| Item | Specifications |
| Step Angle | 1.8° |
| Temperature Rise | 80℃max |
| Ambient Temperature | -20℃~+50℃ |
| Insulation Resistance | 100 MΩ Min. ,500VDC |
| Dielectric Strength | 500VAC for 1minute |
| Shaft Radial Play | 0.02Max. (450g-load) |
| Shaft Axial Play | 0.08Max. (450g-load) |
| Max. radial force | 28N (20mm from the flange) |
| Max. axial force | 10N |
| Model No. | Step Angle | Motor Length | Rate Voltage | Current /Phase | Resistance /Phase | Inductance /Phase | Holding Torque | # of Leads | Detent Torque | Rotor Inertia | Mass |
| ( °) | (L)mm | V | A | Ω | mH | kg.cm | No. | g.cm | g.cm | Kg | |
| JK42HS40-1004YAL | 1.8 | 40 | 3.90 | 1.0 | 3.9 | 8.9 | 4.8 | 4 | 150 | 54 | 0.40 |