Quality Control & Assurance


We don't try to inspect quality into a job, we build it in. Quality is a company-wide issue. At every stage - from administration to purchasing, from project engineering to the team implementing a production run - there is support for the man at the machine, the point at which component quality is determined.

Total Quality Management

  • Temperature Controlled Environments
  • Dedicated Standards Room
  • 4 Global CMM’s
  • 1 Discovery CMM
  • 1 Leitz CMM
  • 4 Seats of PCDMIS
  • 1 Seat of Quindos for Gear Analysis

Castle Systems and processes

  • Comprehensive Computerised Production Control
  • Integrated Supplier Performance Monitoring
  • Gauges and Quality Check Systems
  • In-Process Probing Measurement & SPC
  • Integrated CMMs
  • Full Traceability.

Castle Quality Approvals

  • AS/EN 9100: rev C
  • ISO 9002
  • SC21 Bronze
  • National Nuclear Energy Authority
  • M.o.D. AQAP 4
  • British Aerospace BAe/AG/QC/SCI Part 3B
  • Various company specific approvals
  • Rolls Royce Certificate of Approval for Precision Machining, Control of Classified Parts, Manufacture of Jigs/Fixtures & RPS 905 App 2
  • Rolls-Royce SABRe


Take The Castle Factory Tour

Factory Tour Factory Tour Factory TourFactory Tour

Castle Precision are a high quality turnkey supplier of complex machined components and assemblies to leading multinational customers in the high tech sectors of Europe and North America.

Our Virtual Factory Tour displays one of the foremost independent production facilities in Europe and the range of capabilities available to our customers.

Take the Factory Tour

60 years of Castle

Castle’s 60 for 60 is a series of activities, events and initiatives to celebrate our 60th Anniversary and mark our commitment to customers, staff, suppliers and the community.

60th Anniversary

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History & Heritage

Castle History & Heritage History & Heritage
Plant List

Plant List

Castle is able to offer a comprehensive solution to all of your machining requirements and has a sustained programme of investment into the latest machine tool technology.

View the Plant List