Resources archive

Guide

Aluminium vs Stainless Steel: Properties, Costs, Machinability

This guide breaks down aluminium vs stainless steel to help you make a confident, cost-effective material choice.

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JOSCAR Certificate

Guide

Titanium vs Stainless Steel: Comparing Performance

This guide will help you compare titanium vs stainless steel in the areas that matter most.

Article

Manufacturing Medical Imaging Parts with CNC Machining

Learn how CNC machining ensures the precision, safety, and consistency required for high-stakes medical imaging components.

Guide

The Complete Guide to CAD Machining for CNC Projects

This guide will help you get the most out of CAD machining, making your CNC projects smoother and more successful.

Video

Penta Precision's 3 Uniques

Article

On-Time Delivery and What Affects It

In this article, we share the practical, proven measures we take to help procurement teams like yours get the components they need, exactly when they need them.

Article

Chamfer vs. Bevel: Which One Is Best for Your Machined Parts

Whether you’re working on aerospace components, medical devices or industrial parts, knowing when to use a chamfer vs bevel edge can streamline production and improve part quality.

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Specifying CNC machining: Changing supplier guide

Article

Chamfers in Manufacturing: Design, Material, and Cost Considerations

In this guide, you’ll learn what a chamfer is, how it differs from other edge types, and why it matters in CNC manufacturing.

Article

Fillet vs Chamfer: Choosing the Right Edge for Your Machined Parts

We’ll explore the differences between chamfered and filleted edges and when to use each.

Guide

Quality Control in CNC Machining: Inside Penta Precision's Proven Process

In this blog, we offer insights into why our customers place their confidence in us for critical projects.

Guide

Which manufacturing method is best for enclosures?

Article

CNC turning 101: Overview of the CNC turning process

CNC turning is a widely used manufacturing process that creates precise cylindrical parts. This computer-controlled process delivers exceptional accuracy, speed, and repeatability. If you're looking to produce precision components with efficiency, CNC turning is a key solution. In this guide, you'll learn what CNC turning is, how it works, and what machines and materials are involved.

Article

Material testing in CNC machining: How to choose the right metal

Choosing the right metal for CNC machining isn't just a design decision; it has a direct impact on performance, reliability, and cost. When a part fails or wears out too quickly, the root cause is often the material. That's why material testing is such a critical step in the process. We'll explore what to consider when selecting metals for CNC machining, and how testing helps verify that choice.

Article

CNC milling 101: An introduction to the CNC milling process

CNC milling has become a cornerstone of modern manufacturing. It plays a crucial role in producing precision components for industries like aerospace, medical, and defence. If you're sourcing parts that need to be exact, fast, and reliable, this is a process worth knowing. You'll discover what the CNC milling process involves, how different machines and operations are used, and what steps are needed to get started.

Article

Hardness testing for material selection

Choosing the wrong material can lead to costly failures, production delays, and unreliable parts. Hardness testing helps you avoid these issues by showing how materials respond to pressure, wear, and force. It provides the data you need to make confident and cost-effective decisions. This guide covers the most widely used hardness testing methods, including Rockwell, Brinell, Vickers, Knoop, and Shore.

Article

Best corrosion-resistant materials for CNC machined parts

When your components are exposed to moisture, chemicals, or saltwater, choosing corrosion-resistant materials is key to ensuring long-term reliability. Selecting the right corrosion-resistant metal helps protect both performance and your bottom line. This guide explores the best corrosion-resistant materials for CNC machining in harsh environments. You'll learn which corrosion-resistant metals offer the most durability, and when each is the most suitable.

Article

Tapped hole vs threaded hole: Comparing methods

Threaded holes are a small but essential detail in CNC part design. If they're not specified correctly, they can lead to fit issues, tool breakage, or even part failure during assembly. You'll learn how each threading method works, when to use them, and how to avoid common pitfalls. We'll also touch on materials, tooling limitations, and how to clearly communicate your thread specs. Whether you're prototyping or placing a production order, this guide helps you get threads right the first time.

Article

CNC machining thread pitch chart

Thread pitch might seem like a small detail, but getting it wrong can cause serious issues, misaligned parts, poor fits, or even mechanical failure. If you're designing or sourcing precision-machined components, knowing how pitch works is essential for ensuring proper fit and function. This guide is here to walk you through everything you need to know.

