Precision Hole Machining for Custom Aluminum Components
Stable, repeatable hole machining for locating holes, dowel pins, bearing seats, hole arrays, and reamed bores. CNCALPARTS calibrates every process around the thermal and cutting characteristics of aluminum.
±0.01 mm
Hole diameter control
0.02 mm
Geometric control
Ø1.0 mm+
Hole diameter range
Ra 0.8–3.2
Surface finish in μm
Built around aluminum
We machine aluminum. Only aluminum.
Dedicated tooling, coolant delivery, fixturing, and process parameters help protect hole geometry from heat, deflection, and chip buildup.
Technical capabilities
Hole accuracy engineered into the process
Precise fitment for bearing housings, dowel pins, optical mounts, brackets, and industrial assemblies depends on more than nominal diameter. Our 3-axis, 4-axis, and 5-axis CNC processes are optimized for dimensional stability across production batches.
Diameter control
Hole diameter tolerances down to ±0.01 mm for demanding fits and bearing seats.
Geometric precision
Position, perpendicularity, and coaxiality controlled down to 0.02 mm.
Flexible hole sizes
From micro holes at Ø1.0 mm to large-diameter bores, matched to the part design.
Controlled finish
Ra 0.8–3.2 μm finishes support reliable seating for press-fit components and bearings.
Specialized processes
The right method for every hole type
We combine tool-path optimization, incremental drilling, reaming, boring, and multi-axis milling to meet internal surface and coordinate requirements.
Discuss your hole requirementsPrecision boring
High-accuracy diameter control and superior internal surface finish for bearing seats and motor housings.
Dowel and locating holes
Incremental drilling and reaming maintain exact alignment between mating components.
Complex hole arrays
Multi-axis CNC milling preserves hole-to-hole distance and coordinate accuracy across complex plates and brackets.
Tapping and threading
Clean, burr-free internal threads from M1.6 upwards, designed for reliable pull-out strength in aluminum alloys.
Aluminum-specific control
Preventing thermal drift, chip buildup, and taper
Aluminum can deform under heat and generate gummy chips during drilling. These variables can create tapered holes and inconsistent diameters when general-purpose methods are used.
Coolant delivery
Targeted coolant helps manage heat and evacuate chips from deep or intricate holes.
Carbide tooling
High-performance tooling supports edge stability and repeatable cutting conditions.
Matched parameters
Feed-to-speed ratios are tailored to thermal conductivity and the selected alloy.
Material expertise
Focused knowledge across key aluminum grades
By working exclusively with aluminum, our tooling inventory and machining parameters stay aligned with the material you specify.
Quality assurance
Inspection that verifies the CAD model
Precision holes are only as reliable as the verification process. Every batch is inspected using measurement methods selected for the feature, tolerance, and production volume.
Documentation available
Full inspection reports, First Article Inspection (FAI), and dimensional reports can be provided for qualified projects.
CMM inspection
Verifies complex hole patterns, position tolerances, perpendicularity, and coordinate relationships.
Bore and pin gauges
Provides repeatable diameter verification for critical features and high-volume production.
Thread gauges
Confirms go/no-go compliance for all specified internal threads.
Surface testers
Confirms internal finish on critical bores and seating surfaces.
Production readiness
Consistent from prototype to production
Validate the design
Our engineering team reviews STEP or IGES files and drawings to confirm hole tolerances and geometric requirements are manufacturable.
Stabilize every setup
Stable fixture setups keep hole positions identical across parts while design teams move through validation and refinement.
Repeat with control
Systematic workholding and tool management reduce downtime and support part-to-part repeatability at higher volumes.
Common questions
Plan your next precision hole project
Request a quote
Let’s review your precision hole requirements
Send your STEP or IGES files and technical drawings. Our engineering team will evaluate manufacturability, tolerance requirements, and production needs for your aluminum component.
Applications: robotics, automation, optics, and industrial equipment
Contact: info@cncalparts.com
Address:
Start your project conversation
Share your drawings, target quantities, and the hole features that matter most.