="tocnumber">4.1.2.6</span> <span class="toctext">Version 6</span></a></li>
<li class="toclevel-4 tocsection-35"><a href="#Experimental.2C_Fluted"><span class="tocnumber">4.1.2.7</span> <span class="toctext">Experimental, Fluted</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-36"><a href="#Heat_Sink"><span class="tocnumber">4.1.3</span> <span class="toctext">Heat Sink</span></a>
<ul>
<li class="toclevel-4 tocsection-37"><a href="#Version_1_3"><span class="tocnumber">4.1.3.1</span> <span class="toctext">Version 1</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-38"><a href="#PTFE_Liner"><span class="tocnumber">4.1.4</span> <span class="toctext">PTFE Liner</span></a>
<ul>
<li class="toclevel-4 tocsection-39"><a href="#Version_1_4"><span class="tocnumber">4.1.4.1</span> <span class="toctext">Version 1</span></a></li>
<li class="toclevel-4 tocsection-40"><a href="#Version_2_3"><span class="tocnumber">4.1.4.2</span> <span class="toctext">Version 2</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-41"><a href="#1.75mm_Conversion"><span class="tocnumber">4.1.5</span> <span class="toctext">1.75mm Conversion</span></a>
<ul>
<li class="toclevel-4 tocsection-42"><a href="#Mk_II_To_Mk_IV_Series_Hot-Ends"><span class="tocnumber">4.1.5.1</span> <span class="toctext">Mk II To Mk IV Series Hot-Ends</span></a>
<ul>
<li class="toclevel-5 tocsection-43"><a href="#PEEK_hollow_set_screw"><span class="tocnumber">4.1.5.1.1</span> <span class="toctext">PEEK hollow set screw</span></a></li>
<li class="toclevel-5 tocsection-44"><a href="#1.75mm_PTFE_Liner"><span class="tocnumber">4.1.5.1.2</span> <span class="toctext">1.75mm PTFE Liner</span></a></li>
</ul>
</li>
<li class="toclevel-4 tocsection-45"><a href="#Mk_V_and_Later_Hot_Ends"><span class="tocnumber">4.1.5.2</span> <span class="toctext">Mk V and Later Hot Ends</span></a></li>
</ul>
</li>
</ul>
</li>
<li class="toclevel-2 tocsection-46"><a href="#Off-The-Shelf_Parts"><span class="tocnumber">4.2</span> <span class="toctext">Off-The-Shelf Parts</span></a>
<ul>
<li class="toclevel-3 tocsection-47"><a href="#Heater_Resistor"><span class="tocnumber">4.2.1</span> <span class="toctext">Heater Resistor</span></a>
<ul>
<li class="toclevel-4 tocsection-48"><a href="#5.6_ohm_.28Large_Standard.29"><span class="tocnumber">4.2.1.1</span> <span class="toctext">5.6 ohm (Large Standard)</span></a></li>
<li class="toclevel-4 tocsection-49"><a href="#6.8_ohm_.28Large_Alternate.29"><span class="tocnumber">4.2.1.2</span> <span class="toctext">6.8 ohm (Large Alternate)</span></a></li>
<li class="toclevel-4 tocsection-50"><a href="#6.8_ohm_.28Small.29"><span class="tocnumber">4.2.1.3</span> <span class="toctext">6.8 ohm (Small)</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-51"><a href="#Support_Washer"><span class="tocnumber">4.2.2</span> <span class="toctext">Support Washer</span></a></li>
<li class="toclevel-3 tocsection-52"><a href="#Thermistors"><span class="tocnumber">4.2.3</span> <span class="toctext">Thermistors</span></a>
<ul>
<li class="toclevel-4 tocsection-53"><a href="#Thermistor_1"><span class="tocnumber">4.2.3.1</span> <span class="toctext">Thermistor 1</span></a></li>
<li class="toclevel-4 tocsection-54"><a href="#Thermistor_5"><span class="tocnumber">4.2.3.2</span> <span class="toctext">Thermistor 5</span></a></li>
</ul>
</li>
<li class="toclevel-3 tocsection-55"><a href="#Ceramic_Heater_Cartridge"><span class="tocnumber">4.2.4</span> <span class="toctext">Ceramic Heater Cartridge</span></a></li>
</ul>
</li>
</ul>
</li>