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Penta Precision ISO 9001:2015 British Assessment Bureau certificate

Article

Additive vs. subtractive manufacturing: Key differences and use cases

Additive and subtractive manufacturing are two of the most important methods used to create parts today. As technology advances, more businesses are comparing these approaches to find the best fit for their projects. The choice you make can influence your lead times, costs, and design flexibility. In this guide, you'll learn how these manufacturing methods differ and when to use each one.

Article

JIT production 101: How just-in-time manufacturing works

Just-in-time manufacturing (JIT) has reshaped how you manage production and inventory in today's fast-moving industries. By focusing only on producing what is needed, when it's needed, you avoid overproduction and save valuable resources. This lean, agile approach helps improve efficiency across your entire operation.

Article

Green machining: How CNC manufacturing impacts sustainability

Environmental responsibility is becoming a key consideration in modern manufacturing. Green machining offers a smarter, more sustainable way to produce high-precision components without compromising on quality or performance. As industries adapt to changing expectations, sustainable machining is becoming essential for staying competitive and future-ready.

Article

Understanding unilateral tolerance vs bilateral tolerance

Tolerancing errors are one of the most common reasons for quality issues in manufacturing. In CNC machining, even small tolerance mistakes can lead to part failures, rework, or costly delays. If you work with CNC-machined components, understanding how different types of tolerance work could save you both time and money.

Article

The role of CMM in CNC quality control

Quality issues in manufacturing often come down to one thing: precision. When you're producing high-spec components for aerospace, medical, or defence industries, even the smallest deviation can create major problems. That's why more manufacturers are turning to Coordinate Measuring Machines (CMMs) to keep their quality consistent and their processes reliable.

Article

Hard metal vs. soft metal machining: Choosing the right approach

Material selection plays a critical role in the success of any machining project. Choosing between hard and soft metal machining can significantly impact your production time, overall cost, and the quality of your final part. Each approach has its own strengths, limitations, and ideal use cases.

Guide

How to cut costs on machined components

Guide

CNC machining guide: Process & materials

Article

A practical guide to geometric dimensioning and tolerancing

Geometric dimensioning and tolerancing (GD&T) helps eliminate confusion by providing a shared engineering language. It clearly defines how parts should look, fit and function across every stage of production. If you're involved in designing, machining or inspecting parts, understanding GD&T is crucial.

Article

Penta Precision announces acquisition of RDSW Limited trading as RDF Precision

Penta Precision is pleased to announce the acquisition of RDSW Limited Trading as RDF Precision. This partnership strengthens Penta Precision's CNC turning capabilities and marks an exciting new chapter for both companies.

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Penta machining drawing checklist

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Penta Precision 2025 Brochure

Article

The sweet spot or radical-centre of CNC machining, automation and lean

Automation and lean manufacturing don't have to be opposing forces—when combined through palletisation, they unlock new levels of CNC machining efficiency, minimising downtime and driving precision without compromise.

Article

Machining design tips for marine technology components

Components for ocean technology applications need to meet two major criteria. How can you ensure your design will meet these criteria? Read more in this blog.

Article

Acetal vs Delrin: What's the difference

What's the difference between Acetal and Delrin? A question we often get asked here at Penta Precision. In this blog we're explain the operational differences, how to choose between them and see our handy side by side comparison table.

Article

What's the difference between 3-axis, 4-axis, and 5-axis milling?

With options like 3-axis, 4-axis, and 5-axis milling, it's easy to feel overwhelmed by the technical jargon. In this blog, our Milling Team Leader David demystifies these terms, and reveals the advantanges and disadvantages of each.

Article

Machining components for flow measurement equipment

Fluid control components must meet stringent requirements to ensure the final product operates consistently and effectively. This blog covers the machining requirements for these specialist parts and what it takes to achieve them.

Article

The truth about CNC machining: Myths vs. reality

With so many misconceptions about CNC machining floating around, we thought we'd set the record straight.

Article

Machining for space applications

Satellites, and all components that are destined for space travel, experience a unique set of conditions that necessitate careful design and manufacture.

Article

Balancing aesthetic and functional design in CNC machined components: A guide

Aesthetics vs functionality…the ongoing conflict in the minds of product designers and engineers. In this blog we consider both Aethetic and Functional component design, how you can balance the two and consider some common trade-offs.

Article

Delivery for machined components: Penta Precision's process

As consumers, we've been conditioned to expect free delivery as standard (thanks Amazon!) and as a result, we often find it hard to accept delivery charges from smaller companies. But do you really want a poorly-paid courier to throw your machined parts on your doorstep? Probably not. So what do you get for your delivery charge?

