Tool Accessibility
Allow cutting tools to reach channels, pockets and holes so features can be machined with stable, practical tooling.
ENGINEERING RESOURCES / DESIGN GUIDES
CNC Machining &
Liquid Cold Plate
Design Guides
Bring manufacturability into your thermal design. Explore practical guidance on cooling channels, materials and tolerances to make clearer engineering decisions before prototype or production.
Build a stronger design before the first part is machined.
Request a Design ReviewEngineering reference imagery
DESIGN FUNDAMENTALS
Start with the Structure.
Design for the Function.
CNC machining creates the geometry that connects your heat source, coolant and assembly. Understanding these interfaces helps you prepare a liquid cold plate design that can be manufactured and inspected.
Precision CNC Machining
Machine channels, ports, mounting holes and sealing grooves from defined CAD models and drawings.
Liquid Cold Plate Design
Combine a conductive structure with a coolant flow path to move heat away from critical components.
Design for Manufacturability
Review tool access, material behavior and assembly requirements early to reduce avoidable production changes.
Connect your thermal requirements with a practical manufacturing route.
Request a Design ReviewDESIGN FOR MANUFACTURABILITY
6 Essential CNC Machining
Design Principles
Accessible features and purposeful specifications simplify manufacturing and inspection, helping you achieve the fit and performance your component needs.
Practical Tolerances
Reserve tight limits for fit, sealing and alignment to focus machining effort where it supports function.
Wall Thickness
Review thin walls and deep features for stiffness so machining and clamping are less likely to distort the part.
Internal Corner Radii
Use suitable internal radii to accommodate milling tools and avoid unnecessary special operations.
Workholding & Setup
Provide useful datums and accessible clamping surfaces to support repeatable positioning between operations.
Inspection Accessibility
Keep critical features measurable so inspection can verify the requirements shown on your drawing.
Resolve manufacturing constraints while the design is still flexible.
Request a Design ReviewKEY DESIGN PARAMETERS
Define the Thermal Target.
Understand the Hydraulic Trade-Off.
Evaluate heat load, coolant conditions and mechanical constraints together. Clear inputs make cooling channel design easier to assess against the complete system.
Heat Load & Temperature
Define heat dissipation, heat source distribution, component temperature limits and coolant inlet temperature to establish the design target.
Coolant Flow Rate
Match the proposed operating flow to coolant properties and available pump capacity to keep the thermal design realistic.
Pressure Drop
Review resistance through channels, bends, ports and manifolds to understand the pumping demand of the finished component.
Thermal Resistance
Define temperature reference points and heat input so the temperature difference per unit of heat can be interpreted consistently.
Engineering tip. Higher flow or smaller channels do not automatically create the best system. Balance heat transfer, pressure loss, pump capability and manufacturability.
Set the operating conditions before refining your channel geometry.
Review My Cold Plate RequirementsMATERIAL SELECTION GUIDE
Choose the Material
around the Application
Cold plate material selection connects heat transfer with weight, corrosion, joining and machining requirements, helping you avoid a specification that solves only one part of the problem.
Aluminum Alloys
A useful balance of heat conduction, low weight and machinability makes aluminum a common choice for cold plates and heat sinks.
Design focus: Review alloy grade, coolant compatibility, joining process and surface treatment.
Copper Alloys
High thermal conductivity supports heat spreading where local heat flux matters. Review the added weight and manufacturing requirements before selection.
Design focus: Check grade, corrosion compatibility, machining complexity and joining requirements.
Stainless Steel
Selected fluid-handling and structural parts may benefit from corrosion resistance and mechanical properties. Lower thermal conductivity must be included in the thermal assessment.
Design focus: Confirm the material grade for your application; the reference photo illustrates component geometry.
Compare material options before you release the drawing.
Discuss Material SelectionTOLERANCE DESIGN GUIDE
Specify Precision
Where Function Depends on It
Purposeful CNC machining tolerances support fit, sealing and assembly. Identifying critical features gives manufacturing and inspection a clearer target without overconstraining every surface.
Dimensional Tolerances
Set limits according to feature function and the mating component so the drawing expresses the fit you need.
Flatness & Parallelism
Identify thermal contact, sealing and mounting surfaces so geometric controls protect the important interfaces.
Hole Position & Alignment
Establish functional datums and position requirements to keep fasteners, coolant ports and assembly features aligned.
