Pulley GT2 20 Teeth 8mm Bore Aluminum 3D Printer Reprap

It has an Atmega2560 chip running at 16Mhz with a factory loaded bootloader with 54 digital input / output pins (from which 14 can be used as PWM outputs) and 16 analog inputs, 4 UART (hardware serial ports). The board includes a USB connector, an ICSP port, a reset button and some status LEDs. Atmega16U2 programmed as a USB-to-serial converter. Simply connect it to a computer with a USB cable or power with a power adapter and DC connector.

Characteristic:
- Motor passes 1.8º (200 steps per turn)
- Capable of loading 1.22 kg / cm

High quality flexible aluminum coupler, so you can join Nema 17, 6.35mm stepper motors to an 8mm threaded rod. They incorporate 4 captive screws so you can perfectly fix the couplings to the rod. Flexible Coupler 6.35mm/8mm shaft features:
- Material: Aluminum alloy
- Coupler height ( L): 25 mm
- Outside diameter: 19mm
- Shaft diameter: 6.35mm / 8mm - Quantity 2 units

Fan 12V 2x 3D Printer Cables features:
- Voltage: 12V
- Consumption: 65mA
- Speed: 3800rpm -5600rpm - Noise level: 25dB ± 10%
- Screw diameter: 4.5mm
- Service Life Time: 35000 hours
- Operating temperature: -10 ° C to 65 ° C
- Cable length: 11cm
- Dimensions: 40mm x 40mm x 10mm

Blue 2 pole PCB mount screw terminal 5.08mm pitch Printed Circuit Board Terminal 2 poles 5.08mm pitch features:
Number of Contacts: 2
Pitch: 5.08mm
Number of Rows: 1
Mounting Type: PCB
Gender: Male
Allowable Section: 1.5mm2 (22- 14 AWG)
Termination method: screw
Type: screw terminal block
Nominal current: 16A
Nominal voltage: 250V
Color: blue
Material: Nylon 66
Depth: 10mm
Width: 7.5mm
Length: 10mm

Pulley GT2 20 Teeth 6mm Aluminium Pulley 3D Printer Reprap features:
- Number of teeth: 20
- Pitch: 2mm
- Material: Aluminum alloy
- Outside diameter: 18mm
- Inner hole: 5mm
- Use with strap: 6mm and 6.35mm
- Ideal to fix on the axis of the motors of your 3D printer

Relay Module DC 12V 10A 1 Channel Low/High Trigger features:
- Channel: 1 (protected with Optocoupler)
- Supply voltage: 12V
- Output Current: 10A
- Relay activation current: 15mA ~ 20mA
- Insulation: Yes
- Trigger signal type jumper (low / high)
- LED indicator
- Dimensions: 30x 54mm
- Has a jumper that allows to choose type of trigger signal (low / high)