Festo MTRE-ST-42-48S-AA
Stepper Motor

Festo is a German automation company that produces and sells pneumatic and electrical control systems and drive technology for factories and process automation.

Stepper motors enable precise positioning operations, and so they are used when high accuracy is required for demanding positioning tasks. They consist of a stationary stator and a rotor rotating inside it, which is driven by torque generated by differently aligned magnetic fields in the stator and rotor. The rotor always turns in such a way that the greatest possible magnetic flux is created. Stepper motors are primarily used in factory automation, but are also increasingly being used in machine and plant building.
Advantages of stepper motors

Stepper motors are characterised by a very high torque at a low rotational speed. This enables the application to be both started quickly and – thanks to the high holding torque – to be stopped easily too. The direction of rotation can also be changed quickly and at any time. Other important advantages of stepper motors are the high accuracy they offer during operation and the easy monitoring of the rotor position. In addition, stepper motors do not have brushes, which contributes significantly to the high mechanical resistance of the application.
The different types of stepper motors

Basically, there are three different types of stepper motors: the reluctance stepper motor, the permanent magnet stepper motor and the hybrid stepper motor. The latter combines the properties of reluctance and permanent magnet stepper motors and is thus the most efficient of the three versions. Hybrid stepper motors have a stator with stator poles with multiple teeth and a rotor consisting of up to 200 teeth that can move at step angles of 1.8° each. Hybrid stepper motors have a high static and dynamic torque as well as a very high stepping speed and are therefore used in numerous applications, including PC drives and printers. The main application areas for hybrid stepper motors in industry are machine tools and handling machines.

Technical Specifications
Stepper angle at full step 1.8 deg
Stepper angle tolerance ±5%
Operating voltage range DC 24 ... 48 V
Insulation protection class B
Nominal voltage DC 48 V
Nominal motor current 1.2 A
CE mark (see declaration of conformity) to EU directive for EMC
Storage temperature -25 ... 60 °C
Relative air humidity 45 - 80 %
Protection class IP54
Ambient temperature 0 ... 50 °C
Authorisation C-Tick
Overall mass moment of inertia at power take-off 0.068 kgcm2
Motor holding torque 0.34 Nm
Mass moment of inertia of rotor 0.068 kgcm2
Permissible axial shaft load 7 N
Permissible radial shaft load 18 N
Product weight 450 g
Electrical connector system Plug