Business Details
Precision CNC Machining Services in Chesterfield
Mollart Cox Engineering stands as one of the UK's foremost CNC machining subcontractors, specialising in precision engineering for critical industries. With decades of experience supporting sectors such as Oil & Gas, Aerospace, Defence, and Nuclear, we combine technical expertise with advanced facilities to deliver complex, high-value components. Our 45,000 sq. ft. Chesterfield facility houses state-of-the-art machinery capable of handling projects from one-off prototypes to full-scale production. We maintain an ISO 9001:2015-certified quality management system, ensuring traceability and consistency across all operations. Our capabilities span deep hole drilling, honing, 5-axis machining, and large-capacity CNC milling and turning.The company's foundation in deep hole drilling, established over many years, remains a core strength. We invest continuously in technology, including Mazak and Doosan 5-axis machining centres, to maintain technical leadership. Our in-house CAD/CAM team utilises SOLIDWORKS and FeatureCAM software for precision design and manufacturing. Advanced scheduling systems integrate with MRP and quality controls to optimise production flow and delivery timelines. This combination of scale, skill, and systems enables us to tackle engineering challenges others cannot address.
Services
CNC Milling
Deep Hole Drilling
5 Axis Machining
CNC Turning
Gun Drilling
CNC Honing
Trepanning
Highlights and features
- We have decades of experience in precision machining for critical industries.
- Our ISO 9001-certified quality management system ensures consistent, traceable results.
- We design and manufacture bespoke tooling for specialist drilling projects.
- Our 45,000 sq. ft. facility houses the UK's most advanced machining equipment.
- We operate 24/7 production schedules to meet urgent project deadlines.
Associations and certifications
- ISO 9001
Services
CNC Milling
Our precision CNC milling capabilities handle complex, high-value components in materials including stainless steel, aluminium, and exotic alloys. Multi-axis milling centres enable machining of parts with tight tolerances and intricate geometries. From small-batch prototypes to large-volume production, we maintain absolute control from design to delivery for critical sectors like Aerospace and Defence.
Deep Hole Drilling
Specialist deep hole drilling services achieve Total Indicator Readings of 0.002 for applications in Oil & Gas and Nuclear sectors. We handle component lengths up to 10,000mm and diameters from 25mm to 300mm using dedicated drilling machines. In-house tooling design ensures precision for multi-bore components requiring parallelism and concentricity.
5 Axis Machining
Advanced 5-axis machining reduces setups while improving accuracy for complex geometries. Our Mazak and Doosan centres enable simultaneous X/Y/Z/B/C axis movement to machine five part faces in one operation. This capability benefits Aerospace and Energy sectors requiring compound angles and deep pockets with tight tolerances.
Gun Drilling
UK-leading gun drilling handles diameters from 1.8mm to 40mm with lengths up to 6,000mm. Purpose-built 6-metre equipment achieves exceptional straightness and surface finish for cooling channels and precision bores. Advanced fixturing allows drilling of concentric and offset bores in irregular components.
CNC Honing
CNC honing achieves 0.0125mm tolerances and 8 CLA surface finishes for hydraulic cylinders and precision tubes. Using Ohio Tool Works equipment, we improve bore roundness, straightness, and cylindricity. Complementary skiving and roller burnishing processes meet exacting performance requirements for Defence and Hydraulics applications.
Questions
What industries do Mollart Cox Engineering serve?
We specialise in critical sectors including Oil & Gas, Aerospace, Defence, Nuclear, and Hydraulics requiring precision-machined components.
What machining capabilities does Mollart Cox offer?
Our services include CNC milling, deep hole drilling, 5-axis machining, gun drilling, honing, and trepanning for components up to 10 metres.
Is Mollart Cox Engineering ISO 9001 certified?
Yes, we maintain an ISO 9001:2015-certified quality management system with full traceability across all operations.
Can Mollart Cox handle large-scale production runs?
Our 45,000 sq. ft. facility supports both one-off prototypes and high-volume production with dedicated scheduling software.
What materials can Mollart Cox machine?
We work with stainless steel, aluminium, exotic alloys, and hardened metals for complex engineering applications.
Do you offer bespoke tooling solutions?
Yes, our engineering team designs and manufactures custom tooling for specialist drilling and machining projects.
