Product Overview

The Mitsubishi HG-KR43K is a high-performance, low-inertia AC servo motor belonging to the flagship MELSERVO-J4 series. Engineered for industrial automation environments requiring rapid acceleration and high-frequency positioning, this motor delivers exceptional power density in a compact frame. It features a built-in 22-bit high-resolution absolute encoder, providing 4,194,304 pulses per revolution to guarantee superior synchronization and stability even at low speeds. The HG-KR43K serves as a critical component in semiconductor manufacturing, high-speed packaging lines, and multi-axis robotic systems, where precision and reliability directly impact production throughput.

Key Engineering Advantages

This motor utilizes a refined magnetic design that minimizes torque ripple, ensuring smooth mechanical motion and protecting delicate transmission components. The low-inertia rotor allows the system to respond instantaneously to complex motion profiles and high-speed command cycles. With an IP65-rated housing, the unit resists ingress from cooling lubricants, oil mist, and non-corrosive dust, maintaining operational integrity in harsh machining environments. Furthermore, the "W/KEY" shaft configuration provides a secure mechanical interface, preventing coupling slippage during high-torque reversals and ensuring absolute precision in power transmission.

Technical Specifications

Installation Guide

Technical personnel must ensure shaft alignment accuracy within 0.03mm to prevent premature bearing wear caused by excessive radial loads. During electrical integration, use shielded twisted-pair cables for the encoder signal to mitigate EMI and ensure the motor frame is grounded to a common busbar. For the HG-KR43K with a keyway, avoid using impact tools such as hammers during the mounting of pulleys or couplings, as shock loads can shatter the internal glass disk of the high-precision encoder. Utilize a dedicated puller tool for all assembly and disassembly tasks to preserve the integrity of the shaft and internal sensors.

Engineering Advantages

The HG-KR43K integrates seamlessly with MR-J4 series amplifiers, enabling advanced "One-Touch" auto-tuning that optimizes gain parameters based on real-time load inertia. Its thermal resilience and vibration-resistant architecture ensure that rated power output remains consistent without significant derating, even in demanding industrial cycles. This robust design reduces commissioning time for system integrators and lowers the total cost of ownership by extending the maintenance intervals of the motion control system.

Delivery & Logistics

Delivery Time: 3-5 days once payment is finalized.

Shipping Carriers: Shipped via DHL, FEDEX, or UPS with full tracking and insurance.

Technical FAQs

Q1: Is the HG-KR43K a direct drop-in replacement for the older HF-KP43K?

A1: Yes, the HG-KR43K is the functional successor to the HF-KP series. It maintains compatible mounting flanges and shaft dimensions but must be paired with an MR-J4 series drive for full functionality.

Q2: Does the IP65 rating apply to the shaft passing portion?

A2: The IP65 rating covers the motor body and connectors. For applications requiring full protection against liquid ingress at the shaft, an optional oil seal must be installed.

Q3: Can this motor operate in incremental mode if absolute positioning is not required?

A3: Yes, the 22-bit encoder is versatile. You can configure the motor to operate in either absolute or incremental mode via the servo amplifier parameter settings.

Q4: What is the benefit of the "W/KEY" shaft for high-speed applications?

A4: The keyed shaft (complying with JIS B 1301) provides a positive mechanical lock. This is essential for preventing axial or rotational slip during the rapid deceleration phases common in high-speed 6000 RPM cycles.