Precision CNC Machining Services UK
Sterling ITI provides precision CNC turning and milling services for prototype, one-off and production components manufactured to your exact specifications. From simple machined parts to complex precision-engineered components, we deliver the accuracy, repeatability and quality demanded by OEMs, manufacturers and industrial engineers across the UK.
Our CNC machining facility works with a wide range of materials, including stainless steel, aluminium, mild steel, brass, bronze and engineering plastics such as Acetal, Nylon and PTFE. Whether you require a single prototype, low-volume batches or ongoing production, our experienced engineers deliver precision-machined components with competitive lead times and consistent quality.
Our machining expertise is built on decades of engineering experience, with a heritage dating back to 1978 through the Sella Askus brand. Today, that knowledge continues within Sterling ITI, combining established manufacturing expertise with modern CNC technology to produce high-quality components for customers across a wide range of industries.

CNC Turning Services
Sterling ITI offers comprehensive CNC turning services for the manufacture of precision cylindrical and rotational components. Our CNC lathes are capable of producing:
- Shafts
- Bushes
- Adaptors
- Fittings
- Spacers
- Threaded components
- Instrumentation fittings
- Custom-engineered parts
Whether producing a single bespoke component or a repeat production run, our CNC turning processes ensure consistent quality and dimensional accuracy.
CNC Milling Services
Our CNC milling capabilities enable the production of complex components with exceptional accuracy and repeatability. Using advanced CNC machining centres, we manufacture precision parts featuring:
- Complex geometries
- Precision holes and threads
- Slots and keyways
- Surface profiling
- Multi-face machining
- Tight tolerance features
CNC milling is suitable for producing both simple and highly complex components used in industrial machinery, automation systems, instrumentation, food processing equipment, energy systems and specialist engineering applications.


Why Choose Sterling ITI for CNC Machining?
Customers choose Sterling ITI because we combine almost five decades of precision engineering expertise with responsive customer service. Our CNC machining heritage dates back to 1978 through the Sella Askus Engineering brand, giving customers the confidence of working with an experienced UK manufacturer.
- UK manufacturing facilities
- CNC milling and turning expertise
- Prototype to production capability
- Fast quotation turnaround
- Competitive pricing
- Experienced engineering team
- Nationwide service
Our goal is to provide machining solutions that help customers reduce lead times, improve product quality and maintain reliable supply chains.
CNC Machining FAQs
Sterling ITI provides a range of precision CNC machining services designed to produce high-accuracy components for industrial and engineering applications. Services include CNC milling, CNC turning, drilling and the manufacture of complex custom parts. Using advanced CNC equipment and skilled engineers, components can be produced to tight tolerances and consistent quality. Whether you require prototype development, small batch production or larger manufacturing runs, CNC machining ensures repeatable precision and reliable results.
CNC machining can be used to manufacture components from a wide variety of metals and engineering plastics. Common materials include aluminium, stainless steel, mild steel, brass and copper, as well as plastics such as nylon, acetal and other durable polymers. The choice of material depends on the mechanical strength, corrosion resistance and performance requirements of the finished component. CNC machining provides excellent accuracy across these materials, making it suitable for demanding engineering and industrial applications.
Yes, CNC machining is ideal for producing custom components, including one-off parts, prototypes and full production runs. Parts can be manufactured from customer-supplied drawings, CAD files or technical specifications to ensure they meet precise requirements. This flexibility allows engineers and designers to test prototypes before committing to larger manufacturing volumes. CNC machining also ensures consistent quality across repeat orders, making it suitable for both development projects and ongoing component supply.
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