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

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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. 829-3544
Mfr. Part No.SP2566-5160
€148.57
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. 921-1347
Mfr. Part No.AM0820-V3-18-08 C06.072A 08/1 256:1
BrandFaulhaber
€468.65
Each
units
18° 0.65mNm 4 3 V dc - Bipolar, Unipolar 2.34mm 150 mA Bipolar 3.85mm 16.75mm 2 18Ω 0.17mNm
RS Stock No. 878-7730
Mfr. Part No.SM2863-5151
€255.67
Each
units
1.8° 9.0Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 4 A Bipolar 28.5mm 128.5mm - -
RS Stock No. 878-7705
Mfr. Part No.4837961-1
€5.62
Each
units
1.8° - 4 - - Bipolar, Unipolar - - Bipolar - - - - -
RS Stock No. 878-7676
Mfr. Part No.103H7823-0740
€110.72
Each
units
1.8° 2.1Nm 6 24 V dc 60 x 60mm Single Shaft 8mm 3 A Unipolar 19.1mm 87.3mm - 1.25Ω -
RS Stock No. 878-7720
Mfr. Part No.SM2862-5151
€257.47
Each
units
1.8° 6.4Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 4 A Bipolar 28.5mm 98mm - 0.83Ω -
RS Stock No. 191-8362
BrandRS PRO
€51.36
Each
units
1.8° 0.88Nm 8 5.4 V dc 56.4 x 56.4mm Hybrid 6.35mm 1.4 A - 116.6mm 76mm - 3.6Ω -
RS Stock No. 441-0401
Mfr. Part No.16HS-012
€95.94
Each
units
1.8° 87mNm 4 12 V dc 39 x 39mm Hybrid 5mm 600 mA Bipolar 12mm - 1 6.6Ω -
RS Stock No. 878-7702
Mfr. Part No.103H8222-6340
€257.47
Each
units
1.8° 5.1Nm 4 100 V ac 85.85 x 85.85mm Single Shaft 12mm 6 A Bipolar 28.48mm 93.73mm - 0.35Ω -
RS Stock No. 892-8741
BrandRS PRO
€192.30
Each
units
1.8° 2.2Nm 8 4.17 V, 6 V, 8.4 V 60 x 60mm Hybrid, Permanent Magnet 7.5mm 2 A Parallel, Series, Unipolar 22.4mm 110mm 1 -
RS Stock No. 440-290
Mfr. Part No.82930015
BrandCrouzet
€41.85
Each
units
7.5° 0.16Nm 6 12.5 V - Permanent Magnet 4mm 390 mA Unipolar 14.4mm 35.4mm 2 32Ω -
RS Stock No. 180-5290
BrandRS PRO
€106.42
Each
units
1.8° 2.3 (Unipolar) nm, 2.8 (Parallel) nm, 2.8 (Series) nm 8 2.54 V, 3.64 V, 5 V 82.5 x 82.5mm Hybrid 9.52mm 1.96 (Series) A, 2.8 (Unipolar) A, 3.92 (Parallel) A Parallel, Series, Unipolar 28.9mm 67mm - 0.65 (Parallel) , 1.3 (Unipolar) , 2.6 (Series) -
RS Stock No. 180-5291
BrandRS PRO
€130.18
Each
units
1.8° 3.8 (Unipolar) nm, 4.8 (Parallel) nm, 4.8 (Series) nm 8 2.54 V, 4.76 V, 6.6 V 82.5 x 82.5mm Hybrid 9.52mm 1.96 (Series) A, 2.8 (Unipolar) A, 3.92 (Parallel) A Parallel, Series, Unipolar 28.9mm 94mm - 0.85 (Parallel) , 1.7 (Unipolar) , 3.4 (Series) -
RS Stock No. 892-8726
BrandRS PRO
€74.45
Each
units
1.8° 30mNm 4 4.32 V 20.2 x 20.2mm Hybrid, Permanent Magnet 4mm 800 mA - 5mm 48.5mm 1 5.4Ω -
RS Stock No. 181-6681
Mfr. Part No.EMMS-ST-42-S-SEB-G2
BrandFesto
€512.83
Each
units
1.8° - - 48 V dc - Hybrid 5mm 1.8 A - 24mm 127mm - 1.75Ω -
RS Stock No. 181-6685
Mfr. Part No.EMMS-ST-57-S-SEB-G2
BrandFesto
€525.71
Each
units
1.8° - - 48 V dc - Hybrid 6.35mm 5 A - 20.6mm 138mm - 0.15Ω -
RS Stock No. 136-6701
Mfr. Part No.2H4233B05R220
€118.44
Each
units
1.8° 0.26Nm 4 36 V 42 x 42mm Bipolar 5mm 480 mA Bipolar 24mm 42mm - 14Ω -
RS Stock No. 892-9170
Mfr. Part No.P530-258-004.10
BrandPortescap
€181.86
Each
units
3.6° 0.18Nm 8 - - Disc Magnet - 700 mA Bipolar - - 1 - 10mNm
RS Stock No. 183-3582
Mfr. Part No.SF2423-10B41
€49.06
Each
units
1.8° 0.80Nm 4 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 24mm 59.5mm - 6.5Ω -
RS Stock No. 180-5287
BrandRS PRO
€52.53
Each
units
1.8° - 6 5.7 V 56.4 x 56.4mm Hybrid 6.35mm 1 A Unipolar 19mm 76mm - 5.7Ω -
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