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Stepper Motor - 0.35kg.cm 5V

by OEM

The 28BYJ-48 is a small stepper motor suitable for a large range of applications. 

19-00012858
Gross Weight: 0.04kg
Company: OEM
Made in: China
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Without VAT 2.02

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DESCRIPTION

This is a great first stepper motor, good for small projects and experimenting with steppers. This uni-polar motor has a built in mounting plate with two mounting holes. There are only 8 steps per revolution, but inside is a 1/64 reduction gear set. What this means is that there are really 8*64 steps per revolution = 512 steps! The shaft is flattened so its easy to attach stuff to it with a set-screw. A perfect first stepper motor and works well with the Motor Shield for Arduino. 

The gearing has a few side effects which are important to note. First, you can turn the stepper by hand but not as smoothly as an un-geared stepper. It also means you shouldn't use interleaved or micro-stepping to control or it will take forever to turn. Instead use single or double stepping. The torque is fairly high but its slower than un-geared steppers - we maxed out at about 80 RPM by over-driving it a bit with 9VDC. 

To use with the Adafruit Motor Shield, connect red to ground (middle), orange and pink to one motor port (say M1) and blue and yellow to the other motor port (say M2). So in order, thats: orange - pink - red - blue - yellow. Then just use the example code that comes with the Adafruit Motor Shield library and set the constructor to AF_Stepper motor(512, motornum) and the speed at 5 RPM by calling motor.setSpeed(5). Otherwise, you can also wire it up with some transistors and use the Arduino Stepper library.

SPECIFICATIONS

Holding Torque:
0.35kg.cm
Rated Voltage:
5Volt

SPECIFICATIONS

  • Rated voltage: 5VDC
  • Number of pole: 4
  • Speed variation ratio: 1/64
  • Stride angle: 5.625°/64
  • DC resistance: 200 Ohm±7% (25°C)
  • Idle in-traction frequency: >600Hz
  • Idle out-traction frequency: >1000Hz
  • In-traction Torque: 0.35 kg.cm (34.3mN.m)
  • Self-positioning Torque:  0.35 kg.cm (34.3mN.m)
  • Dimensions:
    • Diameter: 28mm 
    • Tall: 20mm
    • Shaft:
      • Length: 9mm
      • Diameter flattened: 5mm 
    • Cable: 23cm 
    • Weight: 37 g