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The NEMA 17 (42mm) fixed through shaft type hybrid stepper motor is a captive linear actuator featuring an integrated anti-rotation spline mechanism that ensures pure linear extension and retraction without screw rotation. The nut is built into the motor rotor, and the spline prevents the screw from turning — converting rotary motion into linear push/pull action. This design requires no external guide rails or anti-rotation devices, making it exceptionally compact and easy to integrate. With optimal stroke lengths under 50mm, this actuator is ideal for 3D printer Z-axis positioning, laser focus adjustment, pick-and-place nozzles, valve actuation, and precision clamping mechanisms where space is limited and reliable short-stroke linear motion is required.
Structure Type: Fixed Through Shaft (Captive) — Screw extends/retracts linearly, does not rotate. Built-in spline prevents rotation. Best for short-stroke, space-constrained applications.
| 电机规格 Motor size | 相电压(V) Voltage/Phase | 相电流(A) Current/Phase | 相电阻(Ω) Resistance/Phase | 相电感(mH) Inductance/Phase | 电机线数 Number of lead wires | 转子惯量(g·cm²) Rotor inertia | 电机重量(g) Motor weight | 电机长度L(mm) Motor length |
| 42 | 2.6 | 1.5 | 1.8 | 2.6 | 4 | 35 | 250 | 34 |
| 42 | 3.3 | 1.5 | 2.2 | 4.6 | 4 | 55 | 290 | 40 |
| 42 | 2 | 2.5 | 0.8 | 1.8 | 4 | 70 | 385 | 48 |
| 42 | 2.5 | 2.5 | 1 | 2.8 | 4 | 105 | 450 | 60 |
