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Welcome to Nauticalloy Marine Propeller Shafting

Millstock Stainless Limited has established itself as a manufacturer of precision ground shafting solutions across diverse industrial applications, with particular expertise within the demanding marine sector. Our experience and commitment to engineering excellence led to the introduction of the Nauticalloy brand in 2012, developed specifically to address the exacting requirements of marine propeller shafting.

The Nauticalloy product line represents the culmination of decades of metallurgical expertise and precision manufacturing capabilities, engineered to meet the demands of modern marine propulsion systems.

Our shafting solutions are manufactured to industry standards, incorporating advanced materials science and production techniques to deliver performance in challenging marine environments.

product 4057 01Precision engineering specifications

  • Diameter Range: comprehensive sizing from 25mm (1 inch) to 350mm (14 inches), accommodating vessels from luxury yachts to commercial marine applications.
  • Straightness Tolerance: 0.127mm (0.005 inch) Total Indicator Reading (TIR) for diameters up to 80mm; 0.254mm (0.010 inch) TIR precision for larger diameters.
  • Length Capabilities: manufacturing capability extending to 15-metre lengths, enabling single-piece solutions for large-scale marine installations.
  • Surface Quality: consistently superior surface finish exceeding 32 Cla specifications, ensuring optimal bearing compatibility and extended service life.
  • Customisation Services: cut-to-length services and bespoke quantity production to meet specific project requirements and delivery schedules.
  • Material Grade Selection: a range of Nauticalloy grades (22HS, 4462, 4542, 4404, 4057, 4501, 4307), each engineered for specific marine applications and environmental conditions.
  • Delivery: established supply chain management and logistics capabilities ensuring prompt delivery to customers worldwide.
  • Quality Assurance: third-party marine inspection and certification services available, ensuring compliance with international maritime standards and classification society requirements.

Distinguished marine projects

Our Nauticalloy marine propeller shafting has been installed in prestigious marine projects, demonstrating our capability to meet the standards of world-renowned shipbuilders and yacht owners:

IMG 1.3

  • Aussie Rules: constructed by Oceanfast for golf legend Greg Norman, showcasing precision engineering in luxury yacht applications.
  • The Eclipse: built by the renowned German shipyard Blohm and Voss, representing superyacht construction excellence.
  • Ilona: crafted by Pendennis Shipyard for a distinguished American client, exemplifying bespoke British shipbuilding heritage.

These installations underscore our position as a preferred supplier for critical propulsion components in the luxury and commercial marine sectors.

Our commitment to shafting excellence, combined with quality control processes and technical support, ensures that Nauticalloy products consistently meet the performance expectations of naval architects, marine engineers and shipbuilders worldwide

 

Related Pages

Product Range    Nauticalloy 4462    Nauticalloy 4542    Nauticalloy 22HS    Processing    Quality

Contact us at +44 (0)1902 409409 or email sales@millstockstainless.com

Group News

Millstock Stainless continued membership of the British Stainless Steel Association

Millstock Stainless is proud to continue its membership with the British Stainless Steel Association (BSSA).

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Millstock Stainless Limited exhibiting at the DPRTE Show in Farnborough on 25–26 March 2026

Millstock Stainless Limited are proud to announce they will be exhibiting at the DPRTE Show in Farnborough on 25–26 March 2026.

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Millstock Stainless Ltd

Fusion House
The Crescent
Willenhall
West Midlands
WV13 2QR
United Kingdom

Phone: +44 (0) 1902 409409

Email: sales@millstockstainless.com

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