Surface Roughness
Specify finish on critical interfaces according to sealing and contact needs to avoid unnecessary finishing elsewhere.
Dimension from functional datums. Reflect how the component is assembled and inspected. Review tolerance stack-up and clearly identify critical-to-function dimensions before production.
Make the drawing communicate your assembly requirements.
Review My Tolerance SpecificationSURFACE FINISH DESIGN GUIDE
A Finish Has to Work
at Every Interface
Finish requirements affect more than appearance. Defining protected, masked and controlled surfaces helps preserve contact, sealing and assembly function.
Anodizing Considerations
Review coating thickness, corrosion needs and electrical or thermal interface requirements before specifying anodizing.
Thermal Contact Surfaces
Match flatness, roughness and finish to the thermal interface material and mounting conditions.
Coolant Compatibility
Consider coolant chemistry and mixed metals to select an appropriate material and protection strategy.
Dimensional Effects
Allow for finish thickness and masking on threads, sealing lands and other critical interfaces.
Identify critical surfaces before choosing the finish.
Discuss Surface RequirementsTESTING & VALIDATION GUIDE
Read the Conditions.
Then Compare the Results.
A documented setup connects measurements to real operating requirements, helping your team interpret liquid cold plate performance and compare design revisions consistently.
Thermal Performance Testing
Review heat input, coolant inlet conditions, temperature locations and contact conditions to understand the reported thermal response.
Pressure Drop Testing
Check flow rate, coolant properties and pressure measurement points so hydraulic results have a defined comparison basis.
Leak & Pressure Testing
Agree test medium, pressure, duration, method and acceptance criteria to evaluate sealing integrity against the intended requirement.
Test Report Interpretation
Look for units, instrument details, component identification and acceptance limits to keep the results traceable and useful.
Compare equivalent conditions. Different procedures or temperature references can make thermal resistance, pressure drop and leak results unsuitable for direct comparison.
Turn your operating requirements into a clear validation scope.
Discuss Testing RequirementsAPPLICATION DESIGN CONSIDERATIONS
Design around the Equipment
Your Cold Plate Must Serve
Application-specific geometry and interfaces help translate cooling requirements into a component that fits the equipment, supports assembly and can be manufactured consistently.
AI Servers & Data Centers
Compact thermal interfaces and controlled coolant paths support high-power computing integration.
Design focus: Heat flux distribution, pressure drop, mounting alignment and serviceability.
EV Power Electronics
Cooling plates must fit packaging limits while responding to operating load, vibration and the coolant environment.
Design focus: Weight, mounting integrity, coolant compatibility and temperature uniformity.
Industrial Laser Equipment
Compact cooling geometry and stable contact surfaces help integrate temperature control within constrained equipment space.
Design focus: Thermal stability, contact quality, flow distribution and compact packaging.
Share the packaging and operating conditions that shape your application.
Discuss My Application
DESIGN QUALITY REQUIREMENTS
Define Quality
Before Manufacturing Begins
Clear drawing requirements let inspection planning start early, helping your team verify the features and records that matter to the finished assembly.
Critical Dimensions
Identify functional tolerances and datums so inspection focuses on the interfaces that determine performance.
Material Specifications
State grade, applicable standards and certification needs to support material verification and traceability.
Inspection Planning
Agree dimensional checks, surface evaluation and additional verification before the manufacturing route is fixed.
Quality Documentation
Define measurement reports, material records and customer documents so the required evidence is available at handover.
Project-specific inspection requirements should be agreed before manufacturing. Certification and documentation requirements must be confirmed for the individual project.
Specify the evidence you need alongside the component drawing.
Review My Quality RequirementsENGINEERING FAQS
CNC Machining &
Cold Plate Design Questions
Practical answers help you prepare more complete drawings and focus the engineering discussion on your component’s functional requirements.
How can I make a CNC machined part easier to manufacture?
Allow tool access, use practical internal corner radii, identify functional datums and reserve tight tolerances for critical features. An early DFM review can identify geometry that needs special tooling or additional setups.
What should I consider when designing cooling channels?
Review heat distribution, coolant type, flow rate, pressure drop, wall thickness and the selected joining route. Channel geometry must meet thermal objectives while remaining manufacturable and cleanable.
How do I select between aluminum and copper for a cold plate?
