MITSUBISHI HF354BS AC Servo motor 3.5kW 3000rpm Straight Shaft Brake (No Encoder)

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The MITSUBISHI HF354BS is an AC servo motor from the HF series, designed for precision axis control and positioning applications on CNC machine tools and industrial equipment. With a rated power of 3.5 kW and a nominal speed of 3,000 rpm, it provides stable and accurate rotary motion for applications requiring reliable torque and repeatable positioning.

The motor features a 35 mm straight shaft and an integrated electromagnetic holding brake, making it particularly suitable for vertical or inclined axes where the load must be held securely when power is removed. It operates with a 200 V AC class power supply and has an IP67 protection rating.

The HF354BS is supplied without an encoder, allowing the existing feedback device to be reused or a compatible encoder to be installed according to the servo amplifier and CNC control requirements. Correct feedback compatibility is essential for reliable closed-loop positioning and speed control.

This servo motor is suitable for CNC lathes, machining centers, vertical axes, transfer equipment, automated machinery and precision positioning systems. It is an appropriate replacement motor, spare part or CNC replacement component for maintenance, repair and retrofit applications.

Manufactured in Japan, the MITSUBISHI HF354BS can be used as a direct replacement when the mechanical dimensions, electrical specifications and feedback configuration match the original installation. Before replacement, it is recommended to verify the power rating, speed, shaft dimensions, brake specifications, connectors and encoder compatibility to ensure proper integration with the existing servo system.

Frequently asked questions about HF354BS:

Does this motor include an encoder?
No. It is supplied without encoder. Plan to transfer the original feedback device or install a compatible unit that matches your servo amplifier and control.

What is the role of the integrated brake?
The holding brake secures the axis at standstill, especially on vertical or inclined axes, and helps prevent load drift when power is removed. It is intended for position holding, not dynamic stopping from full speed.

What are the key ratings?
The HF354BS is a 3.5 kW AC servo motor with a 3000 rpm nominal speed and a straight shaft. It is suited for medium-power CNC axis duties and general industrial positioning tasks.

Is it suitable as a replacement unit for older machines?
Yes, it is commonly used as a replacement unit on legacy equipment where the HF-series footprint and power class are already established. Always verify mechanical fit, feedback type and drive compatibility before installation.

Can you support repairs or exchanges?
Depending on condition and sourcing, repair service and exchange service can be arranged to reduce machine downtime and control costs. Contact us with your drive model and application details for guidance.