Mollart-cox Engineering

Mollart Cox Engineering Limited is a UK-based contract manufacturer with a significant presence in large-scale precision engineering. Operating from a 45,000 sq. ft. facility in Chesterfield, the company specialises in complex CNC machining, deep hole drilling, gun drilling, honing, and trepanning for demanding applications. Their expertise lies in handling large, complex, and high-precision components that often exceed the capabilities of other manufacturers.

The company offers a comprehensive suite of precision engineering services, including CNC milling, turning, and 5-axis machining, alongside bespoke tooling design and manufacture. Their deep hole drilling capabilities accommodate bore diameters from 25mm to 300mm and component lengths up to 10,000mm. Mollart Cox also provides UK-leading gun drilling for smaller bores (1.8mm to 40mm) and advanced honing services achieving tolerances as low as 0.0125mm. They serve critical sectors such as Oil & Gas, Aerospace, Defence, Nuclear, Hydraulics, and Off-Highway.

Mollart Cox holds ISO 9001:2015 certification, alongside JOSCAR and Cyber Essentials Plus accreditations, underscoring their commitment to quality and security. They leverage advanced CAD/CAM software and a robust list of modern machinery, including Mazak, Doosan, and Correa equipment, supported by QCT CMM and Hexagon Romer Arm inspection systems. The company provides full in-house project management and technical support, positioning themselves as a reliable partner for solving complex engineering challenges with accuracy, scale, and repeatability.