22S78

22S78 Brush DC Coreless Motor

22S78

The 22S78 brush DC design combines a high-grade magnet with precious metal commutation in a very dense package size. This coreless DC motor can deliver a torque greater than 8 mNm continuously, reaching up to 70% efficiency while maintaining a long life time.

Product Highlights

  • Ironless construction
  • Neodymium magnet for high performance
  • High power density package
  • Precious metal commutation
  • Long brush life
  • Compact design
  • Winding possibilities
  • REE windings to reduce electro erosion

Customization Available

  • Cable or terminal outputs
  • Coil modifications - resistance and inductance
  • Custom shafts - flats, knurling, diameter, length
  • Fixation holes
  • Sleeve or ball bearings

Part Number 22S78 208E.1 22S78 210E.1
Motor Diameter (in) 0.866 0.866
Motor Diameter (mm) 22 22
Shaft Play - Axial (in) 0.0059 0.0059
Shaft Play - Axial (mm) 0.15 0.15
Shaft Play - Radial (in) 0.0012 0.0012
Shaft Play - Radial (mm) <0.03 <0.03
Back EMF Constant (V/1000 rpm) 2.8 2.3
Continuous Current, Max (A) 0.29 0.41
Continuous Torque, Max (mNm) 7.7 8.9
Continuous Torque, Max (oz-in) 1.09 1.26
Mechanical Time Constant (ms) 7.8 7
Motor Regulation (10³/Nms) 49 37
No-Load Current, Typical (mA) 3.3 4.5
No-Load Speed (rpm) 8550 7780
Nominal Voltage (V) 24 18
Rotor Inertia (gcm²) 1.6 1.9
Rotor Inertia (oz-in-sec² 10ˉ⁶) 22.65 26.897
Torque Constant (mNm/A) 26.7 22
Torque Constant (oz-in/A) 3.78 3.12
Weight (g) 49 49
Weight (oz) 1.73 1.73
Ambient Operating Temperature, Max: Rotor (°C) 100 100
Ambient Operating Temperature, Max: Rotor (°F) 212 212
Ambient Operating Temperature Range: Motor (°C) -30 to 85 -30 to 85
Ambient Operating Temperature Range: Motor (°F) -22 to 185 -22 to 185
Continuous Speed, Max (rpm) 10000 10000
Efficiency 87% 87%
Friction Torque (mNm) 0.09 0.09
Friction Torque (oz-in) 0.013 0.013
Output Power (W) 4.6 5.5
Rotor Inductance (mH) 0.92 0.5
Shaft Load, Max - Axial (5 mm. from bearing) (N) 1.5 1.5
Shaft Load, Max - Axial (5 mm. from bearing) (oz) 5.4 5.4
Shaft Load, Max - Radial (5 mm. from bearing) (N) 100 100
Shaft Load, Max - Radial (5 mm. from bearing) (oz) 359.6 359.6
Stall Torque at Nominal Voltage (mNm) 18.3 22
Stall Torque at Nominal Voltage (oz-in) 2.59 3.12
Terminal Resistance (Ohm) 35 18
Thermal Resistance (rotor/body) (°C/W) 5 / 30 5 / 30
Thermal Time Constant (rotor/stator) (s) 5 / 480 5 / 480
Document Document Type Language File Type
22S78 Specification Page Specification Page
22S78 drawing 2D Drawing
22S78 3D drawing 3D Drawing
Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) Brochure