What Grainger & Worrall does

Grainger & Worrall is a UK-based private aluminium sand casting and precision machining company, operating since 1946 from Bridgnorth, Shropshire, as a subsidiary of the holding company Evolution Castings Group Limited following a 2024 management buyout. The company provides full-process precision casting solutions covering engineering consultancy, materials science, rapid prototyping, casting (gravity, low-pressure, automated series, and gigacasting), 5-axis CNC machining, metrology and NDT validation, and heat treatment, with production ranging from one-off prototypes to annual runs of 20,000+ units and specialised gigacasting capacity for single-piece castings up to approximately 500 kg.

Its underlying technology stack combines in-house 3D sand printing (digital additive sand), Magma casting simulation with proprietary heat-transfer and aluminium material-property data sets, proprietary bespoke aluminium alloys, Cosworth-origin rollover casting techniques, and a validation suite that includes three Yxlon CT scanners, VG Elements software for porosity and wall-thickness analysis, eight CMMs, GOM optical scanning, digital radiography, and AMS2750-certified heat treatment. The company operates six foundries across UK facilities (including the COSCAST site in Worcester acquired in 2017) and a 3,000 m² air-conditioned machining facility at Stanmore Industrial Estate.

Grainger & Worrall sells on a project-based custom-quoting model via direct enterprise sales, with revenue generated through hardware sales of castings and professional services for design, simulation, machining and validation. It serves approximately 999+ customers across 50+ countries in eight sectors: automotive (including ICE, EV and gigacasting work), motorsport (F1-grade and endurance racing), aerospace, defence, power generation, commercial vehicles, marine and architectural. Notable enterprise relationships include Gibson Technology (F1/LMP2), HamiltonJet (marine), Jaguar Land Rover (ALIVE6 engine block with the Advanced Propulsion Centre), Volvo (classic engine recreation), and at least one large EV OEM on gigacasting prototyping. Pricing is not publicly disclosed; the company holds IATF 16949, ISO 9001/14001/45001, JOSCAR, TISAX, Cyber Essentials Plus, and has received four King's/Queen's Awards for Enterprise between 2013 and 2025.

Name

Grainger & Worrall

Legal name

Grainger & Worrall Ltd

Website

https://gwcast.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Grainger & Worrall is a UK private aluminium sand casting and precision machining specialist serving global automotive, motorsport, aerospace and defence OEMs with proprietary alloys, gigacasting prototyping, in-house 5-axis CNC machining and full metrology validation across six foundries.

Ownership category

akta.pro rank

Product category

Aluminium Sand Casting Manufacturing

NAICS

Aluminum Foundries (except Die-Casting) (331524)

akta.pro primary industry

Aluminum Casting & Ingot/Billet/Slab Production (IMAKACAE)

Keywords

• Aluminium sand casting
• Precision CNC machining
• Foundry manufacturing services
• Gigacasting prototyping
• Engineering design services

Headquarters

HQ city

Bridgnorth

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Personnel, Technology or R&D, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Aluminium Sand Casting Manufacturing: Full-process precision casting solutions covering gravity, low-pressure, automated, and gigacasting processes. Revenue from producing complex aluminium sand castings for automotive, motorsport, aerospace, defence, and other demanding industries. Volumes range from 1-off prototypes to series production of 1,000-20,000+ units annually.
2. Precision CNC Machining Services: Advanced CNC machining services including 3-axis to 5-axis precision machining for complex prismatic parts. Services include machining of in-house castings and third-party components, with procurement outsourcing support.
3. Engineering and Design Services: Design For Manufacture (DFM), casting simulation, tooling design and manufacture, project engineering, and technical leadership embedded with customer teams from concept to production.
4. Metrology and Validation Services: Comprehensive inspection and validation services including CT scanning, CMM measurement, GOM optical scanning, digital radiography, leak testing, and tensile testing to guarantee component integrity.
5. Heat Treatment Services: On-site heat treatment facilities including T4, T5, T6, T7 treatments with AMS2750-certified aerospace facility and drop quench technology.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Grainger & Worrall is a specialist aluminium sand casting and precision machining manufacturer that produces complex, high-integrity aluminium castings from 1-off prototypes through to series production volumes for the automotive, motorsport, aerospace, defence, power generation, marine, commercial vehicle and architectural sectors. The company operates 6 foundries across UK facilities (Bridgnorth and Worcester) and offers a full end-to-end service including design for manufacture, casting simulation, tooling design, casting, machining, heat treatment, and non-destructive testing validation.

Product overview

Grainger & Worrall is a full-service aluminium sand casting and precision machining company offering end-to-end solutions from design engineering through to validated cast and machined components. Their portfolio includes core service offerings (Engineering, Material Science, Rapid Prototyping, Casting, Machining, Metrology and NDT Validation) that serve multiple industry sectors (Automotive, Motorsport, Aerospace, Defence, Power Generation, Architectural, Marine, Commercial Vehicles). Their Gigacasting Solutions service enables large, single-piece structural castings for automotive applications, including prototyping support for automotive OEMs transitioning to gigacast-body structures. The company operates automated series foundries alongside their specialist prototyping facilities, providing scalable production from 1-off prototypes through to annual volumes of 90,000 units.

