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MELSERVO-J5 Series Rotary Servo Motors

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MELSERVO-J5 Series Rotary Servo Motors


Small capacity, low inertia
HK-KT Series

Servo motors with a 26-bit battery-less absolute position encoder
Rated speed: 3000 r/min *1
Maximum speed: 6700 r/min *1
Our product lines includes 400 V and flat type models. The servo motors have an all-in-one connector, making the connection simple.


Medium capacity,
medium inertia
HK-ST Series

Servo motors with a 26-bit battery-less absolute position encoder
Rated speed: 2000 r/min *1
Maximum speed: 4000 r/min *1
The cables for the encoder, the electromagnetic brakes, and the power are equipped with one-touch lock.

  • *1. The speed varies by the model type.

Battery-less Absolute Position Encoder as Standard

Eliminate the Need for Purchase/Replacement/Stock Control


Servo motors come equipped with a battery-less absolute position encoder as standard, making it possible to configure absolute position systems without the use of batteries or any other options.
Moreover, maintenance costs are reduced as a result of eliminating the battery replacement and stock control.

Reduce Wiring for Multi-Axis Systems


In a conventional multi-axis system, battery cables are necessary between the servo amplifiers. Now that the batteries are not required with the use of the battery-less absolute position encoders, wiring battery cables for multi-axis systems is not required.

Save Time in Transporting


Position data remains stored even when the rotary servo motors are disconnected from the servo amplifiers. Thus, control cabinets can be separated from the machines without losing the position data, making it easy to transport machines for use at a new location.
The encoder does not require lithium batteries, allowing machines to be transported by air or sea without special handling.

Single Connector/One-Touch Lock/Single Cable Type

HK-KT Series: Single Connector/Single Cable Type/One-Touch Lock

The single connector for the HK-KT series combines the motor power supply, encoder, and electromagnetic brake into a single cable. The one-touch lock eliminates the need for tightening screws, making wiring easy. The servo motors are also compatible with the dual cable type.
The cables can be mounted either horizontally or vertically according to your selection. The vertically mounted cables are planned for a future release.
Refer to "MELSERVO-J5 catalog" for details of servo motor cables.

Horizontally mounted single cable type with one-touch lock


Horizontally mounted dual cable type with one-touch lock


Vertically mounted single cable type with one-touch lock


Vertically mounted dual cable type with one-touch lock


Connection example of one-touch lock with single cable type


HK-ST Series: One-Touch Lock

One-touch lock


HK-ST series servo motors boast a greatly simplified installation process through use of the one-touch lock system. The one-touch lock can be used to mount connectors for the motor power supply, encoder, and electromagnetic brake, which eliminates the need for tightening screws. The HK-ST series is compatible with both straight and angle type connectors and also supports traditional screw-tightened connectors.

Expanding Combinations of Servo Amplifiers and Servo Motors

Increases Maximum Torque by Combining with Larger-Capacity Servo Amplifiers


  • *1. When the maximum torque of HK-KT 13 W servo motor is increased with the 200 W servo amplifier.


It is possible to increase the maximum torque and achieve a shorter cycle time by combining the servo motor with a larger-capacity servo amplifier.

Drives Smaller Capacity Servo Motors


Servo amplifiers are able to drive servo motors with a smaller capacity than the servo amplifier being used, reducing the kinds of spare parts that are needed.

For example, 400 W servo amplifiers are compatible with the following servo motors: 50 W, 100 W, 150 W, 200 W, and 400 W models.
Refer to "Combinations of Rotary Servo Motors and Servo Amplifiers" for details of the combinations.

Drives 200 V/400 V Class Servo Motors


The 200 V servo amplifiers can drive both 200 V and 400 V servo motors, and the 400 V servo motors may produce torque that is sufficient for operation when combined with smaller-capacity 200 V servo amplifiers.
Lowering of the capacity of the servo amplifier contributes to lower costs and reduced installation space.

Compact Servo Motors with a Battery-less Absolute Position Encoder


HK-KT series servo motors come equipped with a battery-less absolute position encoder and are more compact than the previous generation HG-KR series.
Flat types are also available in the HK-KT product line, contributing to a compact machine design.

Improved Environmental Resistance


Servo motors feature enhanced environmental resistance.
Ingress protection (IP) rating of the servo motors: IP67 *1
Designed for an ambient temperature of up to 60 ℃. *2

  • *1. If the IP rating of the servo motor differs from those of option cables and connectors, overall IP rating depends on the lowest of all.
  • *2. Derate the speed/torque when using the servo motors at high ambient temperatures.