42J1848EC-1000-LS 0.5 Nm Closed Loop Stepper Motor - NEMA 17

The 42J1848EC-1000-LS is a 0.5 Nm Closed Loop Stepper Motor in a NEMA 17 frame, with a 48 mm body, 1.5 A phase current, and a 5 mm shaft. It is the lower-torque compact option in this series, intended for precise, low-inertia axes in laboratory and optical instruments.

Feedback for Precision Instruments

An integrated 1,000 P/R encoder gives the drive real rotor position, so commanded and actual positions are compared continuously. If the axis slips, the drive corrects it immediately. In semiconductor and optical equipment, where components are aligned to tight tolerances, this feedback prevents the accumulation of step error over repeated motions.

Thermal and Load Notes

Holding torque is rated at standstill. At speed, available torque declines with the winding’s current rise capability. The 1.5 A rating and short stack keep heat low, and closed loop current reduction during dwell supports long-duration instrument operation.

Key Specifications

• Frame size: NEMA 17
• Body length: 48 mm
• Phase count: 2-phase
• Phase current: 1.5 A
• Holding torque: 0.5 N·m
• Shaft diameter: 5 mm
• Feedback: integrated 1,000 P/R encoder

Applications

The motor serves semiconductor equipment, medical equipment, laboratory equipment, optical equipment, 3D printers, inspection equipment, pump systems, and factory automation. Its small frame and 0.5 N·m rating suit focusing stages, sample positioning, and compact XY tables that prioritize smoothness and repeatability over raw torque.

Selection Considerations

Pair it with a closed loop drive that reads the 1,000 P/R encoder and supports the 1.5 A phase current. Keep the payload light and confirm the torque at your working speed, since the motor is sized for precision rather than heavy loads. The NEMA 17 pattern and 5 mm shaft integrate cleanly into compact instrument axes. The closed loop is particularly valuable in optical systems where a lost step can shift the calibration, so verify the drive tuning during commissioning and confirm the axis can recover from a simulated stall before putting the instrument into service.