Grainger & Worrall

Grainger & Worrall The world’s leading total castings solutions provider, supporting the automotive, EV, motorsport and aerospace sectors. And they give us part of our DNA.

Remaining true to a core philosophy of absolute customer service, while expanding our offer as technology allows, Grainger and Worrall is at the global forefront of castings development and innovation. The world is demanding ever-lighter, ever-more efficient means of propulsion and at Grainger & Worrall, we are helping to drive that trend. However, we are only able to because of almost three-quart

ers of a century of accrued know-how. No other castings organisation has the same resources or history of delivery. Some will know of us as a foundry – and that’s only part of the story. We are extremely proud of our history and it is that track record that gives us the foundations of our contemporary solutions. Those intricate layers of experience provide us with an unrivalled understanding of geometry, tooling and pattern-making. The other element of our outlook is an utter focus on the needs of the client and an ability to rise to a challenge – any challenge that will see us delivering imaginative and ground-breaking programmes. We are privileged to have world-class customers, and organisations that lead the world in their respective spheres – and we continue to deliver innovation to help them stay there. Our services encompass up-front engineering, precision machining and consultancy that is in your language and backed by real science, right from the very early stages of the supply and development chain. By making our own tooling and both understanding and embracing cutting edge rapid prototyping technologies we take your concept through to production and we’re quick and dynamic because of our experience. We are very open-minded to change – market change, regulation change, fundamental energy change. In many respects, we think we’re unique, underpinned by an underlying ethos of humility and respect, for our clients, our employees and our suppliers. Yet that does not compromise on an insatiable desire to keep delivering ground-breaking innovation to our client base now, and in the future.

One thing that doesn’t get talked about enough in prototype casting development: the cost of the iteration gap.Not the c...
10/06/2026

One thing that doesn’t get talked about enough in prototype casting development: the cost of the iteration gap.

Not the cost of a design change itself. The gap between the change being approved and the next physical part landing on the inspection table. In traditional sand casting, that gap is long. You’re waiting on a pattern shop. Sometimes an external one. The tooling has to be modified, re-machined or remade. Until it’s back, the programme is effectively paused, even if nobody says so out loud.

Digital Sand Printing removes that dependency. Instead of modifying hard tooling, you update the CAD and reprint the sand mould directly. The tool is the file. Change the file, change the mould.

What that means in practice: a design revision that would have cost you two to three weeks of programme time now costs you a day or two of print time. The physical iteration cycle compresses to match the pace of the engineering conversation rather than the pace of a supplier’s workshop queue.

It’s not universally understood that DSP isn’t just for complex geometry. Its bigger value in a live development programme is responsiveness. You can run multiple design variants in parallel, cast them in the same pour window and get comparative physical data far earlier in the process than conventional tooling schedules allow.

The programmes that get into trouble aren’t usually the ones with the hardest geometry. They’re the ones where the iteration loop gets stretched because the manufacturing step can’t keep up with the engineering step.

Worth thinking about when you’re scoping your next prototype phase.

From concept to reality is a straightforward phrase. The engineering between those two points rarely is. Complex geometr...
02/06/2026

From concept to reality is a straightforward phrase. The engineering between those two points rarely is.

Complex geometries, tight tolerances, programmes under time pressure. The path from a CAD file to a qualified casting involves a lot of decisions that determine whether you get there cleanly or not.

A defence transmission casting had a 50% reject rate for a decade with an incumbent supplier. The geometry was understood. The development model was the problem. We solved it in nine months with seven iterative cycles and first-attempt qualification.

That kind of outcome isn’t about having better equipment. It’s about how you approach the engineering from the start.

We work with customers from the earliest stages of design, through simulation, development and into production. The earlier we’re involved, the better the result.

If you’re at the concept stage or stuck somewhere between concept and reality, let’s talk.

https://gwcast.com/contact/

- A 50% scrap rate. Ten years unsolved. Nine months to fix it.- 45-piece multi-core assembly- Seven development cycles- ...
27/05/2026

- A 50% scrap rate. Ten years unsolved. Nine months to fix it.
- 45-piece multi-core assembly
- Seven development cycles
- First-attempt military-grade qualification

Some problems persist not because they’re impossible, but because the development model used to solve them is wrong.

A defence programme came to us with a mission-critical transmission casting rejecting half of every production run for a decade. Root causes were known: core positioning errors across a 45-piece sand core assembly, dimensional drift beyond inspection tolerance and sealing defects with no rework possible after machining. Ten years of conventional casting development hadn’t changed that.

Nine months to qualification, against a typical 18-27 month industry standard, meant it wouldn’t get the chance to try again.

We abandoned the sequential development model entirely. It was the only way.

Simulation, physical sampling, destructive testing and model feedback ran in parallel from day one. 24-hour simulation turnaround per iteration. Physical mould packs were produced earlier than industry convention, accepting the cost to compress the learning curve. Every casting underwent X-ray, CT scanning and tensile testing immediately, findings fed directly back into the model. Seven complete development cycles in nine months. The industry manages one or two in twice the time.

By cycle seven, simulation predictions and physical results were in full agreement.

First qualification attempt. 40-hour endurance test. Full strip-down inspection. No defects. Near-zero scrap.
This wasn’t a faster version of the existing process. It was a different methodology, proven under real programme pressure.

Read the full technical breakdown, including how the hybrid methodology works and why it’s repeatable: https://gwcast.com/military-grade-defence-transmission-casting-delivered-three-times-faster-than-industry-standard/

When timelines tighten, pressure shows up quickly.NPI cycles are shorter. Test dates are fixed. Designs still need provi...
15/05/2026

When timelines tighten, pressure shows up quickly.

NPI cycles are shorter. Test dates are fixed. Designs still need proving out. In that environment, delays don’t just slow programmes down, they threaten them.