<li class="toclevel-1 tocsection-56"><a href="#Assembly"><span class="tocnumber">5</span> <span class="toctext">Assembly</span></a>
<ul>
<li class="toclevel-2 tocsection-57"><a href="#Photo_Series_with_detailed_assembly_instructions_for_current_version_of_JHead"><span class="tocnumber">5.1</span> <span class="toctext">Photo Series with detailed assembly instructions for current version of JHead</span></a></li>
<li class="toclevel-2 tocsection-58"><a href="#Mk_I_2"><span class="tocnumber">5.2</span> <span class="toctext">Mk I</span></a></li>
<li class="toclevel-2 tocsection-59"><a href="#Mk_II_2"><span class="tocnumber">5.3</span> <span class="toctext">Mk II</span></a></li>
<li class="toclevel-2 tocsection-60"><a href="#Mk_III_2"><span class="tocnumber">5.4</span> <span class="toctext">Mk III</span></a></li>
<li class="toclevel-2 tocsection-61"><a href="#Mk_IV_2"><span class="tocnumber">5.5</span> <span class="toctext">Mk IV</span></a></li>
<li class="toclevel-2 tocsection-62"><a href="#Mk_V_2"><span class="tocnumber">5.6</span> <span class="toctext">Mk V</span></a></li>
<li class="toclevel-2 tocsection-63"><a href="#Heater_Resistor_2"><span class="tocnumber">5.7</span> <span class="toctext">Heater Resistor</span></a></li>
<li class="toclevel-2 tocsection-64"><a href="#Thermistor"><span class="tocnumber">5.8</span> <span class="toctext">Thermistor</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-65"><a href="#Installation"><span class="tocnumber">6</span> <span class="toctext">Installation</span></a>
<ul>
<li class="toclevel-2 tocsection-66"><a href="#Using_the_Mounting_Holes_in_the_Wade_Extruder"><span class="tocnumber">6.1</span> <span class="toctext">Using the Mounting Holes in the Wade Extruder</span></a></li>
<li class="toclevel-2 tocsection-67"><a href="#Using_The_Support_Washer"><span class="tocnumber">6.2</span> <span class="toctext">Using The Support Washer</span></a></li>
<li class="toclevel-2 tocsection-68"><a href="#Using_Wire_With_The_Support_Washer"><span class="tocnumber">6.3</span> <span class="toctext">Using Wire With The Support Washer</span></a></li>
<li class="toclevel-2 tocsection-69"><a href="#Using_A_Mounting_Groove"><span class="tocnumber">6.4</span> <span class="toctext">Using A Mounting Groove</span></a></li>
<li class="toclevel-2 tocsection-70"><a href="#Wildseyed_Simple_Hot_End_Mounting_System"><span class="tocnumber">6.5</span> <span class="toctext">Wildseyed Simple Hot End Mounting System</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-71"><a href="#Notes"><span class="tocnumber">7</span> <span class="toctext">Notes</span></a>
<ul>
<li class="toclevel-2 tocsection-72"><a href="#General"><span class="tocnumber">7.1</span> <span class="toctext">General</span></a></li>
<li class="toclevel-2 tocsection-73"><a href="#Nozzle_Orifice"><span class="tocnumber">7.2</span> <span class="toctext">Nozzle Orifice</span></a>
<ul>
<li class="toclevel-3 tocsection-74"><a href="#Drill_bit_sizes_and_conversions"><span class="tocnumber">7.2.1</span> <span class="toctext">Drill bit sizes and conversions</span></a></li>
<li class="toclevel-3 tocsection-75"><a href="#Nozzle_orifice_length"><span class="tocnumber">7.2.2</span> <span class="toctext">Nozzle orifice length</span></a></li>
</ul>
</li>
<li class="toclevel-2 tocsection-76"><a href="#Troubleshooting"><span class="tocnumber">7.3</span> <span class="toctext">Troubleshooting</span></a></li>
<li class="toclevel-2 tocsection-77"><a href="#Testing"><span class="tocnumber">7.4</span> <span class="toctext">Testing</span></a>
<ul>
