We are a China-based custom machining manufacturer dedicated to OEM CNC machined liquid cooling plates built strictly per customer drawing, 3D model and written specification. As an experienced liquid cooling plate manufacturer in China, we machine custom cooling plates, water cooling plates and liquid cold plates in aluminum, copper and stainless steel for thermal management engineers who need defined channel geometry, controlled sealing-face flatness and repeatable quality from the first prototype to serial delivery. Milled-channel, vacuum brazed, friction stir welded (FSW), tube-embedded and gun-drilled constructions are all produced in-house.
Whether you are searching for a reliable liquid cool plate China supplier, a custom cooling plate China workshop, an OEM liquid cooling plate partner, or a water cooling plate China maker able to work from STEP, IGES, DXF, PDF or hand-marked sketches, every cold plate we build follows your printed channel layout, port location, thread form, surface finish and leak-tightness requirement. We routinely work from one-off development pieces through to repeat batch and high-volume production, combining CNC milling, CNC turning, drill-and-tap machining, vacuum brazing, friction stir welding, deep-hole drilling and a full range of surface treatments under one coordinated process route.
A selection of CNC machined liquid cooling plates, water cooling plates and liquid cold plates manufactured for power electronics, renewable energy, e-mobility, energy storage, computing and industrial thermal management applications. Every plate below is a custom part produced per customer drawing rather than a stocked standard item.
The construction of a custom liquid cooling plate is selected from the heat-load map, coolant chemistry, working pressure, envelope size and target unit cost. Below are the water cooling plate fabrication processes we most commonly CNC machine and assemble per drawing.
Coolant channels are CNC milled directly into an aluminum or copper base plate and sealed with a machined cover using an O-ring groove and bolted joint, structural bonding or welding. These two-surface milled water cooling plates allow fully custom serpentine, parallel or pin-fin channel paths with closely controlled fin width, wall thickness and channel depth, which makes them ideal when the flow field must follow a specific heat-source layout.
Machined face plates together with stamped, etched or skived fins are joined in a controlled vacuum brazing furnace, creating a flux-free, leak-tight metallurgical bond with high thermal conductivity and no trapped flux residue. Vacuum brazed cold plates are widely chosen for high-power IGBT modules, traction inverters, converters and battery systems that demand pressure resistance and long service life.
Friction stir welding joins the cover to the channeled base in the solid state, below the melting point of the alloy, producing a fine-grained, high-strength and leak-proof seam with very low distortion. FSW liquid cooling plates are particularly suitable for large-format aluminum cold plates used in energy storage racks, EV battery trays and wind power generator cooling systems.
Copper or stainless steel tubing is pressed, bonded or embedded into a CNC machined aluminum or copper body so the coolant remains inside a continuous, proven tube with flexible routing and good pressure tolerance. A tubed liquid cooling plate is a cost-effective solution when the coolant is incompatible with the plate body material or when a non-spill, isolated coolant loop is required.
Straight coolant passages are gun-drilled through solid aluminum, copper or stainless steel plate or bar stock; intersecting cross-holes are then sealed with precision set screws, welded plugs or brazed plugs. The resulting monolithic liquid cool plate contains no brazed or bonded seam and is commonly used for mold cooling, hydraulic systems and high-pressure industrial cooling.
Die-cast or extruded aluminum blanks with pre-formed flow features are finish-machined on CNC machining centers to achieve sealing-surface flatness, accurate port positions and gauged threaded holes. This route combines the efficiency of forming with the accuracy of precision machining for repeat orders of semi-custom and standardized water cooling plates.
Material selection drives thermal conductivity, weight, corrosion resistance, brazeability and cost. We CNC machine liquid cooling plates from the full range of common thermal-management alloys, always from traceable mill stock with recorded heat numbers on request.
The most widely specified alloy for CNC machined aluminum liquid cooling plates: excellent machinability, good strength-to-weight ratio and proven suitability for vacuum brazing and friction stir welding. Used for IGBT cold plates, inverter water plates and battery cooling plates.
A high-conductivity extrusion alloy favored for extruded-then-machined cooling plates and thin-fin structures. It anodizes to a smooth, uniform finish and is commonly selected for telecom, server and LED thermal management cold plates.
7075-T6 serves structurally demanding, high-pressure cold plates, while 5052-H32 is used for formed covers and FSW assemblies thanks to its ductility and weldability. Both are machined to drawing with controlled distortion relief.
Copper delivers the highest thermal conductivity for concentrated heat loads. We CNC machine copper water cooling plates and copper cold plates for laser diodes, CPU/GPU packages, medical RF amplifiers and tightly packed power semiconductors.
