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• IS09001 2015

 

Advanced CNC Grinding Services for High-Precision Components

At NTG, we specialise in CNC grinding, delivering exceptional accuracy and surface quality for complex components across demanding industries. Using state-of-the-art CNC grinding machines, we provide both external and internal grinding, surface grinding, honing, and thread grinding services. Our investment in advanced machinery ensures that every CNC grinding process achieves the precision, consistency, and efficiency required by modern manufacturing.

With the ability to grind components up to 350mm in diameter and 1500mm in length, and bores up to 600mm in diameter by 150mm long, NTG offers one of the most comprehensive grinding capabilities in the UK. Whether for one-off prototypes, small batches, or high-volume production, our CNC grinding services ensure your parts meet exact specifications every time.

What is CNC Grinding?

CNC grinding is the process of using computer numerical control (CNC) to operate grinding machines with high accuracy. A rotating grinding wheel removes material from a workpiece to create precise shapes, finishes, and tolerances. By automating the process with CNC controls, we can achieve:

• Repeatable accuracy across multiple parts
• Efficient cycle times with reduced manual input
• Complex geometries and contours
• High-quality surface finishes
• Enhanced dimensional stability

The CNC grinding process is essential for industries requiring tight tolerances and smooth finishes, including aerospace, automotive, energy, and medical sectors.

Types of CNC Grinding Offered

External CNC Grinding

We provide external grinding for shafts, pistons, and tooling, accommodating parts up to 350mm in diameter and 1500mm long. External chuck work is carried out on secured workpieces to ensure repeatability and stability during high-tolerance operations.

Internal CNC Grinding

For bores and internal features, we perform internal grinding up to 600mm diameter and 150mm deep. This ensures precise surface finishes and tight tolerances on internal geometries.

Cylindrical Grinding

Cylindrical grinding is one of our core services, ideal for shaping and finishing round components with exceptional precision. It is widely used for aerospace and motorsport components where accuracy is critical.

Surface Grinding

We offer surface grinding for flat surfaces, achieving consistent smoothness and precision across complex parts. This process is essential for parts that demand fine tolerances and surface integrity.

Honing

Our honing capability covers bores up to 100mm in diameter and 100mm long, producing precise surface finishes and geometrical accuracy inside components.

Worm and Thread Grinding

We grind worm shafts and threads up to 150mm in diameter and 750mm long, ensuring high accuracy for transmission and power generation applications.

Universal Grinding and Centreless Grinding

To meet diverse requirements, we also provide universal grinding and centreless grinding, offering maximum flexibility for different geometries and materials.

The CNC Grinding Process

The CNC grinding process involves several stages:

1. Workpiece setup and alignment – ensuring secure mounting to eliminate run-out.
2. Wheel selection – choosing the appropriate grinding wheel based on material, hardness, and desired finish.
3. Parameter setting – feed rate, depth of cut, and wheel speed are programmed for efficiency.
4. Grinding cycle – material is removed with precision under automated control.
5. Inspection and verification – dimensions, tolerances, and surface finish are checked against specifications.

By carefully controlling these steps, we achieve high-quality results across both prototypes and production runs.

Grinding Machines and Technology

Our investment in advanced grinding machines allows us to deliver results that meet the most demanding specifications. Each CNC grinding machine is equipped with digital controls, ensuring accurate programming of the grinding cycle.

Features include:

• Multi-axis capability for complex geometries
• Automatic wheel balancing and dressing systems
• Temperature-controlled environments to minimise distortion
• Automated in-process gauging for dimensional accuracy

While the cost of a CNC grinding machine is a major consideration for manufacturers, NTG’s investment means our clients gain access to advanced technology without the capital expenditure, ensuring maximum value and performance.

Applications of CNC Grinding

We serve a wide variety of industries where precision grinding is critical:

• Automotive and Motorsport – pistons, shafts, and engine components operating at very high RPM.
• Aerospace – turbine shafts, gear components, and precision housings requiring exceptional tolerances.
• Medical Devices – implants, surgical instruments, and components requiring surface integrity and reliability.
• Energy and Power Generation – parts for wind turbines, pumps, and transmission systems.
• General Engineering – tooling, fixtures, and wear-resistant parts for multiple industrial applications.

Materials and Grinding Wheels

A variety of grinding wheels are used depending on the material and surface finish required. Options include:

• Aluminium oxide wheels for steels and general-purpose grinding.
• Silicon carbide wheels for cast iron and non-ferrous metals.
• CBN and diamond wheels for hard materials and high-precision applications.

We carefully manage wheel wear, heat build-up, and cutting conditions to ensure optimal results, smooth surfaces, and consistent quality.

Benefits of CNC Grinding with NTG

• High precision and accuracy – meeting the most demanding tolerances.
• Consistent surface finishes – smooth, high-quality finishes across complex parts.
• Flexibility across materials – capable of grinding both magnetic and non-magnetic materials.
• Cost-effective service – access to advanced equipment without high CNC grinding machine cost.
• Fast turnaround – supporting both urgent prototyping and high-volume production.
• Industry compliance – processes aligned with aerospace, automotive, and medical standards.

Get Started with NTG CNC Grinding

If you require CNC grinding services for high-precision components, NTG is the partner you can trust. With decades of experience, advanced machinery, and proven expertise across multiple industries, we deliver grinding services that combine speed, precision, and quality.

Contact us today to discuss your requirements and request a tailored quote.

Frequently Asked Questions