• 3 phase, NEMA34 frame size
• 156 mm long
• 2.8 A phase current
• 7.8 N.m holding torque
• 14 mm shaft size
• Built with high quality materials.High precision, low motor heating, and low vibration。
The 86J12156-328 is a three-phase open-loop stepper motor in a NEMA34 frame, producing 7.8 N.m of holding torque at 2.8 A per phase. This is a widely used size for machinery axes that need reliable positioning without the cost and complexity of a full servo system.
Three-phase excitation lowers torque ripple during each step, so the axis runs with reduced vibration. For packaging and textile equipment, this translates directly into steadier handling and fewer disturbances to the workpiece or web being processed. The winding is also wound to reduce heating, keeping position stable on long runs.
The 14 mm shaft connects to standard couplings. Open-loop control means the motor follows pulse and direction commands with no feedback tuning. With only 2.8 A needed per phase, it pairs with a modestly sized 3-phase drive.
Its torque and NEMA34 footprint suit Compact CNC Equipment, Packaging Machinery, Factory Automation, Compact Robotic Mechanisms, Textile Machinery, Printing Machinery, and Food Processing.
Choose a 3-phase drive rated for at least 2.8 A output. The open-loop architecture keeps wiring simple, and smooth torque output makes this a good fit for continuous-index applications in compact automation.
| Model | 86J12156-328 |
| Phase | 3 |
| Step Angle（deg） | 1.2 |
| Holding Torque(N·m) | 7.8 |
| Rated Current（A） | 2.8 |
| Phase Resistance(ohm) | 5 |
| Phase Inductance（mH） | 32 |
| Detent Torque（mN·m） | 3000 |
| Rotor inertia（g·cm²） | 4000 |
| Insulation Class | B |
| Number of Leads | 6 |
| Weight（kg） | 5 |
| Length（mm） | 156 |
| Matched Drive | 3DM3422 |
| Frame Size（NEMA） | 34 |
| Shaft Diameter（mm） | 14 |
| Frame Size(mm) | 86 |
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