28DT12 Brush DC Coreless Motor
28DT12
The 28DT12 brush DC motor is a cost efficient solution for applications requiring acceleration (start/stop) with a long brush life time.
Product Highlights
- Ironless construction
- Alnico magnet for high performance
- Graphite/copper commutation
- Long brush life
- Winding possibilities
- Low self heating
Customization Available
- Cable or terminal outputs
- Coil modifications - resistance and inductance
- Custom shafts - flats, knurling, diameter, length
- Fixation holes
- Sleeve or ball bearings
Applications
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| Part Number | 28DT12-219E.1 | 28DT12-219P.1 | 28DT12-222E.1 | 28DT12-222P.1 |
|---|---|---|---|---|
| Motor Diameter (in) | 1.102 | 1.102 | 1.102 | 1.102 |
| Motor Diameter (mm) | 28 | 28 | 28 | 28 |
| Shaft Play - Axial (in) | 0.0059 | 0.0059 | 0.0059 | 0.0059 |
| Shaft Play - Axial (mm) | 0.15 | 0.15 | 0.15 | 0.15 |
| Shaft Play - Radial (in) | 0.0001 | 0.0001 | 0.0001 | 0.0001 |
| Shaft Play - Radial (mm) | <0.025 | <0.025 | <0.025 | <0.025 |
| Back EMF Constant (V/1000 rpm) | 3.95 | 2.04 | 3.4 | 1.7 |
| Continuous Current, Max (A) | 1.1 | 2 | 1.4 | 2.5 |
| Continuous Torque, Max (mNm) | 37 | 36 | 41 | 37 |
| Continuous Torque, Max (oz-in) | 5.24 | 5.1 | 5.81 | 5.24 |
| Mechanical Time Constant (ms) | 12.6 | 14.4 | 12 | 14 |
| Motor Regulation (10³/Nms) | 7 | 7.6 | 5.9 | 7.2 |
| No-Load Current, Typical (mA) | 90 | 180 | 110 | 210 |
| No-Load Speed (rpm) | 6870 | 7100 | 6851 | 6840 |
| Nominal Voltage (V) | 28 | 15 | 24 | 12 |
| Rotor Inertia (gcm²) | 18 | 18 | 20 | 20 |
| Rotor Inertia (oz-in-sec² 10ˉ⁶) | 254.812 | 254.812 | 283.124 | 283.124 |
| Torque Constant (mNm/A) | 37.7 | 19.5 | 32.5 | 16.2 |
| Torque Constant (oz-in/A) | 5.34 | 2.76 | 4.6 | 2.29 |
| Weight (g) | 200 | 200 | 200 | 200 |
| Weight (oz) | 7.05 | 7.05 | 7.05 | 7.05 |
| Ambient Operating Temperature, Max: Rotor (°C) | 100 | 100 | 100 | 100 |
| Ambient Operating Temperature, Max: Rotor (°F) | 212 | 212 | 212 | 212 |
| Ambient Operating Temperature Range: Motor (°C) | -30 to 85 | -30 to 85 | -30 to 85 | -30 to 85 |
| Ambient Operating Temperature Range: Motor (°F) | -22 to 185 | -22 to 185 | -22 to 185 | -22 to 185 |
| Continuous Speed, Max (rpm) | 9000 | 9000 | 9000 | 9000 |
| Efficiency (%) | 68 | 66 | 69 | 67 |
| Friction Torque (mNm) | 3.4 | 3.4 | 3.4 | 3.4 |
| Friction Torque (oz-in) | 0.481 | 0.481 | 0.481 | 0.481 |
| Output Power (W) | 24 | 24 | 27 | 24 |
| Rotor Inductance (mH) | 1.1 | 0.3 | 0.75 | 0.2 |
| Shaft Load, Max - Axial (5 mm. from bearing) (N) | 8 | 8 | 8 | 8 |
| Shaft Load, Max - Axial (5 mm. from bearing) (oz) | 28.8 | 28.8 | 28.8 | 28.8 |
| Shaft Load, Max - Radial (5 mm. from bearing) (N) | 500 | 500 | 500 | 500 |
| Shaft Load, Max - Radial (5 mm. from bearing) (oz) | 1798.5 | 1798.5 | 1798.5 | 1798.5 |
| Stall Torque at Nominal Voltage (mNm) | 107 | 101 | 126 | 102 |
| Stall Torque at Nominal Voltage (oz-in) | 15.15 | 14.3 | 17.84 | 14.44 |
| Terminal Resistance (Ohm) | 9.9 | 2.9 | 6.2 | 1.9 |
| Thermal Resistance (rotor/body) (°C/W) | 3.5 / 8 | 3.5 / 8 | 3.5 / 8 | 3.5 / 8 |
| Thermal Time Constant (rotor/stator) (s) | 18 / 630 | 18 / 630 | 18 / 630 | 18 / 630 |
| Document | Document Type | Language | File Type |
|---|---|---|---|
| 28DT12 Specification Page | Specification Page |
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| 28DT12 drawing | 2D Drawing |
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| 28DT12 3D drawing | 3D Drawing |
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| Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) | Brochure |
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