Stepper Motors

A stepper motor is used as an output in electronic circuits. The motor is a brushless DC electric motor that divides a full rotation into a number of equal steps.

The motor’s position can then be made to move and hold at one of these steps without any position sensor for feedback as long as the motor is carefully sized to the application in respect to torque and speed.

Multiple coils are organised in phases (groups). By energising each phase in sequence the motor will rotate, one step at a time.

Why and when to use a Stepper Motor?

With a computer controlled stepping you can achieve very precise positioning and/or speed control.
•Steppers move in precise repeatable steps, they are perfect to use where precise positioning is needed such as 3D printers, CNC and camera platforms.


•Some disk drives use stepper motors to position the read/write head.


•Precise increments of movement also allow for excellent control of rotational speed for process automation and robotics.


•A Stepper motor has maximum torque at low speeds, so they are a good choice for applications where low speed with high precision is needed.



Stepper motor types
•Bipolar drivers use H bridge circuitry to reverse the current flow through the phases. By energising the phases with alternating the polarity all the coils can be put to work turning the motor.


•Permanent magnet motors use a permanent magnet in the rotor. They operate based on the principle that minimum reluctance occurs with minimum gap, meaning the rotor points are attracted towards the stator magnet poles.


•Unipolar drivers always energise the groups in the same way. The common lead will always be negative. They can be implemented with simple transistor circuitry.



Advantages of step motors
•Low cost


•High reliability


•High torque at low speed


•Full torque at standstill

...
Read more Read less

Filters

Viewing 1 - 20 of 56 products
Results per page
Description Price Step Angle Holding Torque Number Of Wires Voltage Rating Frame Size Stepper Motor Type Shaft Diameter Current Rating Winding Arrangement Shaft Length Depth Number of Pole Pairs Resistance Per Phase Detent Torque
RS Stock No. 829-3500
Mfr. Part No.103H5210-5240
SGD44.75
Each
units
1.8° 0.51Nm 4 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 22.5mm 49.5mm - 4.8Ω -
RS Stock No. 878-7673
Mfr. Part No.103H7823-1740
SGD170.67
Each
units
1.8° 2.7Nm 4 24 V dc 60 x 60mm Single Shaft 8mm 4 A Bipolar 19.1mm 87.3mm - 2.4Ω -
RS Stock No. 829-3522
Mfr. Part No.4835728-1
SGD3.96
Each
units
- - 4 - - Bipolar, Unipolar - - Unipolar - - - - -
RS Stock No. 878-7777
Mfr. Part No.103H7123-5640
SGD98.39
Each
units
1.8° 1.0Nm 4 24 V dc 56 x 56mm Single Shaft 6.35mm 1 A Bipolar 19.1mm 55.3mm - 5.7Ω -
RS Stock No. 829-3506
Mfr. Part No.103H5210-0440
SGD46.94
Each
units
1.8° 0.37Nm 6 24 V dc 42 x 42mm Hybrid 5mm 1.2 A Unipolar 22.5mm 49.5mm - 3.3Ω -
RS Stock No. 878-7685
Mfr. Part No.103H7823-5740
SGD170.67
Each
units
1.8° 2.7Nm 6 24 V dc 60 x 60mm Single Shaft 8mm 2 A Bipolar 19.1mm 87.3mm - 9.5Ω -
RS Stock No. 878-7761
Mfr. Part No.103H5208-5210
SGD67.23
Each
units
1.8° 0.39Nm 4 24 V dc 42 x 42mm Bipolar, Unipolar 5mm 1 A Bipolar 22.5mm 40.5mm - 4.1Ω -
RS Stock No. 829-3525
Mfr. Part No.103H7126-5740
SGD69.40
Each
units
1.8° 1.6Nm 4 24 V dc 56 x 56mm Hybrid 6.35mm 2 A Bipolar 19.1mm 77.3mm - -
RS Stock No. 829-3544
Mfr. Part No.SP2566-5160
SGD208.98
Each
units
1.8° 1.7Nm 4 24 V ac 56 x 56mm Hybrid 6.35mm 2 A Bipolar 19.1mm 103.5mm - -
RS Stock No. 829-3528
Mfr. Part No.4835710-1
SGD3.96
Each
units
1.8° - 6 - - Bipolar, Unipolar - - Unipolar - - - - -
RS Stock No. 878-7705
Mfr. Part No.4837961-1
SGD8.68
Each
units
1.8° - 4 - - Bipolar, Unipolar - - Bipolar - - - - -
RS Stock No. 878-7755
Mfr. Part No.103H5205-0410
SGD63.58
Each
units
1.8° 0.20Nm 6 24 V dc 42 x 42mm Bipolar, Unipolar 5mm 1.2 A Unipolar 22.5mm 34.5mm - 2.4Ω -
RS Stock No. 878-7727
Mfr. Part No.SM2861-5151
SGD219.40
Each
units
1.8° 3.30Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 4 A Bipolar 28.5mm 67.5mm - 0.56Ω -
RS Stock No. 878-7691
Mfr. Part No.4837798-1
SGD10.22
Each
units
1.8° - 6 - - Bipolar, Unipolar - - Unipolar - - - - -
RS Stock No. 829-3512
Mfr. Part No.103H7123-5740
SGD56.46
Each
units
1.8° 1.0Nm 4 24 V dc 56 x 56mm Hybrid 6.35mm 2 A Bipolar 19.1mm 53.8mm - - -
RS Stock No. 878-7657
Mfr. Part No.SH3533-12U40
SGD152.80
Each
units
1.8° 0.12Nm 6 24 V dc 35 x 35mm Single Shaft 5mm 1.2 A Unipolar 18mm 35mm - 2.4Ω -
RS Stock No. 878-7758
Mfr. Part No.103H5205-5210
SGD63.58
Each
units
1.8° 0.27Nm 6 24 V dc 42 x 42mm Bipolar, Unipolar 5mm 1 A Bipolar 22.5mm 34.5mm - 3.4Ω -
RS Stock No. 878-7742
Mfr. Part No.SM2863-5251
SGD390.55
Each
units
1.8° 9.0Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 6 A Bipolar 28.5mm 128.5mm - 0.46Ω -
RS Stock No. 878-7660
Mfr. Part No.SH3537-12U40
SGD100.36
Each
units
1.8° 0.15Nm 6 24 V dc 35 x 35mm Single Shaft 5mm 1.2 A Unipolar 18mm 39mm - 2.7Ω -
RS Stock No. 878-7667
Mfr. Part No.103H7823-0440
SGD111.55
Each
units
1.8° 2.1Nm 6 24 V dc 60 x 60mm Single Shaft 8mm 2 A Unipolar 19.1mm 87.3mm - 2.7Ω -