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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
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| 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 |
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| 22S78 drawing | 2D Drawing |
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| 22S78 3D drawing | 3D Drawing |
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| Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) | Brochure |
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