J Head Nozzle

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Revision as of 20:02, 29 September 2015 by Reifsnyderb (talk | contribs) (Mk I)
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J-Head Nozzle

Release status: working

Jhn mk5.jpg
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.
License
GPL
Author
Contributors
Based-on
Categories
CAD Models
none
External Link


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.


Jhn nozzles.jpg

Suppliers


Differences Between Real J-Heads and Cheap Clones


clones - removed see discussion page

Parts List

Mk I

Summary: First J-Head hot-end.

Jhn mk1.jpg

Mk II

Summary: Added a hollow set-screw to retain the PTFE liner.

Jhn mk2.jpg

Quantity Part Description Part Number
1 J-Head Nozzle (v1.x) Machined Brass Nozzle/Heater Combination, Version 1.x
1 Nozzle Holder (v2) Machined PEEK Nozzle Holder, Version 2
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

Summary: Added a heat sink in order to print PLA. To reduce weight, an aluminum nozzle is used.

Jhn mk3.jpg

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.

Jhn mk3 b pic.jpg

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.

Jhn mk4.jpg

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.

Jhn mk4 b.jpg

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.

Jhn mk5.jpg

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.

Jhn mk5b.jpg

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.

Jhn mk5bv.jpg

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:

  1. More sizes will be added as they become available.
  2. 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

  1. Mk IV hot-ends (up to the middle of May 2012), and earlier models, had a nozzle orifice length of approximately 1.25mm.
  2. 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.