Article

Selecting an aluminium alloy

Selecting the appropriate material and grade is among the important early decisions you'll make when designing your CNC machined component. In this blog we look at the most common grades of aluminium, one of the most versatile metals, and the factors to consider to select the best grade for your next project.

Article

Quality assurance in CNC machining: A guide for purchasing managers

Exceptional quality isn't just a 'nice to have'. As a buyer, you rely on quality components for the reliability, consistency and performance of your product. In this blog we take a look at what good quality assurance looks like, so you can make sure you choose a supplier who will deliver the quality you need.

Article

Understanding manufacturing lead times: How to get your CNC machined parts faster

Discover essential tips for optimising lead times in precision machining, including effective design practices and alternative buying methods. Learn how Penta Precision can streamline your CNC machining projects for faster delivery and improved efficiency.

Article

Should I choose one supplier for machining and assembly?

Sometimes, managing small assemblies of machined components is a real time drain, right when you want to be getting a product ready for sale. Maybe there's a better way?

Article

Hard anodising vs. sulphuric acid anodising for CNC machined components

Among the various types of anodising processes, two prominent methods stand out: Hard Anodising and Sulphuric Acid Anodising. In this blog, we delve into the distinctions of each of these finishing processes, comparing their benefits, common applications, and suitability for CNC machined components.

Video

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

Article

How much does CNC machining cost?

As a buyer of machined components, cost is probably never far from your mind. In this blog, we break down what a CNC machining quote should cover to help you compare quotes between suppliers in the UK.

Article

3 design considerations for cylindrical components

There are some design considerations that are specific to cylindrical components that make the machining process easier, and therefore, save money. This blog outlines the top three.

Article

Tips for higher quality from CNC machining providers

Quality. Everyone wants it but not everyone is getting it. Here we take you through the main things to look for and questions to ask prospective machining suppliers when it comes to quality.

Article

Mastering plating in CNC machining

Have you ever marvelled at the sleek finish on your favourite gadgets? This level of finish is achieved from a process that is part science, part artistry. We're talking about plating. In this blog, we take you through what plating actually is, why you might choose plating, the factors that affect the final plating finish, and how you can allow for plating at design stage.

Article

Copper vs brass: Which is the best material for your next machined component?

Copper or brass? Brass or copper? If you're in a quandary about which of these two yellow metals to choose for your CNC machined component, you're not alone. In this blog we bring you the lowdown on these two excellent options and will help you compare them side by side.

Article

5 crucial considerations for surface finishing in CNC machining

Delve into the essentials of surface finishing and explore the five key factors every specifier and engineer should consider when deciding on the appropriate surface finish for their CNC machined part.

Article

The advantage of reshoring: 4 reasons to bring your manufacturing back home

Reshoring is becoming increasingly common. There are lots of benefits to moving your production back to the UK. Take a look at our top four reasons to reshore the manufacture of your precision machined components.

Article

2023 - A year in review

From the arrival or 17 new team members, investment in 2 new machines for our workshop to being shortlisted for 2 business awards and climbing to the summit of Pen Y Fan - it's been some year! Our latest blog reflects on a busy and productive 2023 for the Penta team.

Guide

Custom enclosures: from design to manufacture

Article

Unlock cost-effective precision machining

If you're trying to get a component within a specific budget, consistently getting quotes that are just too high is going to cause you problems. Here are a few tips on how to optimise your design and get your component in budget.

Article

Need a new set of threads? Specifying threads for CNC machining

Delve deep into the art of threads design, manufacturing, and more. In this blog we explore in detail how to select and specify threads for CNC machining as well as draw your attention to key design considerations. We also take you through how Penta machine threads to give you more background for your design.

Article

Is your supplier ghosting you? How to improve supplier communication

It's all too common. At the start of a relationship, everything's rosy. But then you take the next step... and bam. You've been ghosted. What next? In this blog, we take you through what might be a familiar situation when it comes to communication from your CNC machining supplier, what the horrifying cost of that might be, and how you can improve communication with your existing or new supplier.

Article

Has pre-production exposed hidden problems? Solve your CNC prototyping challenges

CNC prototyping is an essential step in bringing your product to life. It lets you see how your design performs in the real world and identify issues early. However, turning that prototype into a production-ready part can be tougher than you think.