Differentiator

Problem solved

Functional benefit

Products and services

• Engineering Design For Manufacture (DFM) consulting, casting simulation using Magma software, tooling design and manufacture, and project engineering services across multiple demanding industries including automotive, motorsport, aerospace, defence, power generation, marine, infrastructure and commercial vehicles.
• Material Science Development, testing and enhancement of high-performance aluminium casting solutions including proprietary alloys, spectrographic laboratory analysis, and sand testing for silica, Cerebead, Zircon and Bauxite sand systems.
• Rapid Prototyping Accelerated aluminium sand casting prototyping with Fit for Function and Make Like Production (MLP) options, enabling validation of designs before full-scale production commitment.
• Casting Complex aluminium sand casting services including gravity casting, low-pressure casting with rollover process, automated series foundry casting, and Gigacasting for large structural components up to approximately 500 kg single-piece weight.
• Machining Advanced CNC precision machining including 3-axis to 5-axis machining centres, with a 3,000m² air-conditioned facility for complex prismatic precision machining worldwide.
• Metrology and NDT Validation Dimensional accuracy verification and non-destructive testing including 8 Coordinate Measuring Machines (CMMs), 3 Yxlon CT scanners, 3D laser scanners, and endoscopic inspection for casting integrity validation.
• Gigacasting Solutions Specialist prototyping service for large, single-piece structural castings (gigacastings) enabling automotive OEMs to prototype front and rear underbody structures before committing to high-pressure die-casting production.
• Advanced Engineering Solutions Specialist engineering services including reversed engineered tooling, material analysis spectrometers, computer tomography validation, digital radiography, GOM optical scanning, leak testing, and tensile testing.
• Material Science Solutions Mechanical testing, heat treatment (T4, T5, T6, T7), AMS2750-certified aerospace facility, metallurgical testing, and support for 300 Series (356, 357, 354, 355) and 200 Series (201, 206, L119/RR350) aluminium alloys.
• Complex Machining Solutions High-spec CNC machining with up to 24-station Flexible Manufacturing Systems (FMS), procurement outsourcing support, and capability for engine blocks, cylinder heads, battery trays, electric drive units, and structural parts.

Quantifiable outcome

• Rapid prototyping in days rather than weeks through in-house DSP, tooling, DFM, casting and machining
• +4 more outcomes

Named customers5 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core and flagship.

• Evolution Castings Group LimitedcoreOthersParent company and umbrella organisation created through a management buyout. Grainger & Worrall is a limited company and subsidiary of Evolution Castings Group Limited. The MBO transitioned ownership from Vernon Grainger's grandsons to current management.
• Gibson TechnologyflagshipStrategic or Co-development PartnerLong-standing collaboration delivering reliable, F1-grade cast Gibson engines. Gibson GK428 engines cast by Grainger & Worrall were used by all 20 cars on the LMP2 grid. Engineers from both businesses collaborate closely to deliver accurate, high-integrity engines.
• HamiltonJetcoreStrategic or Co-development PartnerPartnership on HTX30 Waterjet production. Reduced lead times, hydrodynamic research, shorter product delivery times and innovative sand casting were key components. First set of six production waterjets produced successfully.
• Jaguar Land Rover (JLR)coreStrategic or Co-development PartnerALIVE6 engine block development project in conjunction with Advanced Propulsion Centre (APC). Grainger & Worrall developed casting process and supply chain supporting plasma-coated cylinder block technology that reduces engine weight and size.
• Advanced Propulsion Centre (APC)coreStrategic or Co-development PartnerGovernment-backed innovation organisation co-funding and supporting the ALIVE6 engine block development project with Grainger & Worrall and Jaguar Land Rover.

Scale indicators9 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Aeromet International: UK-based aluminium foundry focused on aerospace and defence castings. Highly comparable to Grainger & Worrall in terms of UK aluminium sand-casting capability, premium/regulated end markets, and emphasis on metallurgical expertise.
• Shiloh Industries: US-headquartered provider of lightweight aluminium and magnesium castings and engineered solutions primarily for automotive (including EV) applications. Comparable to G&W's automotive/motorsport focus and lightweighting/sand-cast prototyping offering.
• Harrison Castings (Aurelius-owned UK casting group): UK-based iron and aluminium foundry group serving automotive, commercial vehicle, and industrial customers. Closely comparable geography, foundry process, and customer overlap with Grainger & Worrall.
• Dean Group International: UK-based multi-site foundry holding company with aluminium, iron, and steel casting capability across industrial and automotive customers. Directly comparable in terms of UK multi-foundry footprint and customer mix.
• Pace Industries: One of North America's largest aluminium and magnesium die-casting companies serving automotive and industrial customers. Comparable to G&W in casting-metal focus and automotive customer base, though G&W specialises in sand-cast prototyping vs. Pace's higher-volume die casting.
• Cosworth: Iconic motorsport engineering company producing high-performance engines and components (including rollover-cast aluminium blocks for F1-grade applications). Both a long-standing partner of Grainger & Worrall and a directly comparable peer in motorsport engine casting.

Broad incumbents

• Nemak: Global Mexican-headquartered supplier of aluminium components (cylinder heads, engine blocks, EV structural parts, transmission housings) to major automotive OEMs. Comparable automotive aluminium focus at significantly larger scale than G&W.
• GF Casting Solutions (Georg Fischer): Swiss-headquartered global light-metal casting solutions provider serving automotive, commercial vehicle, and industrial customers with iron, aluminium, and magnesium casting. Comparable to G&W in light-metal casting capability and broad sector exposure, at global incumbent scale.
• Mahle Powertrain: Global automotive supplier of engine components, pistons, and powertrain systems — including aluminium casting capability for high-performance applications. Comparable automotive/customer overlap and metallurgical expertise, at much broader scale.
• Martinrea International: Canadian-headquartered Tier 1 automotive supplier of lightweight aluminium/metallic components and assemblies (including structural parts and EV battery enclosures). Comparable to G&W in lightweighting focus and automotive customer base at materially larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/graingerworrall
• YouTubeyoutube.com/@GraingerandWorrall
• Facebookfacebook.com/GraingerandWorrall
• LinkedInuk.linkedin.com/company/grainger-and-worrall

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Grainger & Worrall