Product Short Description
Product Name: EC304 Servo Motor (Size 4 EC-MOTOR), part of the EC300 series
Product Description: The 0608701018 is a Size 4 EC-MOTOR (EC304) — a three-phase AC permanent-magnet synchronous servo motor with integrated drive electronics. It is designed to be bolted onto a planetary gearbox and connected via cable to a Bosch Rexroth servo amplifier, forming part of an industrial tightening spindle system.
Description
Technical Specifications (EC304 within EC300 family):
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Order Number: 0 608 701 018
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Nominal Size: Size 4
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Maximum Torque (Ms): 3.2 N·m
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Maximum Current (Imax): 28 A DC
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Maximum Speed (n_max): ±20,000 min⁻¹
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Ambient Temperature: 0–55 °C
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Maximum Housing Temperature: 100 °C
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Protection System: IP54
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Weight: 2.8 kg
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Compatible Servo Amplifier: LT304 / LT305
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Material: Housing constructed of ductile cast iron (球墨铸铁) for mechanical robustness
Working Principle: The EC motor receives DC power, which is internally inverted to three-phase AC via six inverter modules. It uses rotor position feedback and operates as a brushless, maintenance-free permanent-magnet synchronous motor. Integrated smart control module provides RS485 output, 0–10 V sensor output, 4–20 mA speed-control switch output, alarm output, and master-slave signal output.
Functional Features: High intelligence, high energy efficiency, high power density, long service life, low vibration, low noise, capable of uninterrupted continuous operation.
Application Scenarios: Installed on fixed tightening spindles for industrial fastening tasks — from intelligent wireless nutrunners (Nexo) to ergonomic handheld tightening tools (ErgoSpin) and fully automated tightening systems.
Installation Requirements: Bolt the EC motor onto the planetary gearbox using a protective clamp, applying uniform torque of 45–50 N·m. Ensure the mating surface between motor and gearbox remains well-aligned to distribute stress evenly. Connect the 14-pin connector (male, viewed from EC motor) to the X5 interface of the servo amplifier (LT303–LT305).
Precautions: Housing temperature may exceed 100 °C during operation — risk of burns; allow cooling before handling. Only qualified, trained personnel may perform hardware/software modifications. Use protection caps on electrical interfaces of motor and sensor, or use plug-in sensor wiring.
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