0.3MM/3MM Metal J-head Hotend 3D Printer Extruder For 1.75/3mm Filament RepRap MakerBot Sliver Silver

Features:
The Bowden principle
The Bowden cable lets you reduce the moving mass of the extruder and thus allowing faster controlled motion, less shaking of your machine, less energy use andimportantly: faster printing! Normally the mechanism that drives the filament into the hot end (where it melts) is directly on top of the extruder. This creates problems of balance and oscillations with faster motion which you can see in your printing results and hear and feel when your machine is shaking.
If the filament drive mechanism is placed on a non-moving part of the 3D printer, it can be pushed into a tube. PTFE (Teflon) is useful because it is slippery: it has little friction with the plastic.This limits wear and loss of energy. The tubes end is connected to the extruders hot-end.
The concept of using a Bowden cable as guide was suggested and pioneered by Ed Sells.

The main advantages
All metal enables working with Polycarbonate up to 300 degrees Celsius and with future materials that require higher working temperatures beyond those supportedby plastic extruders and hot end.
Tested with PLA, ABS, polycarbonate, nylon and PVA.
The J-head is assembled with 100K NTC thermistor and Cartridge heater,NOT heat resistor.Check the following
specifications for the assembled heater.









Specification:
Materail: Stainless Steel,PVC,Nylon
Voltage: 12V
: 40w
Wire Length :1m
Heater size: 6 x 15mm(D*L)
Model Nozzle size Filament size A 0.2mm 1.75mm B 0.3mm 1.75mm 0.4mm 1.75mm D 0.5mm 1.75mm E 0.2mm 3mm F 0.3mm 3mm G 0.4mm 3mm H 0.5mm 3mm


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