At Grainger and Worrall, we support teams that need to move quickly without compromising confidence in the result.

Fit-for-purpose prototypes for early testing. Production-representative castings for final validation.

When a programme is under pressure, you need more than a supplier who can quote fast. You need a casting partner who understands the engineering, moves when you need to move and delivers parts you can trust.

Find out how we support rapid prototyping programmes: https://gwcast.com/urgent-casting-programmes/

Everyone’s talking about AI. Fewer people are talking about what powers it.Behind every data centre is a vast energy inf...
12/05/2026

Everyone’s talking about AI. Fewer people are talking about what powers it.

Behind every data centre is a vast energy infrastructure including gas turbines, industrial generators and systems that rely on structurally critical aluminium components performing exactly as intended.

That’s where we come in.

At Grainger and Worrall, we produce complex cast components for power generation: large-diameter housings, structural casings and parts where internal integrity matters as much as what’s on the surface.

These are not simple castings. They require simulation, process control and decades of learning in applications where the margin for error is defined in microns, not assumptions.

Demand for AI is accelerating. The infrastructure beneath it has to keep up. Behind every data centre is a casting specification that cannot be compromised.

Explore our power generation work: https://gwcast.com/sector/power-gen/

Metrology at Grainger & Worrall isn’t just an end-of-line check; it’s integrated throughout every stage of casting and m...
08/05/2026

Metrology at Grainger & Worrall isn’t just an end-of-line check; it’s integrated throughout every stage of casting and machining.

On-site, we operate 8 CMMs, 4 laser scanners, 3 Yxlon CT scanners and 2 digital X-ray units with a 125 kg payload. Our laser scanners work in line on the shop floor, feeding dimensional data back into production in real time. This means issues are detected during the process, not after it.

Our CT scanners go even further, generating full 3D volumetric data that reveals the exact position, shape and size of internal features, including porosity, wall thickness, voids and complex geometries, without sectioning or destroying the component.

This data can be directly compared to your CAD model, ensuring conformance to your design intent with evidence, not assumption.

Explore how our metrology capabilities can support your next programme: https://gwcast.com/service/metrology-validation

Speed comes from people, not just systems. That’s why we tailor each project team from day one to fit the unique needs o...
24/04/2026

Speed comes from people, not just systems. That’s why we tailor each project team from day one to fit the unique needs of your project.

With a team of project managers, product engineers, manufacturing engineers, operations and quality. Our engineers own projects end-to-end and are empowered to make decisions without hierarchical delay.

Communication is direct, issues are escalated in real time and problems are solved cross-functionally.

It’s our people who deliver the speed, precision and ownership that keep your projects moving confidently.

Let’s get your project moving: https://gwcast.com/contact/

There’s something powerful about returning to university as a professional.Business Development Director Jay Schofield a...
16/04/2026

There’s something powerful about returning to university as a professional.

Business Development Director Jay Schofield and Production Manager James Seymour did exactly that. Both are Harper Adams University alumni. Both are qualified engineers. Both now in roles that look very different from what they might have imagined on day one of their degree.

What they shared with students wasn’t a job title or a career path. It was something simpler and more valuable: engineering gives you a way of thinking. And that way of thinking works anywhere.

Define the problem. Break it down. Build the solution. It’s a mindset that’s far more transferable than most people realise.

Thanks to Harper Adams University for the invitation. It’s a relationship we value, and one we’re proud to keep investing in.

13/04/2026

With the Artemis II programme redefining what’s possible in space, engineering on Earth has to keep pace.

Grainger & Worrall’s aerospace casting expertise supports the production of lightweight, high-performance aluminium components, designed to meet the extreme demands of flight.

From advanced alloy development to complex, single-piece geometries, every casting is engineered for strength, precision and efficiency.

Because a journey to the skies starts with what you build on the ground: https://gwcast.com/sector/aerospace/

- 16 production‑ready castings in 4 months- First compliant part in 6 weeks- 73% production-ready rate across the entire...
09/04/2026

- 16 production‑ready castings in 4 months
- First compliant part in 6 weeks
- 73% production-ready rate across the entire programme

A casting problem the industry had never solved. A four-month window. We delivered anyway.

A global EV manufacturer needed large structural underbody gigacastings prototyped and delivered before their die casting tooling arrived in June. The component was safety‑critical, thin‑walled, and extremely complex. Every rejected casting reduced their test allocation. The window was closing fast.

Gravity sand casting at the fill speeds required had never been achieved before. Pushing it to those velocities created defect mechanisms nobody in the industry fully understood. Standard digital simulation wasn’t accurate or fast enough. So we threw out the rulebook entirely.

We developed and calibrated some simulation workarounds - an unconventional call that cut iteration times from 175 hours to ~70 without loss of any function. Eight full simulations completed within the window. The defect mechanisms that had wrecked previous programmes were identified and eliminated before a single mould was poured. This enabled fill times 15× faster than the industry standard. 4–5 seconds vs 75+. A speed never reached before in gravity sand casting.

This wasn't a faster version of what already existed. It was a process invented from scratch and proven under pressure. Delivered to meet the tightening timelines of modern development.

Read the full technical breakdown: https://gwcast.com/unprecedented-speed-delivering-a-complex-structural-underbody-gigacasting-for-a-global-ev-manufacture-in-4-months/

Address

Bridgnorth

Opening Hours

Monday 8am - 5:30pm
Tuesday 8am - 5:30pm
Wednesday 8am - 5:30pm
Thursday 8am - 5:30pm
Friday 8am - 5:30pm

Telephone

+441746768250

Website

,

Alerts

Be the first to know and let us send you an email when Grainger & Worrall posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Grainger & Worrall:

Shortcuts

Share

Category