Optimising Multi Process Manufacturing for Duplex Stainless Hydraulic Manifold Blocks in the UK Energy Sector
The Challenge
A leading UK manufacturer supplying hydraulic control equipment for industrial energy systems required a specialist subcontract partner to produce a complex Duplex Stainless Steel hydraulic manifold block used within non regulated fluid handling equipment. The component demanded deep intersecting oil galleries, multiple threaded ports, precision sealing faces and extremely tight positional tolerances across several machined surfaces.
The original manufacturing process involved three subcontract suppliers performing turning, milling and finishing independently. This resulted in extended lead times, repeated workholding, cumulative tolerance variation and unnecessary logistics between facilities.
The client approached Strategic Innovations Dundee Ltd to engineer a more efficient production route capable of reducing setup time while maintaining exceptional dimensional accuracy. The project required advanced CNC machining Scotland expertise together with intelligent process planning, without relying on regulated manufacturing sectors or certification dependent production.
The Engineered Solution
Following a detailed review of the customer’s technical drawings and machining strategy, our engineering team redesigned the complete production sequence to minimise handling while improving machining consistency.
Raw Duplex Stainless Steel billets were initially prepared using precision sawing before entering the CNC machining process.
The primary machining operation utilised advanced 5 axis CNC milling to complete five working faces during a single fixture setup. Using simultaneous machining reduced cumulative positional error while eliminating two secondary setups previously required by the customer’s former supply chain.
Adaptive high efficiency toolpaths maintained constant cutter engagement throughout roughing operations, significantly reducing tool deflection while improving cutter life in the work hardening Duplex material.
Critical sealing faces were finished using variable step over strategies, consistently achieving a surface finish of Ra 0.6 µm without secondary polishing operations.
Several intersecting internal oil galleries required extremely accurate breakthrough positions that conventional drilling could not reliably achieve due to complex geometry.
Our engineers incorporated EDM wire erosion Scotland capabilities to produce precision internal relief features and narrow keyway details while maintaining sharp internal corners that conventional milling could not generate efficiently.
Additional threaded inserts and precision locating dowel holes were completed using CNC Precision Turning where appropriate. Supporting bush components were manufactured through CNC sliding head turning, allowing high volume production of small diameter precision turned parts with exceptional repeatability and significantly shorter cycle times.
Each manufactured component then progressed through laser marking for permanent identification before entering our dedicated inspection process.
Finally the manifold blocks were supplied as completed assemblies with customer supplied fittings pre installed through our sub assembly engineering service. This removed an entire assembly stage from the customer’s production facility while simplifying incoming goods management.
The integrated workflow demonstrated how precision engineering Dundee combined with intelligent subcontract manufacturing can reduce complexity without compromising machining accuracy.
The Outcome And Operational Impact
The redesigned manufacturing strategy delivered measurable improvements throughout production.
Setup operations were reduced by 58 percent through consolidation into a predominantly single fixture machining process.
Overall manufacturing lead time decreased by 35 percent, allowing the customer to respond more rapidly to project demand.
Surface finish requirements consistently achieved Ra 0.6 µm across all critical sealing faces while positional tolerances remained within ±0.015 mm throughout production batches.
Manufacturing the supporting precision turned parts alongside the manifold body eliminated multiple purchase orders and reduced supplier coordination costs through a complete subcontract manufacturing UK solution.
By combining 5 axis CNC milling, CNC sliding head turning, EDM wire erosion Scotland and sub assembly engineering within one facility, Strategic Innovations Dundee Ltd delivered a faster, more reliable and highly efficient production process for a technically demanding industrial component.
Have a complex engineering component or production bottleneck? Send your technical specifications and RFQ straight to the engineering team at Strategic Innovations Dundee Ltd for a comprehensive manufacturing evaluation.
