CNC Milling Services UK | Custom Metal Milling

Our CNC milling service is built around accuracy, repeatability, and expert machining of metal and plastic components.

From aluminium and stainless steel to brass, bronze, copper, and engineering plastics, our milling services cover a wide range of materials. With 3-, 4-, and 5 axis CNC machining capabilities, ISO 9001 accreditation, and UK-based expertise, we combine flexibility with proven results. Our approach ensures you receive dependable milling services tailored to your project’s requirements, with clear communication from quote to delivery.

Our CNC milling capabilities

We offer 3-, 4-, and 5 axis CNC machining to accommodate a wide range of geometries and complexities. Our capabilities also include manual milling for simpler parts, as well as prototype and batch production to suit your project’s scale and stage.

Additional services such as design for manufacture (DFM) support, part marking, insert installation, and sub-assembly allow us to support your entire production workflow. A variety of finishing processes are also available to meet specific functional or aesthetic requirements.

We accept 2D files such as PDFs, and work seamlessly with 3D file formats like STEP. From quote to delivery, you receive expert input and clear, responsive communication at every stage.

5 axis CNC machining

Our 5 axis CNC machining service expands the possibilities of precision milling, enabling the production of complex geometries and tight-tolerance parts in a single setup.

Using advanced 5-axis milling centres, we achieve exceptional accuracy, improved surface finishes, and reduced setup time — all critical for maintaining quality and efficiency.

From intricate housings and manifolds to high-performance components in aluminium, stainless steel, and specialist alloys, our 5 axis CNC machining delivers consistent, high-quality results for UK manufacturers who value precision and reliability.

Want 10% off your next order?

From now until October 31st, 2025, we're offering a 10% discount on the first qualifying 5-axis CNC machining order over £2,000.

If your part is suitable for 5-axis milling, now is the perfect time to get in touch!

Request a quote and see if you qualify

Materials we mill

Guidelines for CNC machining

Tab one

Benefit	What It Means for You
Fewer setups, higher accuracy	True 5 axis machining eliminates manual repositioning, improving repeatability and reducing cycle time.
Tight tolerances	Achieve consistent accuracy down to ±0.01 mm, even on complex multi-surface components.
Efficiency & reliability	Advanced programming and in-process verification reduce handling time and minimise errors.
Quality assured	Every component is inspected and certified to ISO 9001:2015 standards before despatch.
Seamless communication	Your dedicated account manager keeps you informed at every stage for full project transparency.

Tab two

Process	Range of Tolerances Achievable	Notes
Milling	>±0.01 mm	Dependent on part geometry, material and setup. 5-axis offers tighter tolerances and better repeatability.
Turning	>±0.01 mm	High-precision turning across billet and bar work, supported by modern multi-axis machines.
Geometric Tolerances	>±0.010 mm*	*Depending on material, finishes, and the geometry of the part.
CMM Measurement	Verification to ±0.002 mm	Achieved using our CNC CMM with 2.3µm volumetric accuracy and temperature compensation.

Tab three

Finishing Process	Purpose	Additional Information
Hard Anodising	Adds a protective oxide layer to aluminium parts.	Usually 25–30 microns thick. Typically used for parts designed for the outdoors and general engineering for corrosion resistance. This finish requires hole masking and machining allowance, so use only if needed.
Sulphuric Anodising	Adds a decorative layer to aluminium.	Less than 5 microns thick. Won’t offer any protection and minimal corrosion resistance. For decorative or aesthetic purposes only.
Bead Blasting	Creates a uniform matte finish that removes tool marks.	Ideal for reducing reflectivity and improving surface uniformity.
Powder Coating	Provides a hard, colourful coating that is tough and wear-resistant.	Commonly used on enclosures, brackets, and consumer-facing components.
Chromate Conversion Plating	Enhances corrosion resistance while retaining electrical conductivity.	Often applied to aluminium components used in electronic assemblies. Commonly referred to as Surtec or Iridite.
Polishing	Achieves a smooth, high-quality surface for aesthetic or functional use.	Used in medical, optical, or high-spec applications where surface finish is critical.
Nickel Plating	Applies a thin layer of nickel to improve corrosion and wear resistance.	Provides a bright, uniform finish. Often used for decorative parts or where moderate hardness and conductivity are needed.
Zinc Plating	Adds a protective zinc layer to prevent rusting, especially on steel parts.	Usually applied with a clear, yellow, or black passivate. Cost-effective option for corrosion resistance in less aggressive environments.
Burnishing	Improves surface finish and work-hardens the material through controlled deformation.	Produces a smooth, polished surface without material removal. Enhances fatigue strength and aesthetic appearance.
Ultrasonic Cleaning	Removes fine particles, oils, and machining residue using high-frequency sound waves.	Commonly used as a pre-finishing or pre-assembly process. Ideal for complex geometries and internal features. Leaves no residue.
Assembly	Combines multiple components into a finished or semi-finished assembly.	Used to streamline production workflows. May include press fitting, fasteners, inserts, or other mechanical joining methods.

Tab four

Process	Maximum Dimensions	Notes
Milling	Up to X: 1000 mm, Y: 600 mm, Z: 550 mm	Based on Doosan and Matsuura 5-axis machines. Max Ø350 mm × 300 mm height for 5-axis work.
Turning	Max billet Ø380 mm × 580 mm length Max bar Ø65 mm × 1100 mm length	Applies across Mazak, Doosan Puma, and CMZ lathes. Includes Y-axis and driven tooling.

