Emergency Shaft Lok for a bent shaft or damaged reduction gear
Shaft Lok is a provision to lock and secure the propeller shaft from rotation — for sailing, and for an emergency that leaves the shaft or gearbox compromised.
Typical specification language
The contractor shall include a provision to lock/secure the shaft from rotation in an emergency resulting from a bent shaft or damaged reduction gear. The system shall be capable of locking the shaft at a minimum of 5 knots. Any additional gear or rigging that is necessary to operate the system shall be provided with dedicated, labeled stowage. Instructions, diagrams and any performance limitations shall be clearly identified in a local placard.
Lock the shaft from rotation
Shaft Lok engages the propeller shaft so it cannot freewheel. That is the same mechanical job a specification calls for after a bent shaft or a damaged reduction gear: keep the shaft from rotating until the vessel can be brought in under control.
Underway, including 5 knots
The lock is designed to hold the shaft while the vessel is sailing or otherwise underway. If the contract requires locking at a minimum of 5 knots, send the vessel, shaft, and propulsion details with the quote so we can confirm the correct model for that duty.
Operating gear and stowage
Operation is from the cockpit with a Marine Control Cable, or in the engine room with the Simple Spring Locking System. Any extra gear or rigging needed to operate the system can be quoted with dedicated, labeled stowage when the specification requires it.
Instructions, diagrams, placard
Installation instructions and diagrams ship with the unit. Performance limitations belong on a local placard next to the gear — we can include that wording and a placard with the order when the contract calls for it.
Bidding a spec that calls for a Shaft Lok?
Put the specification text in the quote notes, with shaft diameter, gearbox, and vessel type. We will match a model and note any placard or stowage items the contract lists.