Stepper Motor A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. - ppt download
The Basics of Stepper Motors | DigiKey
Slip Ring with 608 Bearing for 28BYJ-48 Stepper Motor by pantonvich - Thingiverse
12.7mm Hole Slip Ring Hollow Shaft through Bore Rotating Miniature Electrical Connector 6 Wires 10A|Stepper Motor| - AliExpress