Milling Processes & Special Operations
A. Core Milling Operations
Face Milling: Large surface area finishing, squaring operations
Peripheral Milling: Slotting, profiling, contour machining
Pocket Milling: Shallow and deep pocketing, cavity creation
Contour Milling: 2D and 3D surface profiling
Drilling/Tapping: Precision hole making, thread creation
Boring: High-precision hole sizing and finishing
Thread Milling: Internal and external thread creation
B. Advanced Machining Techniques
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Technique
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Description
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Applications
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Benefits
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High-Speed Machining
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High spindle speeds with reduced chip loads
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Aluminum, graphite, plastics
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Reduced cycle times, improved surface finish
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Hard Milling
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Machining materials >45 HRC directly
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Tool steels, hardened steels
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Eliminates EDM, better surface integrity
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Trochoidal Milling
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Constant engagement circular tool paths
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Deep slots, difficult materials
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Reduced tool wear, higher material removal
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Micro-Milling
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Small tools (<1mm diameter)
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Medical devices, micro-optics, electronics
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Precision small features, fine details
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5-Axis Simultaneous
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Continuous tool orientation control
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Turbine blades, impellers, complex geometries
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Single setup completion, complex contours
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C. Tooling & Cutting Technology
Tool Materials: Carbide (various grades), CBN, PCD, diamond-coated, HSS
Tool Holding Systems: HSK, BT, CAT with hydraulic, thermal, or mechanical clamping
Cutting Tool Types: End mills (flat, ball, corner radius), face mills, slot cutters, drills, taps
Coolant Systems: High-pressure through-spindle (70-200 bