Royce Onsite Machining Ltd

Royce Onsite Machining delivers professional in-situ crankpin machining services for diameters from 75mm to 2000mm. Our advanced portable machining equipment enables us to perform precise machining on both large and small crankpins right at your location, eliminating the need for expensive dismantling and transportation costs. Trust Royce Onsite Machining for efficient, on-site solutions that save you time and money.

Royce Onsite Machining is globally recognised as a premier provider of emergency crankshaft repair and crankshaft grinding services, catering to all major industries across every continent. With over 50 years of experience, we have established a comprehensive knowledge base in crankshaft grinding machine repair and in-situ crankshaft machining.

Our expert teams swiftly deploy a diverse range of machining skills and techniques for crankshaft, crankpin, and main bearing repairs on both large and small engines.

Having successfully completed numerous complex on-site repairs worldwide, Royce Onsite Machining helps our customers avoid the expensive and risky process of engine disassembly and remote workshop removal.

At Royce Onsite Machining, we specialise in shaft journal repair, journal machining, and the onsite restoration of worn or damaged bearing journals across various applications, including pumps, motors, turbines, generators, and marine equipment. Our advanced orbital machining systems enable us to perform repairs without the need to remove or rotate the shaft, ensuring precise restoration of geometry while significantly reducing both downtime and costs. Trust Royce Onsite Machining for efficient and reliable solutions to your journal repair needs.

Crankshafts are often subjected to increased hardness and bending (runout) due to high heat exposure and rapid cooling following a failure. This process frequently leads to conditions that exceed OEM tolerance limits, resulting in significant stress on the component.

At Royce Onsite Machining, we employ specialised ceramic blankets to carry out controlled crankpin annealing—a precise heat treatment method aimed at decreasing both hardness and runout. When used alongside our advanced precision machining services, this technique effectively restores crankshafts to meet OEM specifications.

Our annealing process can lower crankpin hardness by up to 300 HB, effectively mitigating harmful excess hardness and considerably enhancing the longevity of your crankshaft.

Royce Onsite Machining is a leading provider of precision on-site line boring services, designed specifically for large plant components that are impractical to transport to a workshop. Our expert team specialises in machining individual bores on items such as diesel engine bedplates, cylinder blocks, liner landings (including inserts), and various other large equipment that have experienced wear or erosion.

Our on-site line boring services encompass a wide range of capabilities, including the machining and alignment of multiple in-line bores, such as main journal pockets, with exceptional accuracy—even when the bores are spaced several metres apart. Trust Royce Onsite Machining for reliable and efficient solutions to your machining needs.

Whether you require the removal of existing fitted blades from turbine casings or the modification of grooves to accommodate new blades, Royce Onsite Machining offers the expertise and specialised equipment necessary to execute these complex tasks with precision and reliability. Our tried-and-tested techniques guarantee accurate machining that adheres to industry standards, thereby enhancing the service life of your turbine components.

Royce Onsite Machining provides expert onsite milling services for a diverse array of industrial applications. Utilising state-of-the-art portable milling machines, we deliver precise surface machining directly at your location. This approach not only saves valuable time but also eliminates transport costs and minimises downtime.

Royce Onsite Machining offers professional on-site flange facing services throughout the UK and offshore. With our advanced portable machining solutions, we efficiently and safely repair worn or damaged flange faces to meet industry standards, eliminating the need for equipment dismantling.

Our company offers expert onsite machining and polishing services for tailshaft journals, effectively eliminating signs of damage while preserving precise concentricity and roundness in accordance with OEM tolerances. This specialist repair is usually completed within just a few days, ensuring a quick turnaround for your operations. To further accelerate the process, customers can pre-bore undersized bearings, which significantly reduces downtime.

Royce Onsite Machining specialises in cold metal stitching, an innovative and proven method for repairing cracks and fractures in cast iron components, such as diesel engine crankcases and other heavy-duty machinery parts. This non-invasive repair technique enables us to restore structural integrity without resorting to welding or complete part replacement.

Our team of skilled technicians can tackle even the most challenging repairs, including cases where significant sections of the casting have broken away. By employing cold metal stitching, we meticulously insert metal locks or “stitches” to securely rejoin the fractured areas. This process takes place on-site, ensuring minimal downtime and eliminating the need for expensive removals or shipping.

One of the standout advantages of cold metal stitching is that the repaired sections often rival, if not exceed, the strength of the original casting, providing a durable and reliable solution. This method also preserves the original metallurgy, avoiding heat distortion or additional stress that can occur with welding.

We implement this technique across a range of sectors where cast iron components are vital, including marine engines, industrial machinery, and power generation equipment. Our on-site repairs not only save time but also reduce costs by extending the lifespan of essential parts while upholding safety and performance standards.

At Royce Onsite Machining, we specialise in liner landing machining and repair for engine blocks, cylinder heads, and sleeves. Whether you're preparing for new liner installation or addressing issues such as wear, corrosion, distortion, or damage, our expert team offers precise in-situ machining of liner landing surfaces directly on-site. This approach minimises downtime and ensures effective solutions tailored to your needs.

