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CNC Machining FAQs
Choosing the right machining partner is an important decision. This FAQ page answers some of the most common questions we receive about CNC sliding head machining, precision turned components, subcontract CNC machining, materials, tolerances and the manufacturing process. If you can't find the information you're looking for, our team will be happy to help.
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CNC sliding head machining is a precision manufacturing process used to produce complex turned components with exceptional accuracy and repeatability. The material is supported close to the cutting tool, making it ideal for producing small, detailed parts with tight tolerances and excellent surface finishes.
Precision turned components are engineered parts manufactured on CNC lathes and sliding head machines to exact dimensions and specifications. They are commonly used in automotive, marine, rail, energy, electronics and industrial manufacturing applications where accuracy and reliability are critical.
Subcontract CNC machining is the process of outsourcing component manufacture to a specialist engineering company. It allows businesses to increase production capacity, access specialist machining expertise and reduce the cost of investing in additional equipment and labour.
We machine a wide range of materials including stainless steel 303 and 316, brass, aluminium, mild steel, acetal, nylon and other engineering plastics. Material selection depends on the component's application, environment and performance requirements.
Yes. We regularly manufacture precision turned components from customer drawings, CAD files, technical specifications and existing samples. Our team can also provide practical manufacturing advice to help optimise component design and production efficiency.
CNC turning rotates the material while cutting tools remove material to create cylindrical or rotationally symmetrical components. CNC milling uses rotating cutting tools to machine features into a stationary workpiece. CNC turning is commonly used for pins, inserts, spacers, fasteners and other precision turned parts.
Tolerance requirements vary depending on the material, component design and application. Using modern CNC sliding head technology, we manufacture components to tight tolerances and work closely with customers to ensure specifications are achieved consistently throughout production.
Yes. We support projects from prototype and pre-production development through to small batch manufacture, scheduled production runs and ongoing subcontract CNC machining. This allows customers to move from concept to production with a single manufacturing partner.
We manufacture a wide range of precision turned components including dowel pins, clevis pins, threaded inserts, spacers, bushes, custom fasteners and bespoke machined parts. Components can be produced to customer drawings or supplied to meet specific application requirements.
To provide an accurate quotation, we typically require a drawing, CAD file or sample component, along with the required material, quantity and any critical tolerances or finishing requirements. Our team will review the information and provide a competitive quotation as quickly as possible.







Join our growing list of happy customers
Don’t just take our word for it—read what our customers say about Bon Precision Engineering. Our reputation and integrity mean everything—and we are proud to have received some great feedback from our customers.
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“I've worked with Bon Precision both commercially and as a boat owning aficionado and can't recommend them highly enough.Their desire to fulfil your every requirement is legendary, complimenting perfectly their refreshingly efficient despatch and delivery times. A joy to do business with.”

"We work with Treehouses, Rope Bridges and rope-work balustrades internationally, as such designing and looking for very specialist production of stainless steel fixings suitable for marine environments. On a search for threaded inserts, we were delighted to discover Bon Precision and on enquiry became very excited that we were dealing with not only a supplier but an expert company who could design, fabricate and test very specialist requirements.We had a huge quantity order for a project in the Middle East, the team at Bon Precision engaged fully and immediately with the project, sent a range of samples and designed a bespoke solution to our specific requirement. Our customers demand world-class quality and certification plus the ability to respond to bespoke and crafted requirements. Our projects worldwide are hugely supported by the first-class service and commitment given by Bon Precision.”

D&M Tech have worked with Bon Precision Engineering on several projects. They have produced a variety of CNC turned components for us, with fast turnaround times and excellent communication. We were particularly impressed when you managed to turn a component to 0.46mm diameter for a complex component. We’ve found Bon Precision Engineering to be very knowledgeable, helpful and easy to work with.

