These representative CNC machining case studies show how Leland supports engineers, purchasing teams and product developers with material selection, DFM review, precision machining, finishing and inspection. Project details are generalized to protect customer drawings and confidentiality.
Representative CNC Machining Case Studies
1. Aluminum 6061 Aerospace Equipment Housing
Requirement: A lightweight aluminum housing with multiple pockets, threaded holes and cosmetic anodized surfaces for aerospace-related equipment.
- Material: Aluminum 6061-T6
- Process: CNC milling, drilling, tapping, deburring and anodizing
- Challenge: Maintaining flatness and hole position across multiple machined faces
- Solution: Reviewed fixture strategy before production, separated cosmetic and functional surfaces, and inspected critical threaded features after finishing
- Result: Stable prototype-to-small-batch production with clean anodized appearance and controlled assembly features
2. PEEK Medical Device Component
Requirement: A precision PEEK part requiring tight dimensional stability, clean edges and material traceability for a medical device development project.
- Material: PEEK engineering plastic
- Process: CNC milling, drilling, fine deburring and dimensional inspection
- Challenge: Avoiding deformation and burrs while holding functional dimensions
- Solution: Controlled clamping pressure, used sharp tooling, planned gradual machining steps and inspected critical dimensions after stress-relief time
- Result: Functional prototypes suitable for assembly and engineering evaluation
3. Semiconductor Equipment Fixture
Requirement: A precision fixture plate for semiconductor-related equipment with hole patterns, flatness requirements and surface treatment needs.
- Material: Aluminum or engineering plastic depending on application
- Process: CNC milling, boring, tapping, surface finishing and inspection
- Challenge: Maintaining hole location accuracy and reducing assembly risk
- Solution: Checked the 2D drawing against the STEP file, confirmed datum references and created an inspection plan around critical hole positions
- Result: Fixture components delivered with documented dimensional checks for assembly review
4. Stainless Steel Precision Shaft
Requirement: A stainless steel shaft with stepped diameters, threads, grooves and controlled surface finish for industrial automation equipment.
- Material: Stainless steel 304 or 316L
- Process: CNC turning, threading, grooving, polishing and inspection
- Challenge: Controlling concentricity and surface quality across several turned features
- Solution: Planned turning sequence around datum features and inspected diameters, thread fit and groove dimensions before shipment
- Result: Repeatable turned components ready for mechanical assembly
5. Brass Connector and Threaded Adapter
Requirement: A brass connector with internal threads, sealing surfaces and clean external finish for an instrumentation or fluid-control application.
- Material: Brass
- Process: CNC turning, drilling, tapping, deburring and optional plating
- Challenge: Preventing burrs in threaded and sealing areas
- Solution: Added deburring control after thread machining and inspected the sealing surface before packing
- Result: Clean machined brass parts with consistent thread quality and assembly-ready finish
6. Sheet Metal Equipment Enclosure
Requirement: A fabricated sheet metal enclosure with laser-cut openings, bends, mounting holes and powder-coated finish for an equipment assembly.
- Material: Aluminum, stainless steel or carbon steel sheet
- Process: Laser cutting, bending, tapping, welding or hardware insertion, powder coating
- Challenge: Keeping bend features, hole alignment and visible surfaces consistent after finishing
- Solution: Reviewed bend radius, flat pattern, hardware clearance and coating requirements before production
- Result: Functional enclosure parts ready for installation and final assembly
What These Projects Have in Common
- Drawing and STEP file review before quotation
- Material and process selection based on function, tolerance and quantity
- DFM feedback to reduce machining risk and cost
- Inspection focused on critical dimensions, threads, holes and assembly features
- Finishing and secondary operations coordinated when required
How To Start a Similar Project
Send your 2D drawing, STEP file, material requirement, quantity, surface finish and any critical inspection notes. Leland will review manufacturability, suggest practical improvements and provide a quotation based on your project requirements.
Need help with a custom CNC part? Upload your drawing through the quote page and our engineering team will review it.