J Head Nozzle
Release status: working
Description | 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.
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License | GPL
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Contributors | |
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CAD Models | |
External Link |
Contents
Introduction
NOTE: All Research and Development on J-Head Hot-ends has stopped due to the availability of cheap chinese counterfeits that have been spammed throughout the online markets, don't work well, and have no support.
Suppliers
Differences Between Real J-Heads and Cheap Clones
- HotEnds.com <--- Original designer
- 3DMakerWorld.com US
- Charlie's 3D Technologies
- MakerFarm.com
- RepRap-USA
- Plastic2Print Europe
- reprapsource
- eMotion Tech reprap-france.com
- TriDPrinting.com HotEnds Seattle
- Ultibots Hot Ends
clones - removed see discussion page
Parts List
Mk I
Summary: First J-Head hot-end.
Mk II
Summary: Added a hollow set-screw to retain the PTFE liner.
Mk III
Summary: Added a heat sink in order to print PLA. To reduce weight, an aluminum nozzle is used.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v2) | Machined Aluminum Nozzle/Heater Combination, Version 2 | |
1 | Nozzle Holder (v3) | Machined PEEK Nozzle Holder, Version 3 | |
1 | Heat Sink | Machined Aluminum Heat Sink | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Support Washer | Optional 1/2" Fender Washer | McMaster-Carr 91090A114 |
Mk III-B
Summary: Added a heat sink in order to print PLA.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v1.x) | Machined Brass Nozzle/Heater Combination, Version 1.x | |
1 | Nozzle Holder (v3) | Machined PEEK Nozzle Holder, Version 3 | |
1 | Heat Sink (v1) | Machined Aluminum Heat Sink, Version 1 | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Support Washer | Optional 1/2" Fender Washer | McMaster-Carr 91090A114 |
Mk IV
Summary: Removed the heat sink and added a series of vents to provide cooling. To reduce weight, an aluminum nozzle is used.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v2) | Machined Aluminum Nozzle/Heater Combination, Version 2 | |
1 | Nozzle Holder (v4) | Machined PEEK Nozzle Holder, Version 4 | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Support Washer | Optional 1/2" Fender Washer | McMaster-Carr 91090A114 |
Mk IV-B
Summary: Removed the heat sink and added a series of vents to provide cooling.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v1.x) | Machined Brass Nozzle/Heater Combination, Version 1.x | |
1 | Nozzle Holder (v4) | Machined PEEK Nozzle Holder, Version 4 | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Support Washer | Optional 1/2" Fender Washer | McMaster-Carr 91090A114 |
Mk V
Summary: Reduced the size and increased the length of the melt zone. To reduce weight, an aluminum nozzle is used.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v5) | Machined Aluminum Nozzle/Heater Combination, Version 5 | |
1 | Nozzle Holder (v5) | Machined PEEK Nozzle Holder, Version 5 | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Flat Washer | 1/4" OD Flat Washer | McMaster-Carr 98032A436 |
Mk V-B
Summary: Reduced the size and increased the length of the melt zone.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v4) | Machined Brass Nozzle/Heater Combination, Version 4 | |
1 | Nozzle Holder (v5) | Machined PEEK Nozzle Holder, Version 5 | |
1 | PTFE liner (v1) | 1/8" ID, 1/4" OD PTFE tubing, Version 1 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 1 | EPCOS 100K | B57560G104F |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Flat Washer | 1/4" OD Flat Washer | McMaster-Carr 98032A436 |
Mk V-BV
Summary: As the old thermistor was discontinued, the Semitec thermistor was substituted.
Quantity | Part | Description | Part Number |
1 | J-Head Nozzle (v4.1) | Machined Brass Nozzle/Heater Combination, Version 4 | |
1 | Nozzle Holder (v5) | Machined PEEK Nozzle Holder, Version 5 | |
1 | PTFE liner (v2) | 1/8" ID, 1/4" OD PTFE tubing, Version 2 | McMaster-Carr 5033K31 |
1 | Heater Resistor | Axial, 5.6 ohm, 1%, 5W | UB5C-5.6-ND |
1 | Thermistor 5 | Semitec | 104GT-2 or 104NT-4-R025H42G |
1 | Hollow-lock socket set screw | 5/16-24 hollow-lock socket set screw | McMaster-Carr 91301A150 |
1 | Flat Washer | 1/4" OD Flat Washer | McMaster-Carr 98032A436 |
Mk VI-B
Not released due to cheap chinese counterfeits of J-head hot-ends. The innovation and production of new J-Head hot-ends has stopped due to chinese counterfeits that do not follow the specifications and have ruined the reputation of the product.
Mk 7-B
Not released due to cheap chinese counterfeits of J-head hot-ends. The innovation and production of new J-Head hot-ends has stopped due to chinese counterfeits that do not follow the specifications and have ruined the reputation of the product.
Mk 8
Only available through special order at http://www.hotends.com
Summary: Improved J-head with a better internal seal, axial thermistor, heater cartridge, and a fluted PEEK nozzle holder design. No kapton tape is required.
This design will not be publically released due to cheap chinese counterfeits of J-head hot-ends. The innovation and production of new J-Head hot-ends has stopped due to chinese counterfeits that do not follow the specifications and have ruined the reputation of the product.
Notes
Nozzle Orifice
Drill bit sizes and conversions
As drill bits usually drill holes slightly larger than their rated size, the following drill bits are used to drill out the orifice of J-Head nozzles:
Rated Size | SAE Drill Bit Used | Actual Metric Size |
0.25mm | 0.0098 | 0.2489 |
0.30mm | 0.0118 | 0.2997 |
0.35mm | 0.0135 | 0.343 |
0.40mm | 0.0157 | 0.399 |
0.50mm | 0.0189 | 0.480 |
0.60mm | ||
0.70mm | ||
0.75mm | ||
0.80mm | ||
0.90mm | ||
1.00mm | N/A | 1.00 |
Notes:
- More sizes will be added as they become available.
- Smaller drill bits are used in order to keep the orifice size within the rated size and to increase the lifespan of the nozzle by ensuring that the orifice size will "wear to size" in the event that the orifice is slightly enlarged for any reason. (i.e. by cleaning with a piece of thin wire).
Nozzle orifice length
- Mk IV hot-ends (up to the middle of May 2012), and earlier models, had a nozzle orifice length of approximately 1.25mm.
- Mk IV hot-ends (after the middle of May 2012) and Mk V hot-ends have a nozzle orifice length of approximately 0.50mm.
Note: Due to the nature of 5c collets, the nozzle orifice length can vary as much as 0.25mm.