Stepper Motors

Step, stepper or stepping motors are all names for brushless DC electric motors which work by dividing a full motor rotation into several equal steps. This enables the motor to move into position and hold there without any requirement for position sensors. Provided the motor is carefully programmed for its application, each step position can precisely govern the required torque and speed.

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  • Festo EMMS-ST-42-SS-SEB-G2 1460678
    Stepper motor


    Part No: EMMS-ST-42-SS-SEB-G2, 1460678

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.5Nm
    • Brake Holding Torque: 1Nm
    • Motor Flange Size: 42mm
    £863.94 (Ex VAT)
    £1036.73 (Inc VAT)
  • Festo EMMS-ST-87-M-S-G2 1370486
    Stepper motor


    Part No: EMMS-ST-87-M-S-G2, 1370486

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 5.9Nm
    • Motor Flange Size: 87mm
    £211.43 (Ex VAT)
    £253.71 (Inc VAT)
  • Festo EMMS-ST-28-L-SEB 1451382
    Stepper motor


    Part No: EMMS-ST-28-L-SEB, 1451382

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.09Nm
    • Brake Holding Torque: 0.4Nm
    • Motor Flange Size: 28mm
    £664.42 (Ex VAT)
    £797.30 (Inc VAT)
  • Festo EMMS-ST-87-M-SB-G2 1370488
    Stepper motor


    Part No: EMMS-ST-87-M-SB-G2, 1370488

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 5.9Nm
    • Brake Holding Torque: 2Nm
    • Motor Flange Size: 87mm
    £445.68 (Ex VAT)
    £534.82 (Inc VAT)
  • Festo EMMS-ST-57-M-SEB-G2 1370481
    Stepper motor


    Part No: EMMS-ST-57-M-SEB-G2, 1370481

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 1.4Nm
    • Brake Holding Torque: 1Nm
    • Motor Flange Size: 57mm
    £482.24 (Ex VAT)
    £578.69 (Inc VAT)
  • Festo EMMS-ST-57-M-SB-G2 1370480
    Stepper motor


    Part No: EMMS-ST-57-M-SB-G2, 1370480

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 1.4Nm
    • Brake Holding Torque: 1Nm
    • Motor Flange Size: 57mm
    £370.25 (Ex VAT)
    £444.30 (Inc VAT)
  • Festo EMMS-ST-42-S-SB-G2 1370472
    Stepper motor


    Part No: EMMS-ST-42-S-SB-G2, 1370472

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.5Nm
    • Brake Holding Torque: 1Nm
    • Motor Flange Size: 42mm
    £346.26 (Ex VAT)
    £415.51 (Inc VAT)
  • Festo EMMS-ST-87-L-SEB-G2 1370494
    Stepper motor


    Part No: EMMS-ST-87-L-SEB-G2, 1370494

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 9.3Nm
    • Brake Holding Torque: 2Nm
    • Motor Flange Size: 87mm
    £599.97 (Ex VAT)
    £719.96 (Inc VAT)
  • Festo EMMS-ST-42-S-S-G2 1370470
    Stepper motor


    Part No: EMMS-ST-42-S-S-G2, 1370470

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.5Nm
    • Motor Flange Size: 42mm
    £112.00 (Ex VAT)
    £134.40 (Inc VAT)
  • Festo EMMS-ST-57-S-SE-G2 1370475
    Stepper motor


    Part No: EMMS-ST-57-S-SE-G2, 1370475

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.8Nm
    • Motor Flange Size: 57mm
    £231.98 (Ex VAT)
    £278.38 (Inc VAT)
  • Festo EMMS-ST-87-L-S-G2 1370490
    Stepper motor


    Part No: EMMS-ST-87-L-S-G2, 1370490

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 9.3Nm
    • Motor Flange Size: 87mm
    £228.56 (Ex VAT)
    £274.27 (Inc VAT)
  • Festo EMMS-ST-87-L-SB-G2 1370493
    Stepper motor


    Part No: EMMS-ST-87-L-SB-G2, 1370493

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 9.3Nm
    • Brake Holding Torque: 2Nm
    • Motor Flange Size: 87mm
    £462.83 (Ex VAT)
    £555.40 (Inc VAT)
  • Festo EMMS-ST-87-L-SE-G2 1370491
    Stepper motor


    Part No: EMMS-ST-87-L-SE-G2, 1370491

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 9.3Nm
    • Motor Flange Size: 87mm
    £365.68 (Ex VAT)
    £438.81 (Inc VAT)
  • Festo EMMS-ST-42-S-SE-G2 1370471
    Stepper motor


