Five-Axis CNC Machined Aluminum Hydraulic Valve Manifold
Hydraulic valve manifolds five-axis machined from 6082-T6 block, with four to fourteen ports spread over four faces, cross-drilled galleries, cartridge cavities and port faces flat to 0.02 mm. Every block is ultrasonically cleaned, borescoped and pressure tested at 1.5 times its rating before the ports are plugged and the map is issued.
- Ports on Four Faces
- Flat Port Faces 0.02 mm
- Galleries Borescoped
- Pressure Tested 1.5×
*Send the hydraulic schematic and the machine envelope. A manifold is a routing decision as much as a machining one, and the drawing that matters is where the hoses have to land.
Hydraulic Valve Manifold Overview
A manifold replaces a wall of fittings with holes in a block. That only pays off if the holes meet where the schematic says and the block is small enough to fit where the hoses need it, which is why the port layout is designed before the block is drawn.
The block is squared, datum faces are marked, and ports are machined from those datums on a five-axis machine so the faces that sit at an angle are cut without a separate fixture. Galleries are drilled in stages, cleaned, borescoped and then proven by the pressure test.
6082-T6 Aluminium Block
6082-T6 is the usual choice for a mobile or machine-tool manifold because it is strong enough for 250 bar at a 2.5 mm wall and anodizes hard enough to resist hydraulic oil with water contamination.
7075-T6 or 316L Stainless
7075-T6 is used where the manifold is also a structural block and weight is critical. 316L is chosen for water-glycol, seawater or food-grade circuits where aluminium would corrode at a gallery intersection.
Pressure, fluid and weight set the material in that order. Above 250 bar aluminium stops being the default and steel or stainless takes over whatever the weight penalty.
Hydraulic Valve Manifold Specifications
Five-axis data for aluminium manifolds, with port, gallery and test values that decide whether the circuit holds and the pipework fits.
| Specification | Machining Data | Specification | Machining Data |
|---|---|---|---|
| Product | Hydraulic Valve Manifold Block | Machining Process | 5-Axis CNC Milling, Deep Hole Drilling, Tapping |
| Material | 6082-T6 Aluminium Block | Port Count | 4 – 14 Ports, Multiple Faces |
| Port Threads | G1/4 – G1, BSPP or SAE | Port Face Flatness | 0.02 mm |
| Port Position | ±0.03 mm | Gallery Diameter | Ø 4 – 16 mm |
| Minimum Wall | 2.5 mm at Intersections | Surface Finish | Ra 1.6 µm Port Faces, Ra 3.2 µm Body |
| Working Pressure | Up to 250 bar (Aluminium) | Test Pressure | 1.5 × Rating, 10 min Hold |
| Customization | Cartridge Cavities, Gauge Ports, Accumulator Boss | Lead Time | 7 – 10 Days Sample, 15 – 20 Days Batch |
| Inspection | Pressure Test, Borescope, Thread Gauges, CMM Port Map | Packing | Port Plugs, VCI Bag, Foam-Lined Crate |
Key Features of Our Machined Manifolds
One datum for every face, tested before it ships.
Every Port From One Datum
Angled and side ports are machined with the block rotated rather than re-fixtured, so all port positions trace to datum A and the pipework built from the map fits first time.
Port Faces Spotfaced Flat
Each port face is spotfaced to 0.02 mm and square to its thread, so a bonded washer or an O-ring port seals without a sealant joint that creeps under pressure.
Galleries Proven, Not Assumed
Long galleries are borescoped for swarf and drill marks before assembly, and the pressure test then proves the circuit holds rather than merely that it was drilled.
Threads Cut to Pre-Plate Size
Threads are cut oversize by the coating thickness when the block is anodized, so a coated port still takes a fitting by hand rather than needing a tap.
Circuit that has to fit inside one block?
Surface Finishes for Hydraulic Manifolds
The galleries see the oil and the outside sees the machine, so the two are finished differently.
| Finish | Main Purpose | Finish | Main Purpose |
|---|---|---|---|
| Hard Anodizing | Wear and corrosion resistance on an aluminium body | Masked Threads | Keeps port threads at gauge size after coating |
| Chromate Conversion | Conductive finish for a manifold on a machine frame | Bead Blasting | Even exterior before anodizing |
| Laser Marking | Port lettering and flow direction on each face | Ultrasonic Cleaning | Removes swarf from galleries before test |
*Hard anodizing grows into the thread and the gallery. Threads are masked and galleries are plugged, otherwise a coated port will not take a fitting and a coated gallery changes the flow area.
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Five-Axis Machining Process for Manifolds
Ports are machined on four faces from one datum, so the pipework built from the port map fits the block without a single re-bend.
01. Circuit and Envelope Review
Trace each line of the schematic onto the block, check the wall at every crossing and confirm the port positions against the hoses that have to reach them.
02. Square and Datum the Block
Machine all six faces square, mark datum A and B and record the block size, since every port and gallery is programmed from those faces.
03. Machine Ports on All Faces
Rotate the block on the trunnion to face, drill and tap each port, so angled faces are machined without a second fixture and the datum never changes.
04. Drill and Clean the Galleries
Drill in stages with swarf clearance, break through into the intersecting gallery, then ultrasonic clean and borescope before the block is closed up.
05. Test, Plug and Ship
Plug the ports, hold at 1.5 times the rating for ten minutes, record the result, gauge every thread and issue the port map with the crate.
Send the hydraulic schematic with the space the block has to fit, and we will quote the manifold with the port map and test plan agreed first.
Hydraulic Valve Manifold FAQs
Four to fourteen on four faces is routine in aluminium up to 200 mm cube. Beyond that the wall between galleries becomes the limit and a two-piece block with an O-ring joint is the better answer.
Yes, for common cartridge formats, either with a form tool or interpolated. The seat diameter and depth are checked with a plug gauge against the valve drawing before the block is tested.
1.5 times the rated working pressure for ten minutes as standard, with the gauge reading recorded against the serial number. Higher test pressures need a thicker wall and are quoted separately.
Because ports often land on faces that are not square to each other. Machining them on a trunnion keeps every port on one datum, where three-axis machining needs a fixture per face and accumulates position error.
Yes, a dimensioned map of every port with its thread and function is issued with the first article, so the pipework can be made before the blocks arrive.
Drilled in stages with swarf clearance between passes, ultrasonically cleaned, then borescoped. The pressure test is the final proof: a blocked gallery shows as a slow drop during the hold.
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