Large 5-Axis CNC Machining for Complex Industrial Components
Openex Metal Fabrication provides large 5-axis CNC machining for industrial components with complex contours, angled features and demanding machining-access requirements. Applications may include selected turbine components, marine parts, industrial housings, tooling, castings, forgings and fabricated structures.
Simultaneous 5-axis machining coordinates linear and rotary axis movement during cutting. This can improve tool access to complex surfaces and reduce the need to reposition a workpiece between operations. Whether a component can be machined in one setup depends on its geometry, weight, fixture design, tool reach and the required tolerances.
Openex combines CNC machining with heavy manufacturing capabilities for projects that may involve large castings, forgings or weldments. Our engineers review the component and select a suitable machining route rather than assuming every oversized part belongs on the same machine.
Machining method
Simultaneous 5-axis
For suitable complex surfaces and tool paths.
Large gantry envelope
Up to 50 m
Published machine length; usable range depends on the setup.
Project evaluation
Drawing-based
Geometry, tolerances, weight and tool access are reviewed.
Need to machine a large or complex component?
Send a 3D model and drawing to check machine compatibility, setup strategy, critical tolerances and inspection requirements.
Request a Machining ReviewWhat Large 5-Axis CNC Machining Can Improve
Five-axis machining is most useful when component geometry makes conventional tool access difficult. The main benefit is not simply having more axes; it is choosing an appropriate tool orientation and machining sequence for the part.
Simultaneous 5-Axis Machining for Complex Contours
Simultaneous 5-axis machining coordinates the machine's linear and rotary axes during cutting. This approach is useful for sculptured surfaces, compound angles and complex contours that are difficult to produce efficiently with conventional 3-axis machining.
- Suitable for selected impellers, turbine components and marine parts.
- Can reduce repeated repositioning and some secondary finishing operations.
Fewer Setups for Complex Parts
Depending on the component geometry, 5-axis machining can provide access to multiple faces and angled features with fewer workpiece repositioning operations. The engineering review considers fixture design, tool reach, collision clearance, part rigidity and the required inspection datums.
- Fewer setups can reduce cumulative positioning errors.
- Appropriate tool orientation can improve access and cutting conditions.
Components That May Benefit from Large 5-Axis Machining
The following component groups may benefit from five-axis machining when their surfaces, angled features or accessibility requirements justify it. The appropriate process is determined from the drawing and model.
Turbine and Power-Generation Components
Selected turbine casings, runner components, impellers and other complex power-generation parts where surface geometry and tool access influence the machining strategy.
Marine Components
Propeller-related components, rudder parts and other marine components with compound surfaces, subject to material, geometry and machine-envelope review.
Aerospace Tooling and Structural Parts
Large tooling, fixtures, frames and suitable structural components with multi-angle features. Final feasibility depends on the required tolerances, material and approved manufacturing scope.
Heavy Castings, Forgings and Weldments
Selected industrial housings, machine structures, castings and fabricated assemblies that need CNC milling of complex faces or features. Large-part handling and 5-axis machining limits are evaluated separately.
Large 5-Axis CNC Machining Specifications
Openex's published equipment inventory identifies large gantry machinery with simultaneous 5-axis capability. The machine envelope and the facility's heavy-workpiece handling capability are separate considerations. Final acceptance depends on the specific machine, workholding arrangement, machining strategy and inspection plan.
| Parameter | Capability or consideration |
|---|---|
| 5-axis machining | Simultaneous 5-axis and 3+2 positional machining, depending on machine configuration and part requirements. |
| Published large gantry envelope | The equipment list identifies a Schiess gantry machine with an envelope of 50,000 × 8,000 × 7,000 mm. The usable working range depends on the machine setup, tool head, fixtures and part geometry. |
| Heavy workpiece handling | Openex's wider facility handles applicable workpieces up to 250 metric tons on suitable equipment. This is not a blanket payload rating for the 5-axis gantry. |
| Workpiece types | Castings, forgings, fabricated weldments, billets and plate, subject to material and machining review. |
| Programming and collision review | Multi-axis CAD/CAM programming and simulation can be used to assess tool paths, tool access and potential collisions before machining. |
| Dimensional inspection | Inspection planning can include coordinate measurement and large-volume metrology, selected according to the component's dimensions and drawing requirements. |
For equipment details, see the Openex manufacturing equipment list . For oversized workpieces that may require another machining configuration, review our heavy CNC machining services .
