M21NSXA-JDN-NS-02 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific M21NSXA-JDN-NS-02 is a stepper motor from the POWERMAX II M Motors series featuring a NEMA 23 frame size and an overall length of 52.3 mm. It provides a step angle of 1.8 degrees with 200 steps per revolution and uses a low inertia rotor with smooth, double 6.35 mm shafts. The motor has Class B insulation rated up to 340 Vdc and operates in temperatures from -20°C to +40°C.
Internal Product Review
The M21NSXA-JDN-NS-02 is a POWERMAX II M stepper motor featuring enhanced construction and a NEMA 23 frame size. A low-inertia rotor and 1.8-degree step angle give motion systems responsive indexing and clean incremental control. The no-feedback configuration keeps the package straightforward, while 200 steps per revolution remains a strong specification for repeatable positioning.
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Product Description:
The M21NSXA-JDN-NS-02 is a stepper motor designed for incremental motion control in automated machinery. Pacific Scientific positions this model within the POWERMAX II M Motors series, a NEMA-frame product line intended for direct coupling to lead screws, indexing tables, and small conveyor drives. By energizing its winding set in controlled sequences from a microstep or full-step drive, the motor converts digital command pulses into precise shaft rotation. This operation enables repeatable positioning in packaging machinery, test equipment, and semiconductor-handling systems.
The square frame conforms to NEMA 23 standards, giving the motor a 57.10 mm body width and a 66.670 mm bolt circle that aligns with common motion platforms. Each full step advances the rotor by 1.8 degrees, resulting in 200 steps per revolution for straightforward open-loop positioning. The overall stack depth is 52.3 mm, keeping the axial footprint compact for applications with restricted installation space. Dynamic response is further improved by the low-inertia rotor, which requires less energy to accelerate the load and helps limit settling time after direction reversals. These characteristics support rapid start-stop cycles without adding unnecessary size to the motion axis.
Axial power transfer occurs through a double-ended shaft, and the primary journal has a diameter of 6.35 mm. Its smooth finish accommodates press-fit pulleys or couplings where a keyed connection is not required. Continuous service is supported within an ambient temperature range of -20°C to +40°C, allowing cabinet or open-air installation in factory environments. The internal windings use Class B insulation rated for 130°C, providing thermal headroom between the permissible coil temperature and the surrounding air. A dielectric withstand rating of 340 VDC helps the insulation tolerate elevated electrical stress from the connected drive. Heat dissipates through the motor housing, so the unit does not require an external cooling fan under its permitted operating conditions.
