E21NCHT-LDN-SS-03 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The E21NCHT-LDN-SS-03 is a stepper motor made by Kollmorgen in the E Hybrid Stepper Motors series. It features a NEMA 23 frame size with a 2.25 inch diameter and uses SIGMAX construction. The motor has a step angle of 1.8 degrees, provides 200 steps per revolution, and operates with a system MS connector and a double smooth shaft.
Internal Product Review
The E21NCHT-LDN-SS-03 is a well-engineered hybrid stepper motor with a NEMA 23 frame and a 1.8 degree step angle. A System MS connector and 4-lead parallel connection support clean installation and straightforward drive integration. The +/-1.5% step accuracy makes the motor a strong choice for precise incremental positioning.
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Product Description:
The E21NCHT-LDN-SS-03 hybrid stepper motor is produced by Kollmorgen as part of the E Hybrid Stepper Motors series. In industrial automation, it converts pulse commands from a microstepping drive into incremental rotation, giving machines deterministic positioning for indexing systems, pick-and-place heads, and small gantry axes. It suits conveyors, actuators, and laboratory instruments that require mid-range torque and precise indexing. The motor’s incremental movement allows compatible control systems to command repeatable changes in shaft position without relying on complex mechanical transmission components.
The motor mounts to equipment through a NEMA 23 face and has a circular housing diameter of 2.25 inches, allowing it to fit common instrument frames without adapters. Motion resolution comes from a 1.8-degree step angle that provides 200 discrete positions per revolution, with an accuracy of ±1.5% for repeatable indexing. The coil set uses a four-lead parallel winding accessed through a System MS connector, allowing low phase inductance and simplified cabling. A single laminated rotor stack works with SIGMAX magnetic shoes to concentrate magnetic flux and increase torque density at low speed. A double, smooth shaft extends from both ends, enabling encoder or gear coupling while keeping backlash minimal. Top-mounted NEMA holes align with standard mounting brackets and provide secure attachment to the machine frame.
The windings use Class B insulation rated for 130 °C, allowing the motor to tolerate thermal rise without varnish breakdown. Coil-to-frame insulation resistance is rated at 100 megohms, while a dielectric strength of 340 VDC protects the windings against overvoltage from chopper drives. Continuous operation is permitted from -20 °C to +40 °C, accommodating use in many unconditioned enclosures. The male MS3122E14-5P motor connector mates with an MS3116F14-5S plug to secure the four phase leads. This connector arrangement provides a locking interface that helps prevent accidental disconnection during machine vibration. The winding is designed to deliver maximum torque at low speed, improving holding performance for direct-drive tables and other positioning mechanisms.
