Description
WOODWARD GOVERNOR (JAPAN) LTD.
SAWAMURA DENKI KOGYO CO., LTD.
TYPE: SMM40
GOVERNOR SPEED ADJUSTING MOTOR
P/N: 1765-825
VOLTS: 110V AC 50/60HZ SPD: 3
AMPS: 0.3A SAFE TORQ: 0.2 N.M
The Woodward SMM40 (P/N 1765-825) is a dedicated governor speed adjusting motor designed to provide accurate, motorised speed reference adjustment within Woodward marine governor control systems. Manufactured through Sawamura Denki Kogyo Co., Ltd. for Woodward Governor (Japan) Ltd., this compact actuator motor interfaces directly with the governor’s speed setting mechanism, enabling remote or automated adjustment of engine speed set-points. As part of a Marine Control System, it plays a critical role in maintaining stable propulsion and auxiliary engine operation aboard commercial and industrial vessels, directly influencing engine load response, fuel efficiency, and overall plant reliability.
Key Features
✓ Functions as a motorised speed reference actuator within the Woodward governor control loop, enabling precise remote adjustment of engine speed set-points.
✓ Rated at 110V AC, 50/60 Hz, drawing 0.3A, with a safe output torque of 0.2 N·m and speed setting of SPD 3 — all as stated on the original nameplate.
✓ Designed for compatibility with Woodward governor systems where the SMM40 motor interface is specified; suitability with specific governor models or control panels is subject to confirmation against installation drawings.
✓ Compact motor assembly suited for panel-mounted or governor-adjacent installation in machinery control rooms or engine room governor enclosures, typically in dry, protected environments.
✓ Direct OEM replacement reference (1765-825) supports like-for-like swap-out during planned maintenance or corrective action, minimising governor downtime and recalibration requirements.
Marine Applications
✓ Main propulsion diesel engine governor systems aboard cargo vessels, tankers, and bulk carriers requiring remote speed set-point adjustment.
✓ Auxiliary diesel generator governor control on vessels where Woodward SMM-series adjusting motors are integrated into the power management or automatic voltage/frequency regulation system.
✓ Engine room automation systems on offshore support vessels, platform supply vessels, and tugs where governor motor reliability is critical to dynamic positioning or load-sharing performance.
✓ Retrofit and upgrade projects replacing worn or failed speed adjusting motors within existing Woodward governor assemblies on mid-life vessels.
✓ Commissioning and sea-trial configurations where precise, repeatable speed reference control is required across varying load and environmental conditions.
Why Marine Engineers Choose
The Woodward SMM40 governor speed adjusting motor is specified by engineers who require a direct, nameplate-matched replacement for a safety-critical component in the engine control loop — where incorrect motor torque, voltage rating, or interface type can compromise governor stability and engine response.
Ideal For
Cargo ships, bulk carriers, tankers, offshore support vessels, platform supply vessels, tugs, ferries, and any commercial or industrial vessel operating Woodward governor systems that incorporate SMM-series speed adjusting motors.
Technical Support & Compliance
Technical assistance is available to support installation verification, functional testing, commissioning, and integration of this governor motor into existing control systems. Remote troubleshooting guidance and onboard support can be arranged depending on vessel location and scope. For retrofit or upgrade projects, compatibility with the specific governor model and control panel configuration should be confirmed before ordering — subject to confirmation based on customer-supplied information. To confirm suitability, buyers are encouraged to share nameplate photographs, the full part number, governor model and system drawings, control panel model or software version, and vessel name or IMO number where applicable.
