DC Motors

DC motors are the most widely used type of motor with initial costs typically less than AC systems for low-power units. DC motors can be used for a wide range of applications from small tools and appliances, through to electric vehicles, lifts and hoists. DC Motors speed can be controlled by varying the supply voltage and are available in a wide range of voltages, however the most popular type are 12 V and 24 V, with some of the advantages being:

  • Easy installation
  • Speed control over a wide range
  • Quick Starting, Stopping, Reversing and Acceleration
  • High Starting Torque
  • Linear speed-torque curve

Types of DC Motors
There are two common types of DC motor, brushless and brushed. In both brushless and brushed motors, magnets drive the spinning (rotary) motion of the motor shaft.

  • Brushed Motors These are a more traditional type of motor and are typically used in cost-sensitive applications, where control systems are relatively simple, such as in consumer applications and more basic industrial equipment.
  • Brushless Motors Brushless motors alleviate some of the issues associated with brushed motors such as short life span for high use applications and are mechanically much simpler in design (not having brushes). The advantages of brushless motors are longer life, little maintenance and high efficiency (85-90%). These types of motors are generally used in speed and positional control with applications such as fans, pumps and compressors, where reliability and ruggedness are required.

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Description Price Supply Voltage DC Motor Type Power Rating Output Speed Shaft Diameter Maximum Output Torque Gearhead Type Length Gear Ratio Width Depth Dimensions Current Rating Core Construction
RS Stock No. 238-9721
BrandRS PRO
HK$33.44
Each
units
3 → 7.2 V dc - 19.68 W 19000 rpm 2.3mm 375 gcm - 38mm - - - 27.7 (Dia.) x 38 mm 4.41 A Iron Core
RS Stock No. 111-0830
Mfr. Part No.BCH2MR3023CA6C
HK$10,193.04
Each
units
220 V - 3 kW 3000 rpm 35mm 42.97 Nm - 281mm - 180mm 245mm 281 x 180 x 245 mm 53.9 A rms -
RS Stock No. 781-3058
Mfr. Part No.900-00005
HK$145.33
Each
units
4 → 6 V Servo 140 mA - - 27 Ncm - 406mm - 55.8mm 19mm 406 x 55.8 x 19 mm 140 mA -
RS Stock No. 351-4726
HK$3,546.51
Each
units
24 V dc Servo 60 W 3200 rpm 6mm 1.05 Nm - 142mm - 52.5mm - - - -
RS Stock No. 892-9195
Mfr. Part No.16ECH36 8B 245.01
BrandPortescap
HK$2,486.83
Each
units
24 V Brushless 23 W 12420 rpm 3mm 6.6 mNm - 46mm - 16mm - 16 (Dia.) x 46 mm 400 mA Permanent Magnet
RS Stock No. 535-0401
BrandRS PRO
HK$392.90
Each
units
2.8 V Hybrid Stepper - - 5mm - - - - - 47mm - 1.68 A -
RS Stock No. 873-4818
Mfr. Part No.2232S012BX4
BrandFaulhaber
HK$1,508.71
Each
units
12 V Brushless 8.8 W 4450 rpm 3mm 14.7 mNm - 46mm - - - 22 (Dia.) x 46 mm 1 A -
RS Stock No. 495-063
Mfr. Part No.251601
BrandMaxon
HK$1,241.56
Each
units
24 V dc Brushless 50 W 6700 rpm 4mm 84.3 mNm - 21.3mm - - - 42.8 (Dia.) x 21.3 mm 2.36 A -
RS Stock No. 779-3740
Mfr. Part No.FMJ7301CH
HK$150.12
Each
units
12 V Bipolar, Unipolar Stepper - - 3mm - - - - - 19mm - 32 mA -
RS Stock No. 873-4811
Mfr. Part No.2250S024BX4
BrandFaulhaber
HK$1,717.03
Each
units
24 V Brushless 17.3 W 4870 rpm 3mm 26.2 mNm - 64mm - - - 22 (Dia.) x 64 mm 850 mA -
RS Stock No. 535-0445
BrandRS PRO
HK$764.31
Each
units
3.2 V Hybrid, Permanent Magnet Stepper - - 6.35mm - - - - - 76mm - 2.8 A -
RS Stock No. 829-3538
Mfr. Part No.SS2421-5041
HK$341.16
Each
units
24 V Hybrid Stepper - - 5mm - - - - - 11.6mm - 1 A -
RS Stock No. 238-9737
BrandRS PRO
HK$39.38
Each
units
6 → 15 V dc - 7.98 W 9869 rpm 2.31mm 78.4 gcm - 38mm - - - 27.7 (Dia.) x 38 mm 990 mA Iron Core
RS Stock No. 248-3687
Mfr. Part No.RS360
HK$98.96
Each
units
24 V dc Brushed - 5600 rpm - 2.3 Ncm - - - - - - - Iron Core
RS Stock No. 873-4748
Mfr. Part No.2232S012BX4 SC
BrandFaulhaber
HK$2,644.58
Each
units
12 V Brushless 8.8 W 14500 rpm 3mm 16 mNm - 61.8mm - - - 22 (Dia.) x 61.8 mm 1 A, 1.4 A -
RS Stock No. 248-3716
Mfr. Part No.RS380
HK$104.33
Each
units
24 V dc Brushed - 6500 rpm 2.3mm 3.5 Ncm - 37.8mm - - - 27.7 (Dia.) x 37.8 mm - Iron Core
RS Stock No. 881-4497
Mfr. Part No.DMN29B36G100A
BrandNidec
HK$365.16
Each
units
12 V dc Brushed Geared 3 W 40 rpm 6mm 39 Ncm - 87.8mm 100:1 37mm - 37 (Dia.) x 87.8 mm 420 mA -
RS Stock No. 774-0525
Mfr. Part No.351007
BrandMaxon
HK$888.63
Each
units
12 V Brushless 5 W 5210 rpm 2mm 7.5 mNm - 21.4mm - - - 20 (Dia.) x 21.4 mm 648 mA -
RS Stock No. 413-0622
BrandRS PRO
HK$114.97
Each
units
12 V, 12 → 24 V dc Brushed Geared 1.31 W 66 rpm 4mm 1000 gcm Spur 51mm - 27mm - - 190 mA Iron Core
RS Stock No. 383-1267
Mfr. Part No.53154
HK$130.53
Each
units
12 V Bipolar, Unipolar Stepper - - 1.5mm - - - - - - - - -
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