Brass manifolds, adapter blocks, tube plates, nozzle inserts and fittings are machined to match the cooling plate assembly, providing durable threads and good compatibility with deionized water and glycol mixtures.
Corrosion-resistant stainless steel cooling plates for aggressive coolants, medical, food, chemical and marine environments. Plates are machined, welded if required and passivated to remove free iron from all wetted surfaces.
Titanium, nickel-copper and cupronickel cold plates are machined for seawater cooling, EMC shielding, extreme-temperature and chemically demanding environments where standard aluminum or copper cannot be used.
Copper inserts, heat spreaders or pedestal islands are embedded into a CNC machined aluminum cooling plate to combine copper's local conductivity with aluminum's light weight and lower overall cost for mixed heat-source layouts.
Custom liquid cold plates from our China workshop appear wherever forced air can no longer remove the heat. The applications below show the range of OEM cooling plates we machine per drawing across industries.
EV and HEV battery pack liquid cooling plates, traction inverter cold plates, onboard charger and DC-DC converter water plates, typically large-format brazed or FSW aluminum cooling plates machined with defined mounting-hole patterns.
IGBT cold plates, SVG and STATCOM water plates, rectifier and converter cooling plates, thyristor and power module liquid coolers with precision-drilled mounting faces and sealed O-ring grooves.
Battery energy storage system (BESS) rack cooling plates, lithium battery module liquid cold plates, UPS cooling plates and charging-pile water plates engineered for even cell-to-cell temperature distribution.
Server cold plates, CPU, GPU and ASIC water cooling plates, AI accelerator cold plates and liquid manifold plates for high-density cloud and HPC racks, machined from aluminum or copper to tight flatness requirements.
Cooling plates for wind driven generators, wind power converter water plates, photovoltaic and solar inverter cold plates, including large FSW liquid cooling plates built to survive outdoor duty cycles.
Fiber laser, laser diode and solid-state laser cooling plates, welding and cutting-head water plates, induction heating and plasma equipment cold plates in copper or aluminum with fine channel structures.
Medical equipment cooling plates, X-ray and CT tube water plates, semiconductor process equipment cold plates and analytical-instrument temperature-control plates machined with controlled cleanliness and fine surface finishes.
5G base station cooling plates, radar and avionics liquid cold plates, fuel cell water plates, rail traction converter cooling plates and defense electronics cold plates engineered to customer mechanical and thermal drawings.
Surface treatment protects the cooling plate against corrosion and wear, controls electrical behavior and defines the final appearance. We apply the following finishes to CNC machined liquid cooling plates exactly as noted on the drawing.
Sulfuric anodizing of aluminum cooling plates in clear, blue, black or custom colors for corrosion protection, a uniform matte appearance and mild abrasion resistance on external surfaces.
Thick Type-III hard anodized layers deliver high abrasion resistance and electrical insulation, often specified on sealing lands and mating faces of aluminum water cooling plates.
A thin conductive chemical film for aluminum cold plates that protects against corrosion while preserving electrical continuity for grounding and shielding contact faces.
Uniform, dimensionally stable nickel coatings on aluminum, copper or steel cooling plates for corrosion and wear resistance; thread and bore sizes are held to drawing after plating.
Tin or silver plating of copper cold plates and contact pedestals to support soldering, brazing assembly and low electrical contact resistance on power-device mounting surfaces.
Stainless steel 304/316L cooling plates are passivated to remove free iron from wetted passages, or electropolished for a bright, smooth, easy-to-clean surface.
Controlled glass-bead or sand-blasted matte textures remove milling marks, homogenize the surface and prepare aluminum and copper plates before anodizing, coating or plating.
Directional brushing, fine buffed or mirror polishing, powder coating and electrophoretic deposition are available when the cooling plate drawing specifies appearance, insulation or extra environmental protection.
A liquid cooling plate only seals and performs when its mating faces are flat, its ports and threads are accurate, and every cross-hole is burr-free. The capabilities below describe what our CNC machining process routinely achieves on custom cooling plates.
General machining tolerances of ±0.02 to ±0.05 mm are standard, while critical bores, dowel holes and sealing features are held to ±0.005 to ±0.01 mm at IT6 to IT8 tolerance grades. Port threads — metric, G (BSPP), NPT and unified forms — are tapped to ring and plug gauge, and O-ring grooves are machined to the selected cord diameter with controlled corner radii.
