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Abrasive Dustproof Stepper Motors
23 Family Size - U Series
Individual Motor Specifications
| Model Number | AD-U21 | AD-U22 | AD-U23 |
| Environment | AD | AD | AD |
| Motor | U21 | U22 | U23 |
| Drawing Number | M2400082 | M2400082 | M2400082 |
| Pricing | AD-U21 | AD-U22 | AD-U23 |
| NEMA Frame Size | 23 | 23 | 23 |
| Number of Magnetic Stacks | 1 | 2 | 3 |
| Step Angle | 1.8 | 1.8 | 1.8 |
| Accuracy Grade (%) | 3 | 3 | 3 |
| Detent Torque (oz-in) | 6 | 15 | 21 |
| Static Torque At Thermal Current {unipolar} (oz-in) | 45 | 80 | 120 |
| Static Torque At Thermal Current {parallel} (oz-in) | 50 | 85 | 110 |
| Static Torque At Thermal Current {series} (oz-in) | 60 | 110 | 130 |
| Thermal Current {unipolar} (A) | 1.4 | 1.6 | 2.0 |
| Thermal Current {parallel} (A) | 1.8 | 1.8 | 2.3 |
| Thermal Current {series} (A) | 1.4 | 1.4 | 1.8 |
| Single Coil Inductance (mH) | 3.5 | 3.5 | 3.5 |
| Single Coil Resistance (ohm) | 1.4 | 1.4 | 1.4 |
| Series Inductance (mH) | 14 | 14 | 14 |
| Series Resistance (ohm) | 3.2 | 3.2 | 3.2 |
| Bearing Type | C/F | C/F | C/F |
| Bearing Thrust Load (lbs) | 25 | 25 | 25 |
| Bearing Radial Load (lbs) | 50 | 50 | 50 |
| Bearing End Play (10**-3 in) | C/F | C/F | C/F |
| Bearing Radial Play (10**-3 in) | 8 | 8 | 8 |
| Rotor Inertia (oz-in2) | 0.48 | 1.28 | 1.75 |
| Body Diameter (in) | 2.25 | 2.25 | 2.25 |
| Body Length (in) | 2.4 | 3.5 | 4.4 |
| Weight (lbs) | C/F | C/F | C/F |
*C/F – Contact Factory
Options:
- Gearboxes
- Feedback Devices
- Temperature Sensors
- Brakes
Modifications:
- Keyways
- Custom Shafts
Speed/Torque (oz-in) Charts
Frequently Asked Questions (FAQ)
About Dustproof Motors
Part Number Configurator
Select a Model with all Available Options
Government Projects & Defense Applications
Empire Magnetics has been awarded and completed US Navy contracts in excess of $100,000 as a prime contractor. The Cage code number assigned was OYMU1, CEC code 19665900H. As a subcontractor to RSI/Comsat, SAIC, Lockheed Martin, Westinghouse, General Electric and other prime contractors for the US Government, contracts in excess of $200,000 have been awarded and completed.
Nationwide & International Distributors for Specialty Motors & Complete Motor System Solutions
Empire Magnetics products are distributed by a nationwide and international network of motion control sales professionals. Your local distributor carries the drives and controls, and the accessories needed to build a complete motion control system.