6.8 N·m Brake Closed Loop Stepper - NEMA 34 Safety-First Design

What This Motor Delivers

The 86J12126EC-1000-60-SCG is a 6.8 N·m Brake Closed Loop Stepper motor in a NEMA 34 frame, supplied by Lyenwsin for OEMs and automation integrators. It produces 6.8 N·m holding torque from a 126 mm body, runs at 3.0 A phase current, and uses a 1,000 P/R encoder to close the position loop. An integrated holding brake adds fail-safe positioning for axes that must not move when power is off.

closed loop Positioning Explained

Continuous Encoder Feedback

The built-in 1,000 P/R encoder tracks rotor position and reports it to the drive on every revolution. When friction or load changes during a move, the drive corrects the deviation immediately, so the axis does not accumulate positional drift over long production runs. This makes the motor substantially more predictable than an open-loop stepper of the same frame size.

Working Closer to Rated Torque

Because step loss is detected instead of merely avoided, the motor can operate near its rated torque without a large stall margin. Lines see fewer missed-step alarms, and motion stays synchronized even when the mechanical load is not perfectly constant.

Brake and Safety Behavior

The brake engages automatically on power loss, holding the load in place during downtime, emergency stops, and normal machine cycling. Vertical lifts, rotary tables, and magazine changers are the classic beneficiaries. Integrating the brake into the motor removes the need for external brake hardware and simplifies mechanical design.

Key Specifications

• Motor type: 3-phase hybrid stepper, closed loop, with brake
• Frame size: NEMA 34
• Body length: 126 mm
• Phase current: 3.0 A
• Holding torque: 6.8 N·m
• Shaft diameter: 14 mm
• Feedback: integrated 1,000 P/R encoder

Typical Industrial Applications

The motor fits compact industrial automation, packaging machinery, textile equipment, and printing systems where holding torque and fail-safe holding are both required. The 14 mm shaft couples cleanly to timing belts and lead screws, and the NEMA 34 flange matches the standard mount pattern used by most machine builders.

Selection Considerations

Before specifying, review the duty cycle, ambient temperature, and worst-case static load on the axis. The 6.8 N·m figure is motor holding torque; the brake must be validated against the actual load it must hold with power removed. As a distributor, Lyenwsin can supply the matching closed loop drive, cabling, and brake sequence guidance so your engineering team commissions the axis correctly. Request a dimensional drawing and wiring diagram from our technical support team.