57J1854EC-1000-LS 1 Nm Closed Loop Stepper Motor - NEMA 23

The 57J1854EC-1000-LS is a 1 Nm Closed Loop Stepper Motor in a compact NEMA 23 frame, rated 4.0 A per phase with 1.0 N·m holding torque from a 56 mm body. Its short stack and 8 mm shaft suit mechanisms where space is tight but the reliability of closed loop control is still required.

Encoder Feedback on a Small Frame

Even at 1.0 N·m, the motor carries an integrated 1,000 P/R encoder. The drive verifies rotor position against the commanded position on every step and corrects any discrepancy. For battery equipment and high-cycle handling systems, this eliminates the undetected missed-step failures that open-loop steppers are prone to under variable load.

Performance Envelope

Holding torque is the standstill rating. At running speed, available torque falls with the winding’s ability to build current, so load checks should use the speed-torque curve for the actual cycle. The closed loop reduces standing current during idle phases, which limits heating in densely packed machines.

Key Specifications

• Frame size: NEMA 23
• Body length: 56 mm
• Phase count: 2-phase
• Phase current: 4.0 A
• Holding torque: 1.0 N·m
• Shaft diameter: 8 mm
• Feedback: integrated 1,000 P/R encoder

Applications

Applications include packaging machinery, factory automation, precision robotic mechanisms, textile and printing machinery, food processing, automated handling mechanisms, and precision positioning mechanisms for battery equipment. The small frame and closed loop feedback make it a practical choice for multi-axis compact stations.

Selection Considerations

Confirm the drive reads the 1,000 P/R encoder and delivers the 4.0 A phase current. Because the frame is short, keep the load light and verify torque at the operating speed. For compact stations where several axes share a limited envelope, the 56 mm body allows denser packaging than longer NEMA 23 units. The closed loop drive also reduces the standing current at idle, which is a practical advantage in cabinets that hold many axes in a small volume.