Sealing-face flatness of 0.02 to 0.05 mm is maintained even on long aluminum cold plates, with surface grinding available when a drawing calls for tighter values. Opposite faces are machined parallel and mounting faces square to port axes so the plate stacks evenly against IGBT modules, busbars or cold-wall frames.
Standard milled faces reach Ra 1.6 µm, fine-finish milling reaches Ra 0.8 µm, and polished sealing lands can be brought to Ra 0.4 µm. Internal channel walls are deburred, cross-holes are blended smooth and all flow paths are cleaned to reduce pressure drop and prevent loose particles from entering the coolant loop.
Every finished water cooling plate can be pressure-held with air or water at the specified test pressure, and helium mass-spectrometer leak detection is available for high-integrity brazed and welded plates. Ultrasonic cleaning, controlled drying and anti-corrosion packing keep internal passages clean and dry before shipment.
Custom cooling plates move through coordinated CNC machining, joining, finishing and inspection stages in the same facility, which keeps lead times short and dimensional control traceable from raw plate stock to the finished liquid cold plate.
Our equipment line for custom liquid cooling plates includes 3-axis and 4-axis CNC vertical machining centers for channel milling and cover machining, high-speed CNC drill-and-tap centers for dense port and mounting-hole patterns, CNC lathes for fittings, manifolds and nozzles, and a controlled-atmosphere vacuum brazing furnace for aluminum cold-plate bonding.
Friction stir welding equipment, deep-hole gun drills and surface grinders extend the range of plate constructions we can produce per drawing, from thin copper cold plates to large FSW aluminum water plates for energy storage and wind power generators.
Channel pockets, pin fins, O-ring grooves and sealing faces milled from solid aluminum, copper or stainless plate stock.
Threaded ports, hose barbs, standoffs, manifold blocks and adapter fittings turned to match each cold plate.
Optical verification of small radii, chamfers, slot widths and cross-hole geometry on machined cooling plates.
Coordinate measurement of hole positions, port spacing, flatness and critical dimensions against the drawing.
Every OEM liquid cooling plate follows the same disciplined route so that what is quoted from the drawing is what arrives as a finished part.
PDF, STEP, IGES, DXF or sample-based drawings are reviewed for wall thickness, channel radius, port thread form, sealing strategy and brazing or welding feasibility, with manufacturability suggestions returned before cutting metal.
The alloy, stock size and construction route — milled-channel, vacuum brazed, FSW, tubed or gun-drilled — are selected, and dedicated fixtures are designed to control distortion on thin and large-format cooling plates.
CNC milling, turning, drilling and tapping are followed by vacuum brazing, friction stir welding or assembly, then by the specified anodizing, plating, conversion coating or other surface treatment.
CMM and optical-projector checks, pressure or helium leak testing, ultrasonic cleaning and controlled drying are completed before dry, anti-corrosion packaging for transport.
As a flexible custom cooling plate China manufacturer, we support the full product lifecycle without forcing minimum-order quantities on development work.
A single CNC machined liquid cooling plate made directly from your drawing for thermal validation, design iteration and fit checks, with fast turnaround on channel and port revisions.
Runs of two to fifty pieces for bench testing and pilot integration, produced with dedicated fixturing and first-article dimensional verification against every drawing dimension.
Stable, repeatable batches of custom water cooling plates with archived tooling paths, fixed process parameters and batch-level traceability of material, treatment and inspection records.
Hundreds to thousands of OEM liquid cooling plates per month using multi-machine fixturing, parallel brazing cycles and standardized in-process checks that keep large orders consistent.
Our focus is narrow and deliberate: CNC machined liquid cooling plates and water cooling plates made exactly to customer documentation. There is no fixed catalog constraining channel shape, plate envelope, port thread or surface finish, and existing parts can also be reverse engineered from a sample when original drawings are unavailable. CFD-designed channel layouts, pin-fin fields, dual-zone circuits and mixed aluminum–copper constructions are all translated into machined reality by engineers who understand sealing, pressure drop and distortion control.
Buyers searching for a liquid cooling plate China supplier, a custom cooling plate China factory, an OEM liquid cooling plate producer, a liquid cool plate China maker, a water cooling plate China workshop or simply a reliable cooling plate China partner will find here a single coordinated source for CNC machined aluminum cooling plates, copper water cooling plates, China vacuum brazed cooling plates, FSW liquid cooling plates, tubed cold plates and gun-drilled cooling plates — across IGBT, EV battery, energy storage, data center, wind power, laser, medical and telecom applications, from one development piece to steady serial production.