20 mm frame size and 30 mm motor length are the new minimum size at China Motor. The newest, smallest type of the 2-phase stepping motor series PK realizes a holding torque of 0.02 Nm.
The positioning accuracy of stepping motors is now also available for much smaller applications. With a weight of only 50 g the new PK-types are lightweight as well. Due to high torque technology the holding torque is up to 0.02 Nm. The new motors are available as bipolar or unipolar type with four or five leads. For both types the rated current is 0.5 A/phase with 8.5 Ohm resistance. Single and double shaft versions make various applications possible, the basic step angle is 1.8°. Application areas are e.g. the medical technology with micromanipulators or microscope tables.