2pcs RepRap J-Head MKIV Hotend Nozzle 3D Printer Aluminum -3mm diameter filament

Description

RepRap J-Head  Hotend Nozzle
RepRap J-Head  Hotend Nozzle
MKIV
Quantity
Part
Description
Remark
1
J-Head Nozzle (v1.x)
Machined Aluminum Nozzle/Heater Combination, Version 1.x
1
Nozzle Holder (v4)
Machined PEEK Nozzle Holder, Version 4
1
PTFE liner
3mm ID, 6mm OD PTFE tubing for 3mm diameter filament
or 2mm ID, 3mm OD PTFE tubing for 1.75mm diameter filament
Fit the Nozzle and the holder
1
Heater Resistor
6mm diameter, 20mm length, 12V 30~40Watts, 1m wires
1
Thermistor
100K
B=3950
1
Hollow-lock socket set screw
M3 hollow-lock socket set screw
Fit the Nozzle, from Imperial to Metric
this kind is for 3.00mm diameter filament,Nozzle is 0.4mm diameter
The design of blue  part is in order to use more stable, It does not affect the accuracy, before useing, you need to remove the blue plastic part.
Advantages
Internally, the filament path is identical to that of an already proven design.
The design is simple as the number of custom machined parts is kept to a minimum.
If necessary, the PTFE liner can be replaced by using an off-the-shelf piece of PTFE tubing.
The PTFE is not stressed nor used to provide support. This reduces a point of failure that is part of other designs.
A resistor is used as a heater. There is no need to wrap nichrome wire or to bake a heater core.
Heat transmission is improved as there is no thermal junction where a separate heater screws onto the nozzle.
With most versions weighing in at under 25 grams and the lightest version weighing in at under 13 grams, this design is very light.
Disadvantages
Considerable machining is required
Package:2pcs nozzles
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