Close-up view of several interlocking, metal gears covered in oil, showing shiny, toothed edges and an industrial, mechanical setting.

Gearbox Refurbishment

At Llewellin’s Gears, we specialise in gearbox refurbishment services, restoring your worn or damaged gearboxes to peak performance. Whether you’re looking to extend the life of an existing gearbox or need an overhaul to improve efficiency, our team has the expertise and equipment to handle any project.

Close-up view of a metallic blue gearbox or transmission system, showing detailed gears, shafts, and mechanical components inside the cutaway housing.

Our Gearbox Refurbishment Capabilities

Worm & Wheel Gearboxes
Extruder Gearboxes
Bevel Gearboxes
Spiral Bevel Gearboxes
Helical Gearboxes
Planetary Gearboxes

Capacity

Gearbox Weight: Up to 5.5 tons.

Methods

Complete Disassembly – Removal of worn or damaged components.

Inspection & Diagnostics – Thorough testing to identify issues and determine necessary repairs.

Component Repair or Replacement – Gear replacement, shaft refurbishing and replacement, bearing and seal replacement.

Reassembly – Rebuilding the gearbox to original manufacturer specifications.

Lubrication & Sealing – Re-lubrication and replacement of seals to prevent future failures.

Testing – Rigorous performance testing to ensure optimal functioning after refurbishment.

Applications

Our refurbishment services are trusted across a range of industries, including:

Heavy Equipment – Crushers, conveyors, loaders.
Aerospace & Defence – Gearboxes in ground support equipment and testing rigs.
Plastics Industry – Extruders, pelletizers, and moulding machinery.
Agriculture – Tractors, balers, and harvesting machines.
Mining – Gearboxes in feeders, mills, and drills.
Power Generation – Wind turbine gearboxes, hydro systems.
Food & Beverage – Washdown-rated gearboxes in mixers and conveyors.
Cement & Steel – Kilns, mills, and rolling equipment.
Rail & Transport – Locomotive and bogie gear units.
Renewable Energy – Solar trackers, wind farms, and biomass systems.
Marine & Offshore – Winches, propulsion, and crane drives.

Close-up view of metal gears, shafts, and mechanical components inside an automobile transmission system, showcasing intricate engineering and precision machinery.

Benefits

Cost-Effective – Save money by refurbishing instead of replacing.
Improved Performance – Restore lost efficiency and functionality.
Extended Lifespan – Increase the lifespan of your gearbox and reduce downtime.
Eco-Friendly – Reduce waste and support sustainability by reusing existing components.
Quick Turnaround – Minimise downtime with efficient refurbishment processes.

Close-up view of several interlocking metal gears with a blue tint, highlighting their teeth and circular shapes, suggesting machinery or mechanical engineering concepts.

Quality Assurance

Our gearbox refurbishment services are carried out under the strict guidelines of our ISO 9001:2015 certified quality system. Every refurbished gearbox undergoes comprehensive testing and inspection to ensure it meets or exceeds original specifications.

Other Capabilities

Broaching

Llewellin’s Machine Company Ltd excels in broaching, a precise machining process used to cut complex profiles, keyways and splines in gears and components. Our state-of-the-art horizontal and vertical broaching machines adhere to ISO 9001 standards, ensuring tight tolerances and exceptional finish quality.

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Crane Winch Refurbishment

At Llewellin’s, we combine over a century of expertise in the design, manufacture, and maintenance of offshore winches and gearboxes.

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Gear Cutting

Established in 1883, Llewellin’s has been at the forefront of Britain’s gear manufacturing industry for over a century.

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Gear Grinding

Llewellin’s specialises in precision gear grinding, a vital process in the manufacture and finishing of gears for optimal performance.

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Grinding

Llewellin’s Machine Company Ltd offers advanced grinding capabilities using state-of-the-art equipment and techniques. Our precision engineers guarantee all work adheres to stringent industry standards such as ISO 9001 and AS9100, delivering exceptional accuracy and surface finishes for diverse applications. Encompassing surface grinding, cylindrical grinding and centreless grinding, said capabilities are carefully optimised to achieve micron-level tolerances (±0.001 mm) and impeccable finishes. We also offer gear grinding, which you can learn about on its own dedicated page.

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Reverse Engineering

Llewellin’s reverse engineering capability empowers clients to replicate and enhance legacy components, particularly when original designs or tooling are unavailable. Using advanced metrology equipment, including coordinate measuring machines (CMMs) compliant with ISO 10360-2 standards, we create precise 3D models of existing components.

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Slotting

Llewellin’s slotting capabilities enable precision machining for internal keyways, grooves and slots in gears, pulleys and other critical components. Using high-precision vertical slotting machines, we meet tight tolerances in compliance with BS ISO 286 standards.

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Spline Cutting

Llewellin’s are proud to have become recognised as leaders in precision spline cutting and gear manufacturing since first forming back in 1883.

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Tooth Rounding

Llewellin’s tooth rounding capabilities ensure gears meet stringent performance and durability standards, the kinds required in industries such as aerospace, rail and renewable energy.

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Turning & Milling

Our turning and milling capabilities allow us to produce high-precision components for UK clients positioned across a diverse range of sectors, including defence, aerospace and mining.

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Wire Erosion

Llewellin’s Machine Company Ltd is highly proficient in the science of wire erosion, a capability offering unparalleled precision in machining intricate geometries and fine tolerances.

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A vintage yellow and black open-top car with tufted black leather seats, brass headlamps, and large spoked wheels, displayed indoors among other classic vehicles.

Provide a first class service from a long standing professional company run by experienced and proper people. Many thanks for the parts remade for my vintage Peugeot Bebe.