Compare thermal performance with weight, coolant compatibility, machining and joining needs. Copper can improve heat spreading, while aluminum often offers a useful balance of weight and manufacturability. Evaluate the complete assembly.
Should all dimensions have tight machining tolerances?
No. Apply limits according to function, fit and inspection needs. Overly tight limits on noncritical geometry can add machining and inspection effort without improving the assembly.
What factors affect the machinability of deep cooling channels?
Tool reach and diameter, channel width, internal radii, wall stiffness, chip evacuation and workholding all influence the route. Review deep or narrow features with the intended manufacturing process.
How should I specify surface roughness for a thermal contact surface?
Base the specification on the mating surface, interface material, contact pressure and thermal target. State geometric controls separately and review finish requirements for sealing or coating compatibility.
When should I request a DFM review?
Request a review while feature geometry, material and tolerance decisions can still change. Revisit the review when design revisions, quantities or the manufacturing route change.
What information should I provide for a CNC design review?
Share 2D drawings and 3D models, material, quantity, critical dimensions, coolant and thermal conditions, joining requirements, inspection needs and the intended application.
Have a question specific to your drawing or cooling system?
Ask an Engineering Question
DESIGN OPTIMIZATION GUIDE
5 Ways to Improve
CNC Manufacturability
Reviewing complex features before production helps identify avoidable machining and inspection work, giving you a route to simplify the design while protecting its intended performance.
01 · Apply Functional Tolerances
Keep tight limits where fit, sealing or alignment requires them. Use practical limits on noncritical features.
02 · Review Deep & Narrow Features
Assess tool access, reach and wall stability to identify challenging pockets and cooling passages.
03 · Use Practical Internal Radii
Choose radii compatible with suitable milling tools where the functional design allows.
04 · Reduce Additional Setups
Review feature orientation, clamping and datums to simplify how the part moves between operations.
05 · Match Material & Finish to Function
Select grades and treatments that meet the actual thermal, structural and environmental requirements.
Protect performance. Evaluate each change against thermal, hydraulic, structural and reliability requirements. The machining image illustrates tool access, not a measured before-and-after cost comparison.
Find opportunities to simplify your design before quotation.
Request a DFM ReviewENGINEERING COLLABORATION
From Initial Drawing
to Manufacturing Review
A structured technical review connects your design intent with manufacturing constraints, helping your team resolve open questions before committing to production.
01
Share Your Drawings
Provide 2D drawings, 3D models, materials and project requirements to establish a clear review starting point.
02
Design Evaluation
Review geometry, tool access, critical tolerances and manufacturing constraints to identify questions early.
03
DFM Recommendations
Discuss practical changes and manufacturing options so design decisions reflect the functional priorities.
04
Manufacturing Review & RFQ
Confirm requirements and quantities to prepare the next step in quotation or prototype planning.
Start with the information you have and identify the next engineering decisions.
Start My Design ReviewENGINEERING RESOURCES
Keep Your Next
Design Decision Informed
Use the guidance on this page to connect component design with materials, validation and manufacturing planning, then bring unresolved requirements into an engineering review.
CNC Machining Design Checklist
Review drawings, tool access, tolerances, materials and critical features before release.
Review Design Principles ↗Material & Technical Comparisons
Compare the requirements that shape material choice and cold plate performance.
Review Materials & Parameters ↗Testing Methods & Reports
Understand the conditions and reporting details needed to interpret validation results.
Review Testing Guidance ↗Thermal Management Applications
Review common thermal, hydraulic and mechanical priorities across equipment types.
Explore Application Guidance ↗Need help applying a guide to your specific component?
Discuss My Design RequirementsENGINEERING SUPPORT & CUSTOM MANUFACTURING
Have a Design Challenge?
Let’s Review the Details.
Share your cold plate or CNC component requirements. Reviewing geometry, cooling conditions and manufacturing constraints helps identify a practical next step toward prototype or production.
Drawing & DFM Review
Discuss tool access, critical features and manufacturing feasibility.
Manufacturing Process Support
Review material selection, machining and downstream joining requirements.
Prototype & Production Planning
Connect the technical requirements with quantities and quotation needs.
Request a Design Review or Custom Quote
Prepare your design details for the engineering team.
Form layout preview. Continue to our contact page to send your inquiry.
Share your drawings and requirements to start a technical discussion.
Continue to Design Inquiry