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The NEMA 11 (28mm) fixed through shaft type hybrid stepper motor is a captive linear actuator featuring an integrated anti-rotation spline mechanism that allows the lead screw to extend and retract linearly without rotating. This design eliminates the need for external guide rails or anti-rotation devices, making it ideal for compact equipment layouts. The nut is built into the motor rotor and rotates with it, while the spline prevents screw rotation — converting rotational motion into pure linear extension. With recommended stroke lengths under 40mm, this actuator is perfect for 3D printers (Z-axis), CNC tools, medical devices, valve control, and laboratory automation where space is at a premium and short-stroke precision 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 |
| 28 | 2.1 | 1 | 2.1 | 1.5 | 4 | 9 | 120 | 34 |
| 28 | 3.7 | 1 | 3.7 | 2.3 | 4 | 13 | 180 | 45 |
