Product Description:

The E21NCHT-LDN-PK-00 is a hybrid stepper motor from Kollmorgen’s E Hybrid Stepper Motors series. As a two-phase motor, it translates digital pulse commands from an indexer or drive into incremental shaft rotation. This operating method supports positioning tasks such as small gantry axes, laboratory dispensers, and light conveyor indexing in industrial automation.

The motor occupies a NEMA 23 frame, so its 57 mm square face aligns with common mounting brackets and uses a standardized NEMA fastener pattern. A holding torque of 123 oz-in (0.87 Nm) secures loads when the coils are energized, while a detent torque of 4.8 oz-in limits drift when power is removed. The rated phase current is 2.8 A DC, and the coil has a resistance of 0.72 ohms and an inductance of 2.2 mH. These electrical values help determine the required drive voltage and current rise time for low-speed torque production. The motor advances by 1.8 degrees per full step, providing 200 discrete positions per revolution with an accuracy of ±1.5%. A laminated single-stack rotor with an inertia of 0.0015 oz-in-s² balances rapid acceleration with load stability. SIGMAX construction concentrates magnetic flux to increase low-speed torque, complementing a winding optimized for maximum torque at low speeds. The motor has a smooth, double-ended shaft that permits encoder coupling on one side and load attachment on the other.

Electrical leads exit through a System MS connector, and the four-lead parallel configuration supports bipolar or unipolar drive modes. The assembly weighs 1.2 lb, reducing the load placed on compact machine frames during installation and operation. The motor operates from -20 °C to +40 °C, while a thermal resistance of 6.0 °C/W provides a basis for calculating the temperature rise caused by electrical losses. It uses Class B insulation rated for 130 °C with an insulation resistance of 100 MΩ. The insulation withstands up to 340 VDC to protect the windings against dielectric breakdown.