    Part No: EMMS-ST-42-S-SE-G2, 1370471

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.5Nm
    • Motor Flange Size: 42mm
    £220.55 (Ex VAT)
    £264.66 (Inc VAT)
  • Festo EMMS-ST-57-S-SEB-G2 1370477
    Stepper motor


    Part No: EMMS-ST-57-S-SEB-G2, 1370477

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.8Nm
    • Brake Holding Torque: 0.4Nm
    • Motor Flange Size: 57mm
    £466.24 (Ex VAT)
    £559.48 (Inc VAT)
  • Festo EMMS-ST-57-M-S-G2 1370478
    Stepper motor


    Part No: EMMS-ST-57-M-S-G2, 1370478

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 1.4Nm
    • Motor Flange Size: 57mm
    £135.99 (Ex VAT)
    £163.19 (Inc VAT)
  • Festo EMMS-ST-57-M-SE-G2 1370479
    Stepper motor


    Part No: EMMS-ST-57-M-SE-G2, 1370479

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 1.4Nm
    • Motor Flange Size: 57mm
    £247.98 (Ex VAT)
    £297.57 (Inc VAT)
  • Festo EMMS-ST-28-L-SE 1430663
    Stepper motor


    Part No: EMMS-ST-28-L-SE, 1430663

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.09Nm
    • Motor Flange Size: 28mm
    £282.28 (Ex VAT)
    £338.73 (Inc VAT)
  • Festo EMMS-ST-87-S-SE-G2 1370483
    Stepper motor


    Part No: EMMS-ST-87-S-SE-G2, 1370483

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 2.5Nm
    • Motor Flange Size: 87mm
    £337.12 (Ex VAT)
    £404.55 (Inc VAT)
  • Festo EMMS-ST-57-S-S-G2 1370474
    Stepper motor


    Part No: EMMS-ST-57-S-S-G2, 1370474

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.8Nm
    • Motor Flange Size: 57mm
    £120.01 (Ex VAT)
    £144.01 (Inc VAT)
  • Festo EMMS-ST-87-S-SB-G2 1370484
    Stepper motor


    Part No: EMMS-ST-87-S-SB-G2, 1370484

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 2.5Nm
    • Brake Holding Torque: 2Nm
    • Motor Flange Size: 87mm
    £434.26 (Ex VAT)
    £521.11 (Inc VAT)
  • Festo EMMS-ST-87-M-SE-G2 1370487
    Stepper motor


    Part No: EMMS-ST-87-M-SE-G2, 1370487

    • Encoder Type: Incremental Encoder
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 5.9Nm
    • Motor Flange Size: 87mm
    £348.55 (Ex VAT)
    £418.26 (Inc VAT)
  • Festo EMMS-ST-28-L-SB 1451383
    Stepper motor


    Part No: EMMS-ST-28-L-SB, 1451383

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.09Nm
    • Brake Holding Torque: 0.4Nm
    • Motor Flange Size: 28mm
    £559.12 (Ex VAT)
    £670.94 (Inc VAT)
  • Festo EMMS-ST-57-S-SB-G2 1370476
    Stepper motor


    Part No: EMMS-ST-57-S-SB-G2, 1370476

    • Encoder Type: No Encoder Fitted
    • Motor Supply Voltage: 48V DC
    • Motor Holding Torque: 0.8Nm
    • Brake Holding Torque: 0.4Nm
    • Motor Flange Size: 57mm
    £354.26 (Ex VAT)
    £425.11 (Inc VAT)
Page 1 of 2

What are Stepper Motors?

Stepper motors are digital input-output devices and are controlled with digital pulses provided from the stepper motor controller. Stepper motors have multiple electromagnets positioned around a central gear-shaped iron core. These magnetically attract the teeth of each gear in turn and rotate the motor by a precise angle. A digital pulse from the controller moves the motor to move one increment one angle of motion, the increment is precise and the same every time, multiple digital pulses cause the movement to change into a continuous rotation. If a stepper motor were connected to an alternating current, the stepper motor would rotate continuously.

Stepper motors are used in applications where the complexity of a servo motor is not required; examples include; pick and place, winding tools and machine tools. Choosing a stepper motor requires the designer to know the torque and speed of the application. Once the torque and speed are known these can then be compared against the manufacturer's torque-speed curve for correct stepper motor selection. Stepper motors are available in three basic forms; permanent magnet step motor, variable reluctance stepper motor and a hybrid stepper motor that is a combination of both permanent magnet and variable reluctance stepper motors. The stepper motors from Festo are all hybrid stepper motors.

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