Nauticalloy Processing | Custom Precision Grinding

At Millstock Stainless Limited we deliver Nauticalloy marine propeller shafts that consistently meet the standards of the international marine industry. Our in-house precision centreless grinding facility enables the production of each Nauticalloy shaft to exacting specifications whilst maintaining the dimensional accuracy and surface quality essential for modern marine propulsion systems across commercial, naval and luxury yacht applications.
	Bespoke precision manufacturing approach Customised precision grinding solutions Every Nauticalloy shaft undergoes precision grinding to order, ensuring attention to detail throughout the entire processing route from raw material selection through final inspection. This bespoke manufacturing approach ensures that each marine propeller shaft we produce is tailored to the dimensional, metallurgical and performance requirements of our marine industry clients. Individual processing protocols Each order follows individually developed processing parameters optimised for the specific grade, diameter, length and application requirements, ensuring consistent quality delivery whilst accommodating the diverse specifications encountered across international marine markets.
Manufacturing capabilities Centreless precision grinding technology Extended length capability: accommodation of shafts up to 15 metres in length, enabling single-piece solutions for large-scale installations whilst maintaining dimensional accuracy. Multiple grinding station configuration Machine 1 & 2: diameters from 5 mm to 75 mm (3/16 inch to 3 inches) and lengths from 500 mm and 4000 mm. Machine 3: diameters from 25 mm to 100 mm (1 inch to 4 inches) and lengths from 1000 mm to 6000 mm.
	Machine 4: diameters from 25 mm to 120 mm (1 inch to 4 3/4 inches) and lengths from 1000 mm to 8000 mm. Machine 5: diameters from 50 mm to 165 mm (1 inch to 6 1/2 inches) and lengths from 1500 mm to 12000 mm. Machine 6: diameters from 15 mm to 220 mm (5/8 inch to 8 5/8 inches) and lengths up to 15000 mm. Machine 7: diameters from 80 mm to 350 mm (3 1/8 inches to 14 inch) and lengths up to 15000 mm Straightening technology Multi-capacity straightening facilities: equipped with 300-tonne, 80-tonne and 30-tonne hydraulic presses to ensure optimal shaft straightness across all diameter ranges whilst maintaining material integrity and surface quality.
Processing services Cut-to-length precision services: marine propeller shaft material precisely cut to customer-specified length requirements with optimised end finishing for immediate installation or further processing. Third-party inspection and certification: quality assurance through independent inspection services, mechanical testing and certification to maritime industry standards and classification society requirements. Precision manufacturing standards Standard tolerance specification: all Nauticalloy shafts are manufactured to h8 tolerance unless alternative specifications are agreed, ensuring consistent dimensional accuracy and optimal bearing compatibility across all marine applications.
	Surface quality consistency: rigorous surface quality control throughout the grinding process ensures consistent finish characteristics essential for optimal bearing performance and extended service life. Ready-to-install performance Nauticalloy represents significantly more than standard bright ground bar stock. Each shaft is individually precision ground, straightened and prepared for immediate transformation into precision marine propeller shaft assemblies with minimal additional processing requirements.
Related Pages Product Range Quality Assurance Contact our specialist team at +44 (0)1902 409409 or email [email protected] to discuss your marine propeller shaft requirements.

Millstock Stainless Ltd

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

Phone: +44 (0) 1902 409409

Email: [email protected]