M21NSXD-JDN-NS-02 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific M21NSXD-JDN-NS-02 is a stepper motor from the POWERMAX II M Motors series with a NEMA 23 frame size and enhanced construction. It features a detent torque of 9.4 oz-in and a step angle of 1.8 degrees, offering 200 steps per revolution. This motor is built with a double, smooth shaft and is rated for Class B insulation up to 130°C.
Internal Product Review
The M21NSXD-JDN-NS-02 is a Pacific Scientific POWERMAX II M stepper motor with a NEMA 23 frame and enhanced construction. A 1.8-degree step angle and ±1.5% step accuracy support precise indexing in demanding motion applications. Low-inertia rotor design makes the motor an excellent choice for responsive positioning performance.
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Product Description:
The M21NSXD-JDN-NS-02 is a two-phase stepper motor supplied by Pacific Scientific within the POWERMAX II M Motors series. Designed to deliver incremental rotary motion without position feedback devices, the unit indexes mechanical loads in pick-and-place stations, small conveyors, and laboratory automation. Its NEMA-conforming frame supports installation with common drive modules, mounting hardware, and motion controllers used in industrial systems.
Each full step advances the shaft by 1.8 degrees, so one mechanical revolution is subdivided into 200 steps per revolution for straightforward pulse counting. The motor body matches a NEMA 23 flange, giving it a 2.25-inch width across the flats and permitting direct installation with standard gearheads or brackets. When the motor is de-energized, it provides a detent torque of 9.4 oz-in. The low-inertia rotor has a moment of inertia of 0.0013 oz-in-s², supporting rapid acceleration with modest drive current. Internal windings follow a D pattern and are arranged in two distinct phase groups. The controller must therefore supply current to two phases with proper lead sequencing to generate continuous torque.
Thermal and dielectric limits are supported by a Class B insulation system rated for 130 °C, which withstands repetitive operating cycles without insulation breakdown. The coil assembly has an insulation resistance of 100 megohms and an isolation capability of 340 Vdc, providing suitable electrical separation for many microstepping drives. The permitted operating temperature ranges from -20 °C to +40 °C, allowing use in unheated warehouses or enclosed control cabinets. Its single-stack construction minimizes axial length and conserves installation space in compact machinery. The double smooth shaft accommodates an external encoder or an additional coupling when a secondary mechanical connection is required. Electrical leads terminate at a receptacle connector, allowing the motor to connect to compatible cabling without permanently attached flying leads.
