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Business Details
38 Years
experience
Your Trusted Precision Engineering Partner in County Durham
Established in 1988, Protocol Engineering has built a reputation for excellence in precision and general engineering. Our expertise spans design through to manufacture, serving diverse sectors including automotive, aerospace, plastics, food, electronics, and pharmaceuticals. We specialise in producing one-off bespoke components and medium-scale batch production, utilising both CNC and conventional machining techniques. Our commitment to innovation, quality product development, and investment in advanced machinery ensures we meet the evolving needs of our clients.

With a workforce trained through our own apprenticeship programme, many of whom have over 20 years of service, we combine technical excellence with a flexible, customer-focused approach. Our location in County Durham positions us to deliver reliable engineering solutions tailored to client specifications. By maintaining a balance between tradition and modernity, we ensure our business remains adaptable and resilient in a competitive industry.
Services
Grinding Reverse Engineering Prototype Machining CNC Milling CNC Turning Welding & Fabrication Heat Treatments Laser Cutting
Details
  • Year established: 1988
Highlights and features
  • We offer over 35 years of precision engineering expertise since 1988.
  • Our team includes engineers trained through our in-house apprenticeship programme.
  • We serve diverse industries including aerospace, automotive, and pharmaceuticals.
  • Our investment in advanced machinery ensures high-precision manufacturing capabilities.
  • We maintain flexibility to adapt to unique customer requirements.
Services
Surface Grinding
Our surface grinding services deliver high-precision components for industrial applications. Using CNC and manual equipment, we process materials like steel, aluminium, and plastics to exact specifications. Ideal for creating flat surfaces with tight tolerances, this service supports sectors requiring robust engineering solutions.
Reverse Engineering
We specialise in manufacturing replacement parts without original drawings. Using sample components, our reverse engineering process ensures accurate replication while maintaining material integrity. This service is critical for maintaining legacy equipment across automotive, aerospace, and manufacturing sectors.
Prototype Machining
From concept to production, we support prototype development with material selection advice and iterative design improvements. Our engineers collaborate closely with clients to refine prototypes into scalable production components, ensuring functionality and cost-efficiency for diverse industrial applications.
CNC Milling
Our CNC milling capabilities handle complex geometries in metals and plastics, with capacities up to 1000mm x 500mm x 500mm. This service provides high-accuracy parts for industries demanding precision-engineered components, supported by both modern CNC and conventional machining techniques.
Heat Treatments
We offer vacuum hardening, induction hardening, and plasma nitriding services to enhance material properties. These treatments improve component durability and performance, meeting the rigorous demands of sectors like aerospace and heavy engineering where material integrity is critical.
People
John Urquhart
Managing Director
With over 35 years leading Protocol Engineering, John Urquhart has driven the company's growth through strategic investment in machinery and workforce development. His commitment to apprenticeships ensures a skilled team delivering precision engineering solutions.
Questions
What industries do you serve?
We support automotive, aerospace, plastics, food, electronics, and pharmaceutical sectors with precision engineering solutions.
Can you replicate parts without drawings?
Yes, our reverse engineering service creates accurate replacements from physical samples using advanced measurement techniques.
Do you handle prototype development?
We assist with prototype design, material selection, and production readiness, guiding clients from concept to full-scale manufacturing.
What machining capabilities do you have?
Our CNC milling and turning facilities handle components up to 1000mm x 500mm x 500mm in metals and plastics.
How do you ensure quality?
Through continuous investment in machinery, staff training, and rigorous quality control processes aligned with industry standards.
Reviews (1)
Ben Mcconnell
Dec 11, 2020 Report
After having a shocking experience with Dyer Dire Engineering I turned to these guys. They have already been an absolute delight to deal with. I left the parts and spec drawing and they could have just gone with that but went the extra mile and did some research on the part required to ensure I got exactly what I needed. It took them less than 24hrs to resolve my issue where it took the other company 4 weeks to rage me enough to change company. Thanks guys