Since 2006, Randolph Manufacturing Australia has been proudly owned and distributed by Proton Engineering. As the home of Randolph Gearboxes Australia, we provide specialised expertise in the service, repair, and complete rebuild of industrial and agricultural gearboxes.

Our qualified tradesmen carry out one-off repairs, full gearbox rebuilds, detailed inspections, and the supply and fitment of power take-off shafts, gaskets, and replacement components. We don’t just service industrial gearboxes — we also distribute and supply a comprehensive range of components required throughout the repair process.

Customers can easily source spare parts for right-angle gearboxes, including bearings, oil lines, seals, and other essential components. With shipping available across Australia and New Zealand, we ensure fast and reliable access to the parts and support you need to keep your equipment operating efficiently.

Whether you require a minor repair, a major rebuild, or quality replacement parts, Proton Engineering delivers dependable service backed by decades of hands-on industry experience.