Tab five

CNC equipment we use

Matsura MAM72-35V

Automated 5-axis CNC Milling

Max. Work Size: Ø350 mm x H300 mm

Travel X / Y / Z: 550 / 440 / 580 mm

32 pallets, 240 cutting tools

Doosan VC630 5AX

5-axis CNC Mill

X-Axis Travel: 650 mm

Y-Axis Travel: 750 mm

Z-Axis Travel: 500 mm

Doosan DNM 500

5-axis CNC Mill

X-Axis Travel: 1000 mm

Y-Axis Travel: 500 mm

Z-Axis Travel: 500 mm

Doosan DNM4500 4AX

5-axis CNC Mill

X-Axis Travel: 800 mm

Y-Axis Travel: 450 mm

Z-Axis Travel: 510 mm

Bridgeport VMC1000 4AX

4-axis CNC Mill

X-Axis Travel: 1000 mm

Y-Axis Travel: 600 mm

Z-Axis Travel: 600 mm

Bridgeport VMC 760

CNC Mill

X-Axis Travel: 760 mm

Y-Axis Travel: 600 mm

Z-Axis Travel: 480 mm

Bridgeport VMC 600 4AX

CNC Mill

X-Axis Travel: 600 mm

Y-Axis Travel: 400 mm

Z-Axis Travel: 350 mm

Bridgeport XR1000

CNC Mill

X-Axis Travel: 1000 mm

Y-Axis Travel: 600 mm

Z-Axis Travel: 600 mm

Bridgeport VMC 500

CNC Mill

X-Axis Travel: 550 mm

Y-Axis Travel: 350 mm

Z-Axis Travel: 350 mm

Why choose Penta Precision

Make your next move with confidence.

Get a quote today

No fuss. Just clear quotes and quality parts.

Experts with passion

Our team of in-house specialists  bring unparalleled expertise, care and personalised support to every project.  We don’t just deliver parts; we work hard  to bring reliable innovative ideas to  ensure your success.

Exceptional quality, every time

Our commitment to quality drives everything we do. Our thorough  in-house proven process ensures  we deliver high-performing, precision -engineered components that help  your business succeed.

Building effortless partnerships

We work and communicate with you  at every stage - offering design support, bespoke solutions, and opportunities  for improvement to ensure your goals  are achieved, and you feel confident  in your delivery.

What components can we mill?

We can mill parts made from engineering plastics, aluminium, stainless steel, and other metals. Our CNC milling services cover a wide range of components and industries, giving you confidence in your part’s quality and performance.

Here are some examples of component types we regularly mill:

Structural & mounting

These parts play a vital role in mechanical strength, alignment, and mounting points in assemblies.
- Brackets
- Base plates
- Frames
- Pressure Vessels
‍

Housings & protective covers

Components machined to protect sensitive internal systems while maintaining functionality.
- Casings
- Housings
- Enclosures
- Guards

Functional & moving components

Parts are designed for durability, repeatability, and precision in motion-heavy environments.
- Pivots
- Handles
- Latches
- Hooks
- Scraper blades

Thermal & pressure management

These components are milled to exacting standards for sectors where performance and compliance are non-negotiable.
- Heatsinks
- Manifolds
- Flow Plates

Fixtures, tooling, & production support

CNC Milling

Aluminium 6082 T6 with Cerakote coating

What our clients say

Leanne

Senior buyer at bicycle firm

We’ve worked with Penta on several complex projects, and their consistency and attention to detail have been second to none. The team is quick to respond and flexible.

Andrea

Buyer

Penta is highly recommended for their quality, responsiveness and customer service. We have experienced a lot of change with our parts and Penta has always accommodated the adjustments needed in a timely manner. The quality is 100%.

Erjon

Procurement, Surveillance component

Everything about our experience with Penta has been perfect. From the precision of their machines to their outstanding customer service, they’ve exceeded all expectations.

Adrian

Purchasing, Medical

Penta Precision offers a highly professional, competitive and above all quality service. As one of our approved suppliers, we look forward to continuing to benefit from 14 the close and ever-improving relationship.

More about CNC milling

Industry sectors

Learn about the industries  that we work with

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Penta proven process

How we deliver precision engineering every time.

See the process

Video

MTDCNC visits Penta Precision to discuss Matsuura's MAM72-35V

18 Mar 2024

CNC milling service in the UK

Our CNC milling capabilities

5 axis CNC machining

Want 10% off your next order?

Materials we mill

Aluminium

Plastic

Stainless steel

Titanium

Copper

Brass

Bronze

Guidelines for CNC machining

Lead times

CNC tolerances

Finishing processes

Max dimensions

Process

Range of Tolerances Achievable

Notes

CNC equipment we use

Matsura MAM72-35V

Doosan VC630 5AX

Doosan DNM 500

Doosan DNM4500 4AX

Bridgeport VMC1000 4AX

Bridgeport VMC 760

Bridgeport VMC 600 4AX

Bridgeport XR1000

Bridgeport VMC 500

What components can we mill?

Structural & mounting

Housings & protective covers

Functional & moving components

Thermal & pressure management

Fixtures, tooling, & production support

Examples of our high-quality CNC milled components

Sealing die

Space Component - Tray on 3U/6U Satellite

Heatsink

Sensor Block

Bar Seal Die

Brass Block

Milled Aluminium Bracket

Sequencing chamber

Enclosure

Black anodised speaker component

Baffle cage support bracket

Electronic enclosure lid

What our clients say

More about CNC milling

Learn about the industries that we work with

How we deliver precision engineering every time.

MTDCNC visits Penta Precision to discuss Matsuura's MAM72-35V

Common questions

Learn about the industries  that we work with