Guide

How to design a waterproof enclosure for machining

Article

Design for manufacturability (DFM) - Why collaboration is crucial

From cost-efficiency to tight schedules, quality demands, and specific application requirements - there are so many factors to consider and balance during the component design phase. In this blog, we dive into the world of Design for Manufacturability (DFM) – a critical early-stage process in production development that can make or break your project's success.

Article

Future-proof supply chain: 3 key strategies

When the economic backdrop is challenging, taking steps to secure your supply chain is one way to feel more in control. Director Mark Walker shares three top tips for securing your supply chain when sourcing CNC machined parts.

Article

Why tolerance matters: The why and how of specifying tolerances for CNC machining

In the world of CNC machining, precision is paramount. One key aspect of achieving precision is specifying tolerances. Tolerances define the allowable variation in dimensions for a given part. In this blog post, we will explore what tolerances are, why they matter in CNC machining and how to effectively specify them for optimal results.

Article

Electronic enclosure design for machining

Designing an electronic enclosure isn't always straightforward, and keeping costs down can be crucial for making the end product financially viable. From material choice to surface finish, there are decisions made across the whole manufacturing process where you may be adding unnecessary costs.

Article

The limitations of data sheets for CNC machined component design

When it comes to CNC machining, data sheets are often relied upon by designers to guide their decision-making process. However, they do have their limitations in the context of CNC component design. Learn about these limitations and how to overcome them.

Article

Why is my CNC machining supplier less helpful now?

Exploring some common issues that may have arisen with your once reliable, existing CNC machining supplier. From quality and consistency concerns to communication gaps and inflexible approaches, we shed light on the signs that indicate it might be time to consider a new supplier. We delve into the reasons behind these frustrations and help you navigate the process of finding a more reliable CNC machining partner.

Video

Using a mill turn machine

Article

Precision machining quality issues: A checklist for success

If your machined components arrive with quality issues, this may not be simply a problem with your supplier producing components to drawing. In reality, quality issues are a symptom of a bigger problem. Find out why this occurs and ensure it doesn't happen in the future.

Video

A look inside the Matsuura MAM 72 35V - automated and unmanned 5 axis CNC machine

Video

Manufacturing an enclosure using a pyramid fixture on a 5-axis CNC machine

Article

The price of precision: 5 factors that influence CNC machining costs

Under pressure to cut spending? Struggling to maintain quality standards? The increase in raw material and energy costs is pushing up the price of CNC machining, but knowing what other aspects of your project will affect price can help you to keep costs down.

Article

How to design a heatsink for manufacture

If you're designing an electronic product, particularly one with a plastic housing, there's a good chance you'll need a heatsink. This blog will take you through the key design considerations to achieve the best efficiency and value for money.

Article

2022 - A year in review

2022 was a big year for Penta: our first full year in our new premises, new team members, new machines and new customers, all while continuing to deliver the exemplary service that we have become known for.

Article

What to know before buying machined components

You place a lot of trust in your suppliers, and usually there is a lot riding on everything going as expected. Here's our spooky take on breakdowns that can happen in that relationship.

Article

Penta wins business growth award

We are over the moon to have been awarded the Business Growth Award 2022 at the Central South Business Awards. The award recognises outstanding vision and leadership through significant and sustained growth.

Article

Is the cost of your machined components increasing?

If you outsource CNC machining, you are probably seeing component prices rise. For buyers that are focussed on getting best value for money, an environment where prices are rocketing can make your job very hard indeed.

Article

2021 - A year in review

2021 has marked a year of change at Penta. From new employees to new locations, our focus for the year has been the same as ever – providing an exemplary service for customers.

Article

How to beat the rise in raw material prices

Engineering raw material prices have rocketed and it's causing chaos. Uncertainty over availability means it's difficult to get quotes for materials, and difficult to get quotes for manufacturing. The timeframe in which a quote remains valid is shortening significantly. We're feeling the effects, and we know our customers are too.

Article

Are badly specified engineering tolerances pushing up your costs?

It can be a tricky balancing act to specify components in industries where there is a need for volume but also for safety, competition is high, or the market is commoditised. Designers and product development teams facing these challenges understand that precision machining tolerances must be detailed. And the datum must be precise. If they get any of this wrong, they risk compromising the product's fit, form and function.

Article

Specifying the right aluminium grade and plastic type for medical devices

You love the brushed aluminium finish on your top-of-the-range designer laptop. And you want the same finish for the high-end medical device you're specifying. But this may not be as easy as you think. The aluminium grade you want may not be readily available. Or the finishing may require special techniques.