How We Evaluate a Large 5-Axis Machining Project
A successful machining plan starts with the part requirements, not the machine name. These are the key stages of a typical engineering review.
Review the Model and Drawing
Identify the overall dimensions, material, critical surfaces, datum scheme, tolerances and features that are difficult to reach with conventional machining.
Confirm Machine and Workholding Compatibility
Check the machine's usable travel, tool-head configuration, workpiece support, fixture access, weight limits and collision clearance.
Plan the Machining Strategy
Select simultaneous 5-axis, 3+2 positioning or a combination of machining operations according to geometry, tool access, accuracy requirements and production efficiency.
Agree Inspection and Acceptance Criteria
Define how critical dimensions, geometric tolerances and surface requirements will be verified and documented before production begins.
Dimensional Inspection for Large Machined Components
Large components can be difficult to measure because of their size, datum locations and access restrictions. Inspection planning should identify critical dimensions and the appropriate measurement method before machining starts.
Depending on the component and drawing requirements, inspection may involve coordinate measuring equipment, laser-tracker measurements or other agreed methods. Measurement equipment, acceptance criteria and reporting should be confirmed for each project.
Learn more about our inspection and metrology capabilities .
What to Send for a Large 5-Axis CNC Machining Quote
The more complete the technical information, the easier it is to assess machine suitability, identify production risks and prepare a useful quotation. If your design is still preliminary, send the information available and identify what remains undecided.
- 3D CAD model, preferably STEP, plus 2D drawings in PDF or another agreed format
- Material grade, material specification and blank type
- Overall dimensions, estimated weight and current manufacturing stage
- Critical dimensions, geometric tolerances and datum requirements
- Surface finish, inspection and documentation requirements
- Required quantity, target delivery date and shipping destination
Ready to discuss your component?
Email your drawings and model to Openex. Our team can review the requirements and identify the information needed to confirm machining feasibility.
Request a 5-Axis Machining QuoteFrequently Asked Questions About Large 5-Axis CNC Machining
What is the difference between simultaneous 5-axis and 3+2 machining?
In 3+2 positional machining, the rotary axes position the tool or workpiece at a selected angle and generally remain fixed during the cutting operation. In simultaneous 5-axis machining, the linear and rotary axes can move together while cutting. Simultaneous motion is useful for certain continuously curved surfaces and complex tool paths, while 3+2 can be suitable for angled faces and multi-sided features.
Can Openex machine very large or heavy components using 5-axis CNC?
Openex operates large gantry machining equipment and also handles heavy components on applicable machines. The maximum weight of a workpiece that can be machined on a specific 5-axis machine depends on its table or support arrangement, fixtures, dimensions, tool access and machining strategy. Submit the part drawing and estimated weight so the engineering team can confirm feasibility.
What is the maximum size of a component for large 5-axis machining?
Openex's published equipment list identifies a Schiess gantry with a machine envelope of 50,000 × 8,000 × 7,000 mm. This is a machine-envelope specification, not a guarantee that every part of those dimensions can be machined in one setup. Usable travel, tool reach, rotary-head clearance and fixture requirements must be checked for the specific part.
What materials and blank types can be considered?
Potential workpiece types include castings, forgings, fabricated weldments, billets and plate in materials such as carbon steel, alloy steel, stainless steel, aluminum and other engineering metals. Material suitability depends on the grade, blank condition, geometry, cutting requirements and applicable machine configuration.
How are large machined components inspected?
Inspection is planned around the drawing, datums, critical dimensions and acceptance criteria. Depending on the component and required accuracy, the plan may use coordinate measuring equipment, laser-tracker measurements or other agreed methods. Inspection scope and reporting requirements should be confirmed before production.
What information should I provide for a 5-axis CNC machining quote?
Provide a 3D model, 2D drawings with tolerances, material grade, blank type, overall dimensions, estimated weight, critical features, inspection requirements, quantity and target delivery date. If some information is not available yet, send the preliminary files and identify the items that still need confirmation.
Large-Part Machining Assessment
Have a Complex Part to Machine?
Share your 3D model, drawings, material specification and critical tolerances. Openex can review the component's geometry, machining approach and inspection requirements before confirming feasibility.
Prefer to speak with the team? (+86) 186-5928-0806