28BYJ-48 Small Reduction Stepper Motor

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 32 step (11.25 degree) per revolution, and inside is a 1/16 reduction gear set. (Actually its 1/16.032 but for most purposes 1/16 is a good enough approximation) What this means is that there are really 32*16.032 steps per revolution = 513 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.

Technical Specification

• Unipolar stepper with 0.1" spaced 5-pin cable connector
• 32 steps per revolution
• 1/16.025 geared down reduction
• 5V-12V DC suggested operation
• Weight: 37 g.
• Dimensions: 28mm diameter, 20mm tall not including 9mm shaft with 5mm diameter 9" / 23 cm long cable
• Holding Torque @ 12VDC: 250 gram-forcecm, 25 Nmm/ 3.5 oz-force*in
• Shaft: 5mm diameter flattened