0.7 N·m NEMA 17 closed loop Stepper Motor for 3D Printers and Medical Equipment

NEMA 17 closed loop Stepper Motor for Compact Equipment

The 42J1860EC-1000-LS is a 2-phase closed loop stepper in a NEMA 17 frame, with a 60 mm body, 1.7 A phase current, and 0.7 N·m holding torque on a 5 mm shaft. It sits in the torque range typical for 3D printers, medical devices, and inspection stages, with the added reliability of closed loop position feedback.

Why a Small Stepper Benefits From closed loop Control

Light mechanisms rarely stall in a controlled lab test, but in production they see variable friction, binding, and acceleration spikes. The integrated 1,000 P/R encoder tells the drive the actual rotor position, so any missed step is detected and corrected instead of silently shifting the mechanism’s zero point. That matters in medical and inspection equipment where a positional error means re-running the process.

Operating Limits

Holding torque is specified at standstill with rated current. Running torque falls with speed as the 1.7 A winding builds current between steps. Because the closed loop lowers standing current when the axis is idle, the motor stays cooler in enclosed instruments and printers.

Specifications

• Frame size: NEMA 17
• Body length: 60 mm
• Phase count: 2-phase
• Phase current: 1.7 A
• Holding torque: 0.7 N·m
• Shaft diameter: 5 mm
• Feedback: integrated 1,000 P/R encoder

Applications

The motor is used in packaging machinery, factory automation, precision robotic mechanisms, 3D printers, inspection equipment, pump systems, and medical equipment. Its compact frame and 0.7 N·m rating fit printer axes, small rotary stages, and peristaltic and dosing pumps that need repeatable motion.

Selection Considerations

For integrators, the value of this motor lies in the closed loop: even a small stepper benefits from knowing its true rotor position, and the integrated encoder removes the risk of silent step loss on printer axes and medical mechanisms that must return to the same zero point every cycle. Drive the motor with a closed loop stepper driver that reads the 1,000 P/R encoder and provides the 1.7 A phase current, verify the torque at your operating speed from the speed-torque curve, and keep the moved mass light to preserve clean step response in compact equipment.