Assembled GT7 Extruder 0.3-0.5mm Nozzle J-Head Hotend For 3D Printer

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Assembled GT7 Extruder 0.3-0.5mm Nozzle J-Head Hotend For 3D Printer

Available options: Filament 1.75mm Nozzle 0.3mm/Filament 3mm Nozzle 0.3mm/Filament 1.75mm Nozzle 0.35mm/Filament 3mm Nozzle 0.35mm/Filament 1.75mm Nozzle 0.4mm/Filament 3mm Nozzle 0.4mm/Filament 1.75mm Nozzle 0.5mm/Filament 3mm Nozzle 0.5mm/
**NOTE: Please let us know which option you want to receive via the message on checkout step (if there are multi options)

Assembled GT7 Extruder 0.3-0.5mm Nozzle J-Head Hotend For 3D Printer


Material: Metal
Weight: 490g
Outline dimensions: 88 x 42 x 101 mm (L / W / H)
Nozzle diameter: 0.3mm, 0.35mm, 0.4mm, 0.5mm
Nozzle temperature: 180°C - 240°C
Suitable for 1.75mm / 3mm PLA & ABS (not included)
Printing resolution: 0.1mm
Molding form: FDM
Printing thickness: 0.1mm - 0.3mm
Flow rate in nozzle: about 24cc/h
Movement speed: 50cc
Recommended input voltage: 12V
Stepper motor operating voltage: 12V
Cooling fan operating voltage: 12V
Heating voltage of extruding head: 12V
Thermistor: 100K 1% high-precision NTC thermistor


1. 42 Stepper motor
2 Phase
Weight: 0.4kg
Step Angle: 1.8±5% degree
Voltage: 12V DC
Current: 12A / phase
Holding torque: Min.
Phase Resistance: 10.0±10% Ω(phase)
Phase Inductance: 20±20%mH(phase)
Rotor torque:^2
Braking torque: MAX.
Insulation class: B(130)

2. Cooling fan
Dimensions: 40 x 40 x 15 mm (3Pin)
Voltage: 12V DC
Current: 0.11A
Small size full of energy to make your printer pretty cool.

3. J-head nozzle
12V thermocouple
Thermistor: 100K 1% high-precision NTC thermistor
Suitable for 1.75mm, 3mm filament ABS / PLA (not included)
Nozzle: 0.3mm, 0.35mm, 0.4mm, 0.5mm

Package included:

1 x GT7 extruder

    • Brand TechDaddy
    • Mfg Part # TDBG950339
Payment Methods
Shipping USPS, $1.99
Shipping Policy

We will arrange shipping for you within 3 days after payment cleared except the holidays.
- Estimated delivery time from date of shipment is 12-21 working days from our warehouse in China, over 80% of our customers receive the products within 20 working days (please note that these are estimates; post office and customs delays can occur, if so, please check the information at your local post office, if you still can not get the package, please contact us.
-We ship items to Worldwide.

Return/Exchange Policy

We accept return in 30 days

Other Policies


If you send email to us, In our working hours will be resumed within 24 hours.
If you we are not satisfied with the product or service, please contact me and don't give us negative or natural feedback. We must give you a satisfactory solution. Thank you!

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