The Golden SEA-Drive is our premier boat lift drive, providing maintenance-free service in a light-weight and corrosion-resistant housing.

General Description

The Superior Gear Co. reducer is a double-reduction worm gear reducer contained in a single housing. It was designed specifically for a boatlift application. The input is a NEMA 56C to allow mounting a standard electric motor directly onto the reducer. The output is a hollow shaft design that is sized to accommodate a standard 2-inch pipe. The connection to the pipe utilizes the cross bolt identical to the current Flat Plate design. This design provides maintenance-free service without grease lubrication intervals or belt drive adjustments.


The housing is a cast-aluminum for light weight and corrosion resistance in salt water and humid environments. The housing is designed to provide separate lubrication reservoirs for the high-speed and low-speed gear sets to ensure proper lubrication without having to overfill. The housing is non-vented to prevent buildup of condensation inside the reducer in humid environments.


The high-speed gear set is a 5:1 for high efficiency. It utilizes a production gear set from an industrial product line designed to AGMA specifications. The worm is made from a heat-treated alloy steel and meshes with a bronze worm gear.

The low-speed gear set is a high-ratio (96:1) designed to have an extremely low helix angle to prevent any possibility of backdrifting. The worm is made from heat-treated allow steel and meshes with a high-strength cast-iron worm gear. The large center distance of the low-speed gear set results in lower tooth loads for a given output torque.



All shafts and gears are supported by deep grove ball bearings to provide precision positioning and high efficiency. The low-speed worm bearings are pre-lubricated and shielded to ensure proper lubrication and contain the lubricant in the high-speed cavity


The Superior Gear Co. reducer is factory filled with a high-quality semi-fluid grease. This high-viscosity grease is capable of handling the high shear stress inherent in worm gear products. The semi-fluid grease greatly reduces the potential for leakage.


The Superior Gear Co. reducer utilizes spring-loaded duel-lip oil seals. The dual-lip design helps protect the sealing lip from outside contaminants and shaft corrosion. The spring-loaded sealing lips are more than capable of handling the small internal pressure that may result from the temperature changes that occur throughout the year.


The Superior Gear Co. reducer is shaft-mounted with a flange to accommodate a torque arm connection to resist rotation of the housing. This allows a flexible mounting system so the housing can move with the shaft without binding. This eliminates the need for a precise machined mounting surface to secure the housing to the frame.
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