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Stainless Steel: Tables of technical properties

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International alloy designations and chemical composition limits for wrought aluminum and wrought aluminum alloys

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Why make it in brass

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Machining of aluminum and aluminum alloys (ASM handbook)

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General tolerances – DIN ISO 2768

Article

Who's at fault? Your CNC machining supplier or your drawings?

You're having difficulties with a precision component for a critical medical device. The part won't fit the assembly. Or the finish isn't right. Or the quality/consistency is hit and miss. Or any number of other issues. But your existing supplier – who perhaps has been reliable up until now – is pushing back: they did "exactly as instructed", they protest. They followed your drawings/CAD models "to the letter". So what went wrong? And how can it be fixed quickly and cost-effectively? You want a second opinion – is the issue with the supplier, the drawings or both?

Article

3 vital questions to ask your medical machining suppliers

Procuring subcontract precision engineering for medical device components can be a minefield. Sourcing the right fit for your supply chain is far from easy because of the sheer number of players out there. Many claim to be specialists in their own particular sphere of CNC machining (while still taking on plenty of non-core work). And you will know from experience that some precision engineers are more precise than others.

Article

How to shortlist your new CNC machining suppliers

You're not happy with your existing CNC machining suppliers. You're seeing warning signs relating to quality, SLA breaches and late deliveries. That's never good – particularly for critical sectors such as medical or aerospace.

Article

Four more reasons to change your CNC machining suppliers

Quality issues and inconsistency… failure to meet SLAs… wrong skill set… late deliveries. These are four of the biggest issues involving suppliers. They make procuring CNC machining challenging and stressful. They waste time and money. But they're not the only reasons to change supplier. Here are four more…

Article

4 reasons to change your CNC machining suppliers

If you're unhappy with your CNC machining supplier(s) then you don't need anyone to tell you it's time to look at other options. But if the jury is still out, this blog post (and free guide) will help you to review your options and decide on the best course of action. Here are the four most common reasons that procurement professionals – either buyers or specifiers – contact us because they're unhappy with their existing machining suppliers…

Article

Specifying aluminium machining for medical applications

Aluminium is not like stainless steel: there is no one 'stand out' grade that is the first choice for medical devices. There is no '316L' of aluminium. Instead, as a purchaser of medical component machining solutions, you are confronted with a plethora of aluminium grades – any, all or none of which may suit your specific medical application. To suggest that's a challenge is an understatement. But it also offers you a great opportunity to improve quality, consistency and savings. How so? Simply this… you won't be on '316L autopilot' as sometimes occurs in the world of stainless steel medical components.

Case study

Expanding expertise: Successful collaboration leads to long-term success in medical equipment manufacturing

A strategic partnership enabled a leading UK battery solutions provider to secure and grow a long-term contract in the medical equipment industry by expanding its manufacturing capabilities.

Article

Specifying 316L and other medical-grade stainless steel

316L is usually the first choice for medical manufacturing but it is not the only stainless steel that is available for healthcare applications. Other grades of medical stainless steel may be better suited for your purposes and/or more cost effective. But let's start with 316L. Here is why it is the 'go-to' stainless steel for most medical applications…

Case study

Aluminium tooling plate machining

Penta helps with an urgent request for a nozzle clamp to be manufactured in aluminium tooling plate for a manufacturer of food processing and packaging machinery systems for international, blue chip organisations.

Article

Medical plastics machining: Guide to choosing the right types

Plastics can be harder to machine than metals: they can be less forgiving. Machining plastics requires specialist expertise – the kind that comes only with years of experience. But that's just half the battle. Not every plastics machining specialist has the experience needed to meet the stringent requirements of medical equipment OEMs. Choosing the right machining partner for medical applications is vital to ensure quality, consistency, validated processes and traceability of materials.

Article

Five hidden costs you must eliminate from your medical manufacturing

Medical devices are critical products: lives depend on them. Your company's life-saving products rely on the quality of the components you specify and the validated processes of the suppliers you appoint. Consistency of quality is crucial. Your suppliers must maintain that quality while hitting production deadlines with unerring precision. But you and your team are still under huge pressure to keep costs down; it can feel like a never-ending conflict of priorities. And yet many of those costs should never be there in the first place.

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Understanding the debate on plastic – British Plastics Federation

Case study

Accelerating success: How Penta delivered precision motorsport components in record time

Penta's aluminium and plastic machining capabilities helped relieve the project strains of a fast moving motorsports manufacturer in the UK by providing parts at short notice and exact to specification.