Can a stepper motor be opened?
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No, because when the stepper motor is opened the rotor makes contact with the stator and the magnetization is reduced which means that the torque of the motor decreases appreciably. This primarily affects magnets with lower coercive field strength such as Alnico magnets that are easily shifted from their optimum operating point in their nonlinear magnetization curve and thus undergo a weaker magnetization characteristic whereas more high-quality N-magnets splinter very easily without appropriate tools and are easily cracked by only slightly incorrect handling and can therefore sustain permanent magnetic damage.