<li class="toclevel-3 tocsection-78"><a href="#Prototype"><span class="tocnumber">7.4.1</span> <span class="toctext">Prototype</span></a></li>
<li class="toclevel-3 tocsection-79"><a href="#Mk_I_3"><span class="tocnumber">7.4.2</span> <span class="toctext">Mk I</span></a></li>
<li class="toclevel-3 tocsection-80"><a href="#Mk_I_with_Heat_Sink"><span class="tocnumber">7.4.3</span> <span class="toctext">Mk I with Heat Sink</span></a></li>
<li class="toclevel-3 tocsection-81"><a href="#Mk_III-B_2"><span class="tocnumber">7.4.4</span> <span class="toctext">Mk III-B</span></a></li>
<li class="toclevel-3 tocsection-82"><a href="#Mk_IV_Original_Prototype"><span class="tocnumber">7.4.5</span> <span class="toctext">Mk IV Original Prototype</span></a></li>
<li class="toclevel-3 tocsection-83"><a href="#Mk_V-B_2"><span class="tocnumber">7.4.6</span> <span class="toctext">Mk V-B</span></a></li>
<li class="toclevel-3 tocsection-84"><a href="#Experimental_Light-Weight_Hot_End"><span class="tocnumber">7.4.7</span> <span class="toctext">Experimental Light-Weight Hot End</span></a></li>
<li class="toclevel-3 tocsection-85"><a href="#Thermally_Fused_Hot-End"><span class="tocnumber">7.4.8</span> <span class="toctext">Thermally Fused Hot-End</span></a></li>
</ul>
</li>
<li class="toclevel-2 tocsection-86"><a href="#Possible_Future_Modifications"><span class="tocnumber">7.5</span> <span class="toctext">Possible Future Modifications</span></a>
<ul>
<li class="toclevel-3 tocsection-87"><a href="#Implemented_Or_Working"><span class="tocnumber">7.5.1</span> <span class="toctext">Implemented Or Working</span></a></li>
<li class="toclevel-3 tocsection-88"><a href="#Testing_Phase"><span class="tocnumber">7.5.2</span> <span class="toctext">Testing Phase</span></a></li>
<li class="toclevel-3 tocsection-89"><a href="#Under_Consideration"><span class="tocnumber">7.5.3</span> <span class="toctext">Under Consideration</span></a></li>
<li class="toclevel-3 tocsection-90"><a href="#Rejected"><span class="tocnumber">7.5.4</span> <span class="toctext">Rejected</span></a></li>
<li class="toclevel-3 tocsection-91"><a href="#Miscellaneous"><span class="tocnumber">7.5.5</span> <span class="toctext">Miscellaneous</span></a></li>
</ul>
</li>
<li class="toclevel-2 tocsection-92"><a href="#Weights"><span class="tocnumber">7.6</span> <span class="toctext">Weights</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-93"><a href="#Working_Examples"><span class="tocnumber">8</span> <span class="toctext">Working Examples</span></a>
<ul>
<li class="toclevel-2 tocsection-94"><a href="#Pictures"><span class="tocnumber">8.1</span> <span class="toctext">Pictures</span></a></li>
<li class="toclevel-2 tocsection-95"><a href="#Videos"><span class="tocnumber">8.2</span> <span class="toctext">Videos</span></a></li>
</ul>
</li>
</ul>
</td></tr></table>
<h2> <span class="mw-headline" id="Introduction">Introduction</span></h2>
<p><a href="/wiki/File:Jhn_nozzles.jpg" class="image"><img alt="Jhn nozzles.jpg" src="/mediawiki/images/thumb/f/fb/Jhn_nozzles.jpg/300px-Jhn_nozzles.jpg" width="300" height="179" srcset="/mediawiki/images/thumb/f/fb/Jhn_nozzles.jpg/450px-Jhn_nozzles.jpg 1.5x, /mediawiki/images/thumb/f/fb/Jhn_nozzles.jpg/600px-Jhn_nozzles.jpg 2x" /></a>
</p><p>This nozzle 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. By reducing the number of machined parts, it is hoped that the cost of this hot-end can be kept down while improving the reliability.
</p><p>The use of a machined piece of round PTFE, as a liner, was requested in one of two designs by Brian Briggs.
