Precision Deep Hole Machining for Aluminum Components
CNCALPARTS provides specialized CNC machining for aluminum parts requiring deep drilling, boring, and complex internal features. Our aluminum-only focus helps engineers and procurement teams reduce production variability in critical components.
500 mm
Maximum drilling depth, depending on diameter
Ø1.0 mm
Minimum hole diameter
±0.01 mm
Hole tolerance capability
Methods
Gun drilling, boring, and through-spindle coolant
Focus
Robotics, automation, and industrial equipment
Process capability
Control the full depth-to-diameter challenge
Deep hole machining in aluminum demands geometry control, stable chip evacuation, and process parameters tuned for rapid thermal expansion and gummy chip formation.
| Feature | Specification |
|---|---|
| Drilling Depth | Up to 500 mm, depending on diameter |
| Minimum Hole Diameter | Ø1.0 mm |
| Hole Tolerance | Down to ±0.01 mm |
| Straightness and Alignment | Specialized piloting and pecking cycles |
| Internal Surface Finish | Ra 0.8–3.2 μm |
| Machining Methods | Gun drilling, high-pressure through-spindle coolant, and boring |
| Cross-Hole Management | Deburring and internal intersection cleaning |
Engineering control
Designed around the behavior of aluminum
The deeper the hole and the thinner the surrounding wall, the more important it becomes to manage heat, chips, tool stability, and workholding as one connected process.
Chip evacuation
High-pressure coolant forces chips out of deep cavities, reducing recutting, tool seizure, and internal surface scarring.
Thermal stability
Feed rates and dwell times are optimized to limit dimensional changes as the part returns to ambient temperature.
Supported workholding
Custom fixtures support thin-walled structures and help prevent deformation during drilling and boring.
Straightness and cross-holes
Pre-drilling and controlled boring reduce drill wander. Intersections are deburred and cleaned for reliable internal flow paths.
Aluminum material expertise
Parameters matched to your alloy and temper
Our process is optimized exclusively for aluminum, with drilling and boring parameters selected around the strength, thermal response, and application requirements of each grade.
6061-T6
A versatile choice for structural components, manifolds, and general industrial parts.
Built for functional internal features
Applications where deep holes matter
Fluid power manifolds
Valve blocks with complex internal channels, intersecting passages, and high-tolerance ports.
Cooling housings
Enclosures with deep cooling channels or heat sink features requiring controlled internal geometry.
Robotic arms
Structural parts with internal cable routing paths and deep-bored mounting points.
Optical mounts
Housings with deep bores for lens alignment, sensor integration, and repeatable positioning.
Inspection and documentation
Verify internal features beyond visual inspection
Deep holes require dedicated inspection methods to confirm diameter, taper, position, perpendicularity, intersection quality, and internal deburring.
Bore gauging
Plug gauges and dial bore gauges verify diameter and taper.
CMM verification
Coordinate measurement confirms hole position and perpendicularity against external datums.
Internal inspection
Endoscopes support visual checks of cross-hole intersections and internal deburring.
FAI reporting
Critical deep-hole features can be documented in First Article Inspection reports upon request.
Why CNCALPARTS
An aluminum-only partner for demanding bore geometry
General machine shops may treat aluminum as a secondary material, relying on generic tooling and settings. CNCALPARTS machines aluminum, and only aluminum.
This focus supports dedicated tooling inventories, coolant chemistry optimized for aluminum, and operator expertise in the material's deformation and stress-relief patterns. The result is a process built around deep-hole precision from the first setup through final inspection.
We Machine Aluminum.
Only Aluminum.
From prototype quantities of 1–10 pieces to batch production of 500+ pieces, our process can support your next development or production requirement.
Start your RFQ
Send your deep-hole requirements for engineering review
For an accurate quote and efficient manufacturing review, please provide your 3D model, technical drawing, material specification, quantity, and timeline.
Preferred model: STEP or STP
Drawing details: Hole tolerances, surface finish, and critical datum surfaces
Production range: Prototype to 500+ pieces
Request a quotation
Our engineering team will review your technical package.
Email: info@cncalparts.com
Address: