E33HRHA-LDS-SS-02 Kollmorgen
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The Kollmorgen E33HRHA-LDS-SS-02 is a hybrid stepper motor from the E Hybrid Stepper Motors series with a NEMA 34 frame size and 940 oz-in holding torque. It features SIGMAX construction, rated current per phase of 8.6 Amps, and 200 steps per revolution at a step angle of 1.8 degrees. The motor uses a heavy duty NEMA mounting style and operates in temperatures from -20°C to +40°C.
Internal Product Review
The E33HRHA-LDS-SS-02 is a Kollmorgen hybrid stepper motor in a NEMA 34 frame with 940 oz-in holding torque. A 1.8-degree step angle and ±1.5% step accuracy support smooth, repeatable positioning in indexing and feed applications. Regular leadwire connection and 4-lead parallel wiring make the motor a very capable choice for precision stepper systems.
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Product Description:
The E33HRHA-LDS-SS-02 is a hybrid stepper motor manufactured by Kollmorgen for the E Hybrid Stepper Motors series. Using SIGMAX construction and a three-stack rotor, the motor delivers incremental motion whenever a drive energizes its phase windings, making it suitable for indexing actuators, small gantries, and other industrial automation axes that require repeatable, open-loop positioning. A heavy-duty NEMA mounting face lets the unit bolt directly to standardized gearheads or machine frames, while a regular lead-wire connection simplifies hookup inside control cabinets. This arrangement supports direct integration with compatible stepper drives and common mechanical transmission components.
The motor has a NEMA 34 frame size and provides a holding torque of 940 oz-in, helping the shaft resist movement when static loads are present. Each winding may be driven with 8.6 A per phase through a four-lead parallel setup, supporting strong stall torque and smooth microstepping operation. A nominal step angle of 1.8 degrees provides 200 steps per revolution, with a step accuracy of ±1.5%, permitting predictable linear travel when the motor is paired with a lead screw. The motor has Class B insulation rated for 130 °C and an insulation resistance of at least 100 megohms when measured at 500 V. Its insulation voltage rating is 340 VDC, allowing operation with high-performance bipolar drives. Lead wires exit in a regular orientation, helping keep cable routing within standard electrical enclosures.
Electrical response is influenced by a phase inductance of 2.3 mH and a phase resistance of 0.23 ohms. These values affect the electrical time constant, current rise time, and suitable pulse-width modulation frequency for the connected drive. Thermal management is supported by a thermal resistance of 2.0 °C/W, allowing housing temperature rise to be estimated from motor power losses. Continuous service is supported across an ambient temperature range of -20 °C to +40 °C. Maintaining adequate airflow around the housing helps the motor release heat during extended operation. The three-stack rotor provides the magnetic structure needed for incremental movement while the drive regulates phase current during acceleration, holding, and deceleration.
