OctagonStar Flexible Couplings 5mm to 8mm NEMA 17 Shaft for RepRap 3D Printer or CNC Machine(2PCS)

Flexible shaft couplers used in small CNC machines and 3D printers such as Prusa i3 or ORD Bot.
Flex capability of the coupler removes stress when shafts are not aligned perfectly.
Brand Listing, If you buy is not OctagonStar brand product, You Can Apply for a Refund and Compensation.

Product Features

  • Flexibility of this coupler removes stress between motor and driving component.
  • Compatible with NEMA 17 stepper motors (for 5mm to 8mm shaft diameter).
  • Useful in RepRap 3D Printers and small CNC machines.
  • Dimensions: 19mm x 25mm.
  • NOTE:OctagonStar Quality Assurance.Item package or product surface have OctagonStar brand identity. If you feel to buy isn’t OctagonStar item, you can return or exchange.

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alkeke Flexible Couplings 5mm to 8mm NEMA 17 Shaft for RepRap 3D Printer or CNC Machine(2PCS)

New Precision Aluminum Flexible Shaft Coupler Grub screws (2x Top & 2x Bottom) Coupler Diameter: 18mm Top Shaft Diameter: 8mm,Bottom Shaft Diameter: 5mm Coupler Height: 25mm Top Shaft Diameter: 8mm Bottom Shaft Diameter: 5mm Coupler Height: 25mm Coupler Diameter: 18mm Weight: 17g (approx) Meterial: Aluminium. 4 Grub screws (2x Top & 2x Bottom) High Quality Aluminium Shaft coupler.Ideal for Stepper Motor, Servo Motor, Screw Driving connections.Complete Brand New and Quality Checked for Best Quality Product Description Flexible shaft couplers used in small CNC machines and 3D printers such as Prusa i3 or ORD Bot. Flex capability of the coupler removes stress when shafts are not aligned perfectly. Package Contents 2 x Shaft coupler 5mm to 8mm.

Product Features

  • Flexibility of this coupler removes stress between motor and driving component
  • Aluminum alloy as raw material: torsionally stiff with dampening and lightweight for low intertia
  • Since it is a single piece metallic flexible coupling, there does not exhibit the backlash
  • The flexing action compensates parallel, angular misalignment and shaft end-play Constant velocity and accommodate axial motion;

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Nema 14 Bipolar Stepper Motor 5.4V 0.8A 25.5oz.in/18Ncm 3D Printer

This hybrid bipolar Nema 14 stepper motor with 1.8 deg. step angle (200 steps/revolution).
Each phase draws 800 mA at 5.4 V, allowing for a holding torque of 18Ncm(25.5oz.in).

Electrical Specification:

* Manufacturer Part Number: 14HS13-0804S
* Motor Type: Bipolar Stepper
* Step Angle: 1.8 deg.
* Holding Torque: 18Ncm(25.5oz.in)
* Rated Current/phase: 0.8A
* Phase Resistance: 6.8ohms
* Inductance: 10mH+/-20%(1KHz)

Physical Specification:

* Frame Size: 35 x 35mm
* Body Length: 34mm
* Shaft Diameter: 5mm
* Shaft Length: 24mm
* D-cut Length: 16.5mm
* Number of Leads: 4
* Lead Length: 400mm
* Weight: 190g

Connection:

Black(A+), Green(A-), Red(B+), Blue(B-)

Warning:

Make sure the motor connect to a constant current or chopper drive controller before you test motor.
Connecting the motor directly to a power supply will destroy the motor.

Product Features

  • Middle Size with Hight Torque
  • 18Ncm(25.5oz.in) holding torque
  • NEMA 14 bipolar 1.38″x1.38″x1.34″ 4-wir
  • 1.8 deg. step angle(200 steps/rev)
  • Rated current 0.8A & resistance 6.8ohms

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Professional 3D printer CNC Kit for arduino, Kuman GRBL CNC Shield +UNO R3 Board + RAMPS 1.4 Mechanical Switch Endstop + DRV8825 A4988 GRBL Stepper Motor Driver with heat sink + Nema 17 Stepper Motor

CNC Shield Board:
Latest CNC Shield Version 3.0 for arduino
GRBL 0.9 compatible
4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)
2 x End stops for each axis (6 in total)
Coolant enable
Compatible with A4988 or DRV8825 stepper driver
Runs on 12-36V DC

DRV8825 Stepper Motor Driver:
Stepper motor driver (upgraded from A4988, 2.5 A max current/phase. It’s not arduino official board but it’s compatible with all arduino software and hardware)

Nema 17 Stepper motor Specification:
Model No.:17HD48002H-22B
Step Angle: 1.8 deg.
Holding Torque: 59Ncm(84 oz.in)
Rated Current/phase: 1.7A
Frame Size: 41 x 41mm
Body Length: 47mm
Shaft Diameter: 5mm
Shaft Length: 22mm
Weight: 380g

Mechanical Endstop Connection description:
Red line connect VCC (ramps of +)
black wire connect the GND (ramps of -)
Green Line connect SIGNAL (ramps in s)
Tips: Under normal circumstances, the system must be configured to at least three mechanical switches.
Advantage: Easy to install, the more common used styles
Length of Cable: 70 cm

Package Contents:
1 x CNC Shield Board
1 x Kuman UNO R3 Board 
4 x DRV8825 Stepper Motor Driver
4 x Aluminum heatsink w/ 3M tape backing
3 x Nema 17 stepper motor 1.7 A (with bracket and screw)
3 x Nema 17 Stepper Motor Mounting Bracket
12x M3 Screws for bracket of stepper motor
3 x Mechanical Switch Endstop
3 x 3Pin 70cm Cable
1 x 1.5m USB cable for R3 Board

Product Features

  • Latest CH340G CNC Shield expansion board Version 3.0 for Arduino
  • Kuman UNO R3 Board, MCU: ATmega328, USB interface: ATmega16U2 with 1.5m USB Cable
  • 4pcs DRV8825 Stepper Motor Driver with heat sinks
  • 3pcs NEMA-17 Stepper Motor 84 oz.in (59 Ncm) 47mm Body 1.8 degree with mounting Bracket Kit DIY 3D Printer CNC Robot with 3pcs Mounting Bracket and 12 pcs M3 Screws
  • 3pcs Endstop Mechanical Limit Switches for 3D printer RAMPS 1.4 with 3Pin 70cm Cable

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