At Royce Onsite Machining, we specialise in the restoration of damaged or stripped threads in metal components, including engine blocks, machine housings, and mechanical assemblies. Our expert thread repair service, delivered by our specialised team, offers precision drilling and reaming to effectively prepare damaged areas for robust thread repairs. Whether at your location or in our fully equipped workshop, we ensure high-quality service tailored to your needs.

At Royce Onsite Machining, we are proud to cater to a wide array of industries, with a particular focus on the rigorous demands of the oil and offshore sectors. We recognise the extreme conditions that characterise offshore operations—ranging from saltwater corrosion to high-pressure environments—and we adapt our services to meet these specific challenges. Our team of expert technicians is not only exceptionally skilled in maintaining and repairing offshore machinery, but they are also comprehensively trained to navigate the unique difficulties presented by remote, marine-based settings.

From compact power generation sets to large-scale steam turbines, Royce Onsite Machining has proudly supported the power generation sector for decades. Our specialised on-site machine repair services are tailored to meet the varied and demanding requirements of power generation facilities across the UK.

With extensive experience, profound technical expertise, and an unwavering commitment to excellence, we have become the trusted partner for comprehensive power generation repairs.

As global energy demand continues to escalate, the necessity for a reliable and consistent power supply has never been more critical. Our adaptable teams of engineers work closely with original equipment manufacturers (OEMs), operators, and service providers to facilitate new installations, routine maintenance, and emergency repairs.

At Royce Onsite Machining, we understand the essential nature of uninterrupted power generation. Our bespoke, 24/7 service guarantees a rapid response and efficient repairs, minimising downtime and maximising the availability of your assets.

Trust us to restore your power generation assets swiftly and reliably — because every moment of power counts.

At Royce Onsite Machining, we understand the critical need to minimise downtime and swiftly restore your vessel to operational status. Our experienced team of engineers has been providing support to the marine and shipbuilding industry for decades.

As a consequence, Royce Onsite Machining has earned a reputation as a leading company worldwide, renowned for delivering high-quality marine machinery repair services.

At Royce Onsite Machining, we establish the industry standard for dependable and precise machine maintenance in the demanding environments of the petrochemical industry. Our team of highly skilled engineers possesses extensive expertise in advanced on-site machining techniques, utilising state-of-the-art portable equipment to tackle even the most complex challenges.

From repairing leaking flanges to addressing failed compressor crankshafts, we provide swift, responsive solutions that minimise downtime and mitigate costly production losses. Our commitment to maintaining the highest safety and compliance standards ensures peace of mind for our clients.

Operating successfully within the mining, mineral processing, and heavy machinery industries presents numerous challenges. Tight maintenance budgets, rigorous production schedules, and limited access to skilled labour can all lead to unexpected downtime and diminished productivity.

To remain competitive, mining facilities require a reliable engineering partner capable of providing swift, efficient, and effective repair and maintenance services. Here at Royce Onsite Machining, we are committed to meeting those needs.

Our expert team specialises in on-site machining services for a diverse range of construction assets across industrial, commercial, and residential building sites. We provide precision line boring for major infrastructure projects, such as nuclear power plants and bridges, as well as metal stitching for storage tanks and docking facilities. Our commitment is to deliver expert repairs precisely where they are required.

We recognise that time is of the essence in construction projects. That’s why we offer a 24/7 service to minimise downtime and prevent project delays. Many construction assets are either too large or permanently installed, making off-site repairs impractical. Our on-site machining solutions eliminate the need for dismantling, saving you both time and money while ensuring unmatched precision and reliability.

Royce Onsite Machining was engaged to perform an urgent in-situ crankshaft repair following a major engine failure on a power generation unit. Crankpin No. 6 displayed noticeable surface damage, heat cracks, and excessive hardness readings of 600 Brinell — significantly exceeding OEM operating limits.

To avoid a complete crankshaft replacement and minimise extended downtime, the client required a thorough in-situ recovery. Our skilled technicians were mobilised within days to assess, machine, heat-treat, and fully restore the crankpin — all without the need to remove the crankshaft from the engine block.

Royce Onsite Machining was commissioned in Asia to address significant fretting damage to main bearing pocket No. 8 of a large engine, alongside misalignment that exceeded OEM tolerances. Our expert team provided a comprehensive on-site laser alignment and machining service — all achieved without the need to remove the engine.

Royce Onsite Machining was engaged by Melita Marine Group to perform a precise in-situ repair on a historic vessel after a propeller failure. This incident resulted in extensive damage to the taper journal on the propeller shaft, a crucial component that necessitated accurate restoration to prevent the costly requirement of a complete shaft replacement. Our expert onsite machining services ensure that we can effectively address such challenges, preserving the integrity of historic vessels while minimising downtime and repair costs.

Royce Onsite Machining was enlisted to execute an urgent in-situ thread repair on a vital power generation unit. The failure of the threaded connection posed a risk of significant downtime and the necessity for component replacement. To prevent disassembly and avoid operational delays, the client sought a swift on-site solution. Royce provided and installed a precision-engineered oversize insert, effectively restoring the thread to OEM specifications — all accomplished without the need to remove the component from its assembly.