Shaft Lok: Advanced Propeller Control

Properly Positions, Locks and Automatically Unlocks the Propeller Quickly and Easily Without Leaving the Cockpit!

Sail Faster

A locked shaft means reduced drag from spinning propeller

Sail Quietly

A locked shaft means transmission noise is eliminated

Marine-Grade

Built for harsh marine environments

Compatible with Borg Warner, Paragon, Hurth and Volvo Penta Transmissions
Shaft Lok propeller control system with blue transmission housing

Shaft Lok History

By Kenneth R. Nigel | July 28, 2023

The Beginning

In 1978, Dick Badzinski and George Nigel, both sailboat owners, faced a common problem: propellers spinning freely while sailing, causing reduced speed, noise, and drive train wear.

"It was like a dripping faucet which just got on one's nerves." - Kenneth Nigel

The Invention

Kenneth, working at Rex Chain Belt in Milwaukee, encouraged pursuing the invention for worldwide marketing. They built a working model and secured three patents through a Boston connection, maintaining confidentiality during the patent filing process.

Early Success

The founders pooled resources for marketing materials and advertising. Their breakthrough came at the Chicago Boat Show with Borg Warner, leading to overwhelmingly positive dealer response and the first Mod I shipments in 1979.

Innovation & Patents

The company evolved from a 2V design to the Easy Lok concept, improving ease of use. U.S. Patents awarded: #4389199 and #D271583

By The Numbers

Four decades of marine excellence and innovation

1979 Since
1390+ Units Shipped
50+ Boat Types
23+ Transmissions
2 Patents

Noteworthy Features

Advanced engineering for marine excellence

  • No power required - saves batteries, no wires or hoses
  • Simple design with few moving parts, easy installation
  • Stainless steel spring "engine" with thousands of life cycles
  • Marine-grade polyurethane housing for saltwater environments
  • All-stainless steel hub, bracket and fasteners
  • Maintenance-free ball bearing system