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The SY42STH47-1684A is a NEMA 17 frame hybrid stepper motor with a single shaft, a 1.8° step angle and two phases rated at 2.8 V. That 1.8° step gives 200 full steps per revolution, the standard for NEMA 17 motors, so it drops into the same mounts and couplings as other 42 mm frame motors. It suits 3D printer builds, CNC conversions and small automation projects where a plain single-shaft motor is enough. Against multi-shaft or higher-current NEMA 17 motors it is the simpler, lower-voltage option; it needs an external driver such as the PoStep25-32 rather than running directly from logic pins.
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The SY42STH47-1684A is a high-torque hybrid stepper motor in the NEMA 17 size. It has a single shaft.
It is a 2-phase motor with a 1.8° step angle. It is rated for 2.8 V and 1.68 A, with a holding torque of 0.46 Nm. The PoStep25-32 is a suitable driver for it.