</p><p>The idea of using the <a href="/wiki/PTFE" title="PTFE">PTFE</a> tubing as a liner, from the <a href="/wiki/Category:Cold_End" title="Category:Cold End">Cold End</a> to the tip, was borrowed from the Makerbot Mk V extruder design.
</p><p>The PTFE tubing also acts to "bridge" the joint between the <a href="/wiki/PEEK" title="PEEK">PEEK</a> insulator and the <a href="/mediawiki/index.php?title=Brass&action=edit&redlink=1" class="new" title="Brass (page does not exist)">brass</a> nozzle/heater. By not having the <a href="/wiki/Filament" title="Filament">filament</a> in contact with this joint it is hoped that any possibility of leakage will be completely eliminated.
</p><p>The use of a combination heater and nozzle was borrowed from <a href="/mediawiki/index.php?title=User:ParCan&action=edit&redlink=1" class="new" title="User:ParCan (page does not exist)">ParCan's</a> <a href="/wiki/Extruder_Nozzle_Variations#Inline_Heater_-_Variation" title="Extruder Nozzle Variations"> Inline Heater Nozzle Variation</a>. However, instead of the heater resistor being mounted parallel to the path of the filament it is mounted perpendicular to the path of the filament. This was done to both reduce the length of the nozzle and to make it a little easier to run the leads from the heater resistor. Combining the heater and nozzle also helped to meet the goal to keep the number of custom machined parts to a minimum.
</p><p><b>Advantages</b>
</p>
<ul><li> Internally, the filament path is identical to that of an already proven design.
</li><li> The design is simple as the number of custom machined parts is kept to a minimum.
</li><li> If necessary, the PTFE liner can be replaced by using an off-the-shelf piece of PTFE tubing.
</li><li> The PTFE is not stressed nor used to provide support. This reduces a point of failure that is part of other designs.
</li><li> A resistor is used as a heater. There is no need to wrap nichrome wire or to bake a heater core.
</li><li> Heat transmission is improved as there is no thermal junction where a separate heater screws onto the nozzle.
</li><li> With most versions weighing in at under 25 grams and the lightest version weighing in at under 13 grams, this design is very light.
</li></ul>
<p><b>Disadvantages</b>
</p>
<ul><li> Considerable machining is required.
</li></ul>
<h2> <span class="mw-headline" id="Suppliers">Suppliers</span></h2>
<p><br /><br /><br />
</p><p><br />
<b><a rel="nofollow" class="external text" href="http://jheadnozzle.blogspot.com/2013/11/is-j-head-real.html">Differences Between Real J-Heads and Cheap Clones</a></b>
</p><p><br />
</p>
<ul><li> <a rel="nofollow" class="external text" href="http://www.hotends.com">HotEnds.com</a>
</li></ul>
<ul><li> <a rel="nofollow" class="external text" href="http://www.3dacessorieshub.com">3dacessorieshub.com</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.3dprinterczar.com">3D Printer Czar</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.charlies3dtechnologies.eu">Charlie's 3D Technologies</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.cubic-print.com">Cubic Print Germany</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.makerfarm.com">MakerFarm.com</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.NorcalReprap.com">NorcalReprap.com</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.plastic2print.com/en/j-head-hotends.html">Plastic2Print Europe</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.reprap-usa.com">RepRap-USA</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.reprapsource.com">reprapsource</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.reprap-france.com/">eMotion Tech reprap-france.com</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.TriDPrinting.com/Hot-Ends/">TriDPrinting.com HotEnds Seattle</a>
</li><li> <a rel="nofollow" class="external text" href="http://www.ultibots.com/hot-ends">Ultibots Hot Ends</a>
</li></ul>
<h2> <span class="mw-headline" id="Parts_List">Parts List</span></h2>
<h3> <span class="mw-headline" id="Mk_I">Mk I</span></h3>
<p>Summary: First J-Head hot-end.
</p><p><a href="/wiki/File:Jhn_mk1.jpg" class="image"><img alt="Jhn mk1.jpg" src="/mediawiki/images/thumb/c/c3/Jhn_mk1.jpg/150px-Jhn_mk1.jpg" width="150" height="136" srcset="/mediawiki/images/thumb/c/c3/Jhn_mk1.jpg/225px-Jhn_mk1.jpg 1.5x, /mediawiki/images/thumb/c/c3/Jhn_mk1.jpg/300px-Jhn_mk1.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v1.x)
</td>
<td>Machined Brass Nozzle/Heater Combination, Version 1.x
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v1)
</td>
<td>Machined PEEK Nozzle Holder, Version 1.x
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_II">Mk II</span></h3>
<p>Summary: Added a hollow set-screw to retain the PTFE liner.
