This post explains for the Stepping Motor.
The Part Number is M42SP-6NK.
Preview images :
M42SP-6NK is Stepping Motor.
1. High response.
2. High output torque.
3. Superior running quietness and stability.
OUTLINE “M42SP-6NK” has acquired the highest response among the outer diameter 42mm model series-holding torque : 41.2mN·m, pullout torque : 21.6mN·m/800pps, and pull-in torque : 25.5mN·m/200pps (12V DC). With superior running noiselessness and other features, this model motor is the most suited to future, compact electronic equipment.
Printers, typewriters, word processors, facsimiles, copy machines. […]