This is the most popular nema 8 stepper motor with step angle 1.8deg and size 20x20x38mm. It has 4 wires, each phase draws 0.6A rated current with holding torque 0.04Nm (5.7oz.in). Please note this motor has a 15.4mm bolt spacing & 16.0mm pilot circle.
Electrical Specification
Part Number: 20HS38-0604S
Step Angle: 1.8deg
Bipolar/Unipolar: Bipolar
Holding Torque: 0.04Nm(5.7oz.in)
Rated Current/phase: 0.6A
Phase Resistance: 10ohms
Inductance: 5.5mH
Drving Voltage: 12-24VDC
Physical Specification
Frame Size: 20x20mm
Body Length: 38mm
Shaft Diameter: Φ4mm
Shaft Length: 10mm
D-cut Length: 7mm
Number of Leads: 4
Lead Length: 300mm
Weight: 80g
Motor Connection
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| Electrical Specification | |
| Bipolar/Unipolar | Bipolar |
| Step Angle(°) | 1.8 |
| Holding Torque(Nm) | 0.04 |
| Holding Torque(oz.in) | 5.7 |
| Rated Current(A) | 0.6 |
| Phase Resistance(ohm) | 10 |
| Phase Inductance(mH) | 5.5 |
| Physical Specification | |
| Frame Size(mm) | 20x20 |
| Body Length(mm) | 38 |
| Shaft Type | D-cut |
| Single Shaft/Dual Shaft | Single Shaft |
| Shaft Diameter(mm) | 4 |
| Shaft Length(mm) | 10 |
| No. of Leads | 4 |
| Lead Length(mm) | 300 |
| Weight(KG) | 0.08 |
