SIEMENS 1HU3074-0AC01-0ZZ9-Z DC Motor with Tacho + Z: G45 Brake

Buy online your SIEMENS 1HU3074-0AC01-0ZZ9-Z DC Motor with Tacho + Z: G45 Brake from US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

This SIEMENS 1HU3074-0AC01-0ZZ9-Z is a 1HU DC servo motor designed for legacy CNC machines and industrial equipment using analog tachometer feedback for speed regulation. It is suitable for feed-axis and auxiliary motion applications on machine tools that rely on DC servo technology, making it a practical CNC replacement motor, replacement unit and industrial spare part.

The motor features an integrated tacho generator for closed-loop speed control, allowing compatible DC drive systems to maintain stable motor speed without modifying the original control architecture. The integrated G45 holding brake provides secure mechanical holding at standstill and is particularly useful for vertical axes, fixtures and applications where the axis must remain safely positioned when power is removed.

This SIEMENS 1HU configuration is rated at up to 7 Nm with a maximum speed of 2,000 rpm. It features a 24 mm straight keyed shaft, flange mounting and an integrated tachometer. The supplied configuration also includes Heidenhain ROD320 feedback, as specified for this motor, providing the required position feedback for compatible CNC applications.

Manufactured in Germany, the 1HU3074-0AC01-0ZZ9-Z is suitable for legacy CNC lathes, milling machines, grinders and other machine tools using DC servo drive systems. Matching the complete reference and feedback configuration is essential when replacing the original motor in order to preserve the mechanical mounting, electrical characteristics, feedback and brake functions.

Keeping a tested replacement motor in industrial spare inventory can help reduce downtime on aging CNC equipment. This motor is suitable for preventive maintenance, emergency replacement, machine rebuilds and retrofit projects where maintaining the original DC drive architecture is preferable to a complete control-system redesign.

Each motor supplied by Cnc-shopping can be assessed on appropriate CNC test equipment to verify the tachometer output, electrical insulation and brake operation when applicable. Units are securely packaged with protection for the shaft and connectors during industrial transportation. Products can be supplied with a commercial warranty, fast dispatch within 3 days depending on availability, worldwide shipping, obsolete-part sourcing, repair service and exchange service according to stock and condition.

Frequently asked questions about 1HU3074-0AC01-0ZZ9-Z:

Is the integrated brake suitable for vertical axes?
Yes, the built-in G45 brake is intended to hold the axis at standstill, which is typically required on vertical axes or fixtures. Always verify torque ratings on the machine nameplate and compare to the original motor data.

What feedback does this motor provide to the drive?
This configuration includes an analog tacho generator used for speed feedback in DC servo loops. It is intended for controllers and drives that are designed to read a tacho signal rather than a digital encoder.

Can it be used as a drop-in replacement for the same code?
When the machine was originally equipped with the same 1HU3074-0AC01-0ZZ9-Z reference, it is typically a direct swap that maintains feedback and brake functions. Verify mechanical dimensions, connector orientation and wiring against your original documentation.

What should be checked during replacement?
Match the full nameplate code, confirm brake voltage and wiring, and ensure the tacho polarity is consistent with the drive. After installation, run a controlled axis test to validate speed feedback and holding behavior.