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NEOTON MOTOR
86BH181RS125IM_datasheet.pdf

86BH181RS125IM_datasheet.pdf

Product catalog summary

Overview: The 86BH181RS125IM is a high-torque, 86 mm RS485 integrated stepper servo designed for demanding applications such as transfer systems, robot arms, and industrial automation. It features a maximum output torque of 12 N·m and offers battery-free multi-turn feedback, enhancing position recovery and simplifying wiring.

Key Highlights:

Maximum output torque of 12 N·m
RS485 communication interface
Battery-free multi-turn feedback ranging from -100 to +1499 turns
Input voltage range of 18–70 VAC
Integrated drive and encoder architecture

Specifications:

Model Number: 86BH181RS125IM
Frame Size: 86 mm (NEMA 34)
Integrated Body Length: 180.6 mm
Shaft Diameter: 14 mm
Current Setting: 0.2–3.2 A, software adjustable; factory-matched motor at 6.0 A
Encoder Feedback: 4096 lines (16,384 counts)
Phase Resistance: 0.79 Ω ±20%
Phase Inductance: 8.2 mH ±20%
Rotor Inertia: Approx. 5400 g·cm²
Weight: Approx. 5.5 kg
Microstep Setting: Configurable by host, default 4000
Address Setting: Default 1, adjustable by host software
Protection Features: Over-voltage, under-voltage, over-current, winding open circuit, and position deviation
Non-volatile Storage: Configuration parameters stored in internal MCU FLASH
Operating Temperature: 0°C to +40°C
Operating Humidity: 20% RH to 90% RH

Mechanical Drawing: Detailed mechanical drawings are available for precise integration and installation.

Catalog excerpts

NEOTON MOTOR 86 mm RS485 Multi-turn Absolute Integrated Stepper Servo 86BH181RS125IM The 86BH181RS125IM is the highest-torque 86 mm RS485 integrated stepper servo in the supplied group. Its 12 N-m maximum output torque, battery-free multi-turn feedback and integrated construction support demanding transfer, robot-arm and industrial automation axes where position recovery and simplified wiring are valuable. • 12 N-m maximum output torque • Battery-free multi-turn feedback: -100 to +1499 turns • 18-70 VAC input and integrated drive/encoder architecture Frame Size Integrated Body Length L Size Shaft Diameter Input Voltage Range Maximum Output Torque Communication Current Setting Encoder Feedback Phase Resistance Phase Inductance Rotor Inertia Weight Microstep Setting Address Setting Multi-turn Feedback Non-volatile Storage 0.2-3.2 A software adjustable; factory-matched motor: 6.0 A 4096 lines (16,384 counts) encoder feedback 0.79 D ±20% Host configuration; positive integer above 200; factory default 4000 Factory default 1; start address adjustable by host software 1,599-turn battery-free multi-turn feedback; fixed range -100 to +1499 turns Over-voltage, under-voltage, over-current, winding open circuit and position deviation Configuration parameters stored in internal MCU FLASH Operating Temperature Operating Humidity

Open the catalog to page 1

MECHANICAL DRAWING — 86 MM RS485 INTEGRATED STEPPER SERVO NEOTON MOTOR | www.neotonmotor.com | [email protected] | Generated October 1, 2026

Open the catalog to page 2

All NEOTON MOTOR catalogs and technical brochures

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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