</p><p><a href="/wiki/File:Jhn_mk2.jpg" class="image"><img alt="Jhn mk2.jpg" src="/mediawiki/images/thumb/e/e4/Jhn_mk2.jpg/150px-Jhn_mk2.jpg" width="150" height="132" srcset="/mediawiki/images/thumb/e/e4/Jhn_mk2.jpg/225px-Jhn_mk2.jpg 1.5x, /mediawiki/images/thumb/e/e4/Jhn_mk2.jpg/300px-Jhn_mk2.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v1.x)
</td>
<td>Machined Brass Nozzle/Heater Combination, Version 1.x
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v2)
</td>
<td>Machined PEEK Nozzle Holder, Version 2
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_III">Mk III</span></h3>
<p>Summary: Added a heat sink in order to print PLA. To reduce weight, an aluminum nozzle is used.
</p><p><a href="/wiki/File:Jhn_mk3.jpg" class="image"><img alt="Jhn mk3.jpg" src="/mediawiki/images/thumb/5/57/Jhn_mk3.jpg/150px-Jhn_mk3.jpg" width="150" height="142" srcset="/mediawiki/images/thumb/5/57/Jhn_mk3.jpg/225px-Jhn_mk3.jpg 1.5x, /mediawiki/images/thumb/5/57/Jhn_mk3.jpg/300px-Jhn_mk3.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v2)
</td>
<td>Machined Aluminum Nozzle/Heater Combination, Version 2
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v3)
</td>
<td>Machined PEEK Nozzle Holder, Version 3
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Heat Sink
</td>
<td>Machined Aluminum Heat Sink
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_III-B">Mk III-B</span></h3>
<p>Summary: Added a heat sink in order to print PLA.
</p><p><a href="/wiki/File:Jhn_mk3_b_pic.jpg" class="image"><img alt="Jhn mk3 b pic.jpg" src="/mediawiki/images/thumb/0/0a/Jhn_mk3_b_pic.jpg/150px-Jhn_mk3_b_pic.jpg" width="150" height="133" srcset="/mediawiki/images/thumb/0/0a/Jhn_mk3_b_pic.jpg/225px-Jhn_mk3_b_pic.jpg 1.5x, /mediawiki/images/thumb/0/0a/Jhn_mk3_b_pic.jpg/300px-Jhn_mk3_b_pic.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v1.x)
</td>
<td>Machined Brass Nozzle/Heater Combination, Version 1.x
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v3)
</td>
<td>Machined PEEK Nozzle Holder, Version 3
</td></tr>
<tr>
<td>1
</td>
<td>Heat Sink (v1)
</td>
<td>Machined Aluminum Heat Sink, Version 1
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_IV">Mk IV</span></h3>
<p>Summary: Removed the heat sink and added a series of vents to provide cooling. To reduce weight, an aluminum nozzle is used.
</p><p><a href="/wiki/File:Jhn_mk4.jpg" class="image"><img alt="Jhn mk4.jpg" src="/mediawiki/images/thumb/e/e7/Jhn_mk4.jpg/150px-Jhn_mk4.jpg" width="150" height="155" srcset="/mediawiki/images/thumb/e/e7/Jhn_mk4.jpg/225px-Jhn_mk4.jpg 1.5x, /mediawiki/images/thumb/e/e7/Jhn_mk4.jpg/300px-Jhn_mk4.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v2)
</td>
<td>Machined Aluminum Nozzle/Heater Combination, Version 2
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v4)
</td>
<td>Machined PEEK Nozzle Holder, Version 4
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_IV-B">Mk IV-B</span></h3>
<p>Summary: Removed the heat sink and added a series of vents to provide cooling.
