42 stepper motor refers to a type of motor whose motor dimensions are 42mm x 42mm. It has high positioning accuracy, excellent control performance and stable and reliable operation characteristics.
42 STEPPER MOTOR REFERS TO A STEPPER MOTOR WITH A MOUNTING BASE SIZE OF 42MM, AND ITS MAXIMUM OUTPUT TORQUE IS 0.5NM.
57 STEPPER MOTOR REFERS TO A STEPPER MOTOR WITH A MOUNTING BASE SIZE OF 57MM, AND ITS MAXIMUM OUTPUT TORQUE IS 3.0NM.
The 42 stepper motor is characterized by its 4 phases, each phase difference is 90 degrees, one step is one phase excitation, each stepper motor is able to produce precise step motion, which makes it ideal for applications that require accurate control of motion. In the control of mechanical equipment, the 42-stepper motor can accurately control the speed and direction of movement of the motor by controlling the current.
42 stepper motor features: This series of motors has the characteristics of large output torque, low temperature rise, low noise and low vibration, and high reliability and stability. The motor runs smoothly without obvious oscillation zone, which can meet the use of different working conditions in the automation industry.
42 stepper motors have a wide range of applications in the motion control of mechanical equipment, such as CNC machine tools, textile machinery, printing machines, winding machines, laser processing machines, smart homes and so on.
In practice, the performance and stability of a 42-stepper motor depends on the drive and controller used. 
Therefore, when choosing a 42-stepper motor, it is necessary to select the appropriate drive and controller according to actual needs to give full play to the advantages of the 42-stepper motor.