HG-KR73J Servo Motor | Mitsubishi MELSERVO 0.75kW IP65 Low-Inertia

HG-KR73J – Mitsubishi MELSERVO Low-Inertia Servo Motor (0.75kW)

HG-KR73J is a small, low-inertia servo motor. It gives 0.75 kW power and 2.4 Nm torque. Great for fast start-stop jobs like robots and CNC.

📁 Technical Specifications – Tree View

• ├─ Core Identification
  • │ ├─ Brand: Mitsubishi Electric
  • │ ├─ Model: HG-KR73J
  • │ ├─ Series: MELSERVO (HG Series)
  • │ └─ Type: Low-inertia, small-capacity servo motor
• ├─ Power & Torque
  • │ ├─ Rated output power: 0.75 kW
  • │ ├─ Rated torque: 2.4 Nm
  • │ └─ Max torque (peak): 8.4 Nm
• ├─ Speed & Current
  • │ ├─ Rated speed: 3000 rpm
  • │ ├─ Max speed: 6000 rpm
  • │ ├─ Rated current: 4.8 A
  • │ └─ Max current: 17 A
• ├─ Feedback & Precision
  • │ ├─ Encoder type: 22-bit absolute / incremental
  • │ └─ Resolution: 4,194,304 pulses per revolution
• ├─ Environmental & Protection
  • │ ├─ Enclosure rating: IP65 (dust-tight & water jets)
  • │ ├─ Oil seal: Yes (protects from oil)
  • │ ├─ Operating temp: 0 to +40°C (no freezing)
  • │ └─ Storage temp: -15 to +70°C (no freezing)
• ├─ Design & Features
  • │ ├─ Shaft type: Straight shaft (standard)
  • │ ├─ Electromagnetic brake: Not included
  • │ └─ Thermistor: Not included
• └─ Physical Data
  • ├─ Weight: 11.00 lbs (4.99 kg)
  • └─ Power supply: 200V AC

🔄 Compatibility

• Works with Mitsubishi MR-J4 and MR-J5 series servo amplifiers.
• Matches HG-KR series drives for plug-and-play.
• 22-bit encoder works with SSCNET III/H controllers.
• Compatible with 3300 5mm Proximity Probes for vibration monitoring in machines.

✅ Certifications & Standards

• CE marked (EMC & Low Voltage Directive)
• UL/cUL recognized
• RoHS compliant
• IP65 rated (IEC 60529)

📦 Package, Warranty & Delivery

• In box: HG-KR73J motor, shaft key, quick start guide, oil seal installed.
• Warranty: 12 months from invoice date (parts & labor).
• Shipping: 12-24 hours dispatch for in-stock items.
• Carriers: FedEx, UPS, DHL express worldwide.

📌 Expert Review & Manager’s Insight

• 🔍 Expert Review – Motion Control Specialist:

  “HG-KR73J gives 6000 rpm top speed with low rotor inertia. Perfect for high-frequency pick-and-place. IP65 plus oil seal means it survives coolant and dust. A reliable workhorse for 0.75kW axes.”

• 📈 Manager’s Insight – Automation Product Lead:

  “This motor saves cabinet space. No brake, no thermistor – simple and cost-effective. 22-bit encoder gives smooth motion even at low speeds. Stock ready for OEMs and retrofit projects.”

🏭 Applications & Suitable Equipment

• CNC machines: Tool changers, small milling axes.
• Robotic arms: Joints for light payload robots (≤10kg).
• Pick-and-place systems: Fast start-stop cycles.
• Packaging machines: Rotary indexers, label feeders.
• Electronic assembly: PCB solder paste dispensers.
• 3D printers (industrial): High-speed motion axes.

❓ FAQ – Professional Answers

• Q1: Which amplifier works best with HG-KR73J?

  Use MR-J4-10A or MR-J4-20A. For new designs, MR-J5 series also works with proper settings.

• Q2: Can I add an external brake?

  Yes, but this model has no built-in brake. You can add a shaft-mounted brake externally. Contact us for kits.

• Q3: (Experience) Motor gets hot at 4000 rpm – is that normal?

  Yes. Continuous high speed causes heat. Ensure ambient under 40°C and add cooling fan if needed.

• Q4: What is the encoder output format?

  22-bit serial absolute/incremental. Works with Mitsubishi’s own protocol. Not compatible with generic drives.

• Q5: Buying guide – warranty and delivery details?

  12-month warranty against defects. Ships in 12-24 hours via FedEx, UPS, or DHL. Express tracking provided.

🛒 Selection Tips

• Match motor power (0.75kW) with amplifier rated current ≥4.8A.
• For vertical loads, choose a motor with electromagnetic brake (HG-KR73JB variant).
• Use shielded motor cables to reduce electrical noise.
• IP65 allows washdown but not submerged use. Avoid strong acid/alkali.
• Need a thermistor? Select HG-KR73J with optional thermal protector (ask sales).

📞 Get in touch: Email sales@powergearx.com or
WhatsApp +86 18030005825. We reply within hours.

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