86J18156EC-1000-LS 12 Nm Closed Loop Stepper Motor - NEMA 34

The 86J18156EC-1000-LS is a 12 Nm Closed Loop Stepper Motor built in a NEMA 34 frame, with a 156 mm body, 6.0 A per phase, and 12 N·m holding torque on a 14 mm shaft. It sits at the upper end of the NEMA 34 torque range, overlapping territory where machine builders previously had to step up to a servo axis.

How the Integrated 1,000 P/R Encoder Closes the Loop

Open-loop steppers command motion and assume the rotor follows. When the load approaches the motor’s pull-out torque during acceleration, the rotor can lose steps silently. This motor closes that loop: the drive compares commanded position with the position reported by the integrated 1,000 P/R encoder and corrects the error in real time. The practical effect is that the axis holds position and recovers from transient overload instead of drifting.

Torque Behavior in Use

The 12 N·m figure is holding torque at standstill with rated current. Available torque declines with speed as winding inductance slows current build-up. closed loop control mitigates this by allowing the drive to apply higher current during acceleration and reduce it at standstill, which also limits temperature rise on duty cycles with long idle phases.

Key Specifications

• Frame size: NEMA 34
• Body length: 156 mm
• Phase count: 2-phase
• Phase current: 6.0 A
• Holding torque: 12 N·m
• Shaft diameter: 14 mm
• Feedback: integrated 1,000 P/R encoder

Applications

As an industrial automation supplier, we offer this motor for CNC machine tools, packaging machinery, factory automation, precision robotic mechanisms, textile and printing machinery, food processing, and automated handling mechanisms. Its 12 N·m rating suits direct-driven indexing and belt or gear transmissions that would overload a NEMA 23 unit, while the closed loop feedback keeps repeatability predictable at moderate speeds.

Selection Considerations

Match the motor with a compatible closed loop stepper drive that reads the 1,000 P/R encoder and supports the 6.0 A phase current. Confirm the available torque at your cycle speed, and allow for the 156 mm body length when laying out the axis. For machine builders who need NEMA 34-scale torque with the reliability of feedback, this is a practical alternative to a full servo system.