</p><p><a href="/wiki/File:Jhn_mk4_b.jpg" class="image"><img alt="Jhn mk4 b.jpg" src="/mediawiki/images/thumb/e/e5/Jhn_mk4_b.jpg/150px-Jhn_mk4_b.jpg" width="150" height="164" srcset="/mediawiki/images/thumb/e/e5/Jhn_mk4_b.jpg/225px-Jhn_mk4_b.jpg 1.5x, /mediawiki/images/thumb/e/e5/Jhn_mk4_b.jpg/300px-Jhn_mk4_b.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v1.x)
</td>
<td>Machined Brass Nozzle/Heater Combination, Version 1.x
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v4)
</td>
<td>Machined PEEK Nozzle Holder, Version 4
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Support Washer
</td>
<td>Optional 1/2" Fender Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91090A114
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_V">Mk V</span></h3>
<p>Summary: Reduced the size and increased the length of the melt zone. To reduce weight, an aluminum nozzle is used.
</p><p><a href="/wiki/File:Jhn_mk5.jpg" class="image"><img alt="Jhn mk5.jpg" src="/mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/150px-Jhn_mk5.jpg" width="150" height="171" srcset="/mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/225px-Jhn_mk5.jpg 1.5x, /mediawiki/images/thumb/2/2a/Jhn_mk5.jpg/300px-Jhn_mk5.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v5)
</td>
<td>Machined Aluminum Nozzle/Heater Combination, Version 5
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v5)
</td>
<td>Machined PEEK Nozzle Holder, Version 5
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Flat Washer
</td>
<td>1/4" OD Flat Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 98032A436
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_V-B">Mk V-B</span></h3>
<p>Summary: Reduced the size and increased the length of the melt zone.
</p><p><a href="/wiki/File:Jhn_mk5b.jpg" class="image"><img alt="Jhn mk5b.jpg" src="/mediawiki/images/thumb/c/ce/Jhn_mk5b.jpg/150px-Jhn_mk5b.jpg" width="150" height="143" srcset="/mediawiki/images/thumb/c/ce/Jhn_mk5b.jpg/225px-Jhn_mk5b.jpg 1.5x, /mediawiki/images/thumb/c/ce/Jhn_mk5b.jpg/300px-Jhn_mk5b.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>
<tr>
<td>1
</td>
<td>J-Head Nozzle (v4)
</td>
<td>Machined Brass Nozzle/Heater Combination, Version 4
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>Nozzle Holder (v5)
</td>
<td>Machined PEEK Nozzle Holder, Version 5
</td>
<td>
</td></tr>
<tr>
<td>1
</td>
<td>PTFE liner (v1)
</td>
<td>1/8" ID, 1/4" OD PTFE tubing, Version 1
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 5033K31
</td></tr>
<tr>
<td>1
</td>
<td>Heater Resistor
</td>
<td>Axial, 5.6 ohm, 1%, 5W
</td>
<td>UB5C-5.6-ND
</td></tr>
<tr>
<td>1
</td>
<td>Thermistor 1
</td>
<td>EPCOS 100K
</td>
<td>B57560G104F
</td></tr>
<tr>
<td>1
</td>
<td>Hollow-lock socket set screw
</td>
<td>5/16-24 hollow-lock socket set screw
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 91301A150
</td></tr>
<tr>
<td>1
</td>
<td>Flat Washer
</td>
<td>1/4" OD Flat Washer
</td>
<td><a rel="nofollow" class="external text" href="http://www.mcmaster.com">McMaster-Carr</a> 98032A436
</td></tr></table>
<h3> <span class="mw-headline" id="Mk_V-BV">Mk V-BV</span></h3>
<p>Summary: As the old thermistor was discontinued, the Semitec thermistor was substituted.
</p><p><a href="/wiki/File:Jhn_mk5bv.jpg" class="image"><img alt="Jhn mk5bv.jpg" src="/mediawiki/images/thumb/5/50/Jhn_mk5bv.jpg/150px-Jhn_mk5bv.jpg" width="150" height="201" srcset="/mediawiki/images/thumb/5/50/Jhn_mk5bv.jpg/225px-Jhn_mk5bv.jpg 1.5x, /mediawiki/images/thumb/5/50/Jhn_mk5bv.jpg/300px-Jhn_mk5bv.jpg 2x" /></a>
</p>
<table border="1">
<tr>
<td><b>Quantity</b>
</td>
<td><b>Part</b>
</td>
<td><b>Description</b>
</td>
<td><b>Part Number</b>
</td></tr>