Woodward SMM40 Speed Adjusting Motor (1766-523) Overview

Brand Background

Woodward is a globally recognized designer and manufacturer of energy control and optimization solutions, specializing in turbine and engine governing systems. Within heavy marine engineering, power generation, and industrial process control, Woodward provides precision actuators, electronic controls, and mechanical accessories engineered for extreme reliability, exact mechanical actuation, and long-term operating continuity under demanding operational environments worldwide.

SMM40

Model Overview: SMM40 Speed Adjusting Motor (Part Number: 1766-523)

The Woodward SMM40 (Catalog / Part Number: 1766-523, manufactured by Sawamura Denki Kogyo for Woodward Governor Japan Ltd.) is a specialized Governor Speed Adjusting Motor designed for integration into industrial and marine engine governor systems, such as the Woodward UG8 governor platform.

Serving as a precise electro-mechanical actuator, this motor is engineered to adjust the speed reference input and setpoints of mechanical or electronic governors. It provides exact positional control to regulate engine speed, ensuring accurate load distribution, propulsion stability, and optimal fuel efficiency.

Key Technical Specifications and Parameters

• Manufacturer: Woodward Governor / Sawamura Denki Kogyo (Made in Japan)

• Model Name / Designation: SMM40 Governor Speed Adjusting Motor

• Part / Catalog Number: 1766-523

• Operating Voltage: 24V DC

• Current Rating: 0.15 A

• Safe Torque Output: 0.2 N.m (or 0.2 kgf·cm class)

• Speed Setting: Speed Class 2 (approx. 2 RPM)

• Form Factor: Compact, ruggedized electrical motor assembly designed for direct mounting onto engine governor housings or control actuator enclosures

Operating Industries

The Woodward SMM40 speed adjusting motor is deployed primarily across maritime sectors, power generation plants, and heavy industrial applications utilizing diesel or gas engines governed by Woodward systems:

• Commercial Marine & Shipping: Main propulsion diesel engines and auxiliary generator sets on container ships, bulk carriers, oil tankers, and chemical tankers.

• Offshore Energy & Support Vessels: Dynamic positioning ships, platform supply vessels (PSVs), and floating production units requiring tight engine speed regulation.

• Power Generation & Utilities: Standby and continuous diesel generator power plants requiring automated or remote speed synchronization.

• Industrial Diesel Machinery: Heavy industrial and land-based engine setups utilizing mechanical governors for process drive control.

Common Usage Scenarios

1. Main Engine Governor Speed Setpoint Adjustment

   Remotely or automatically modifying engine speed reference points from the bridge or engine control room during vessel maneuvering and sea passage operations.

2. Auxiliary Generator Load Sharing and Synchronization

   Adjusting auxiliary engine speeds to match electrical grid frequencies and balance active power loads across multiple generators.

3. Precision Actuation in Mechanical Governors

   Providing low-power, high-accuracy rotational movement to internal governor linkage mechanisms for stable fuel rack positioning.

4. Governor System Maintenance and Overhauls

   Serving as a direct replacement component during routine engine servicing, governor rebuilding, or control system retrofits to restore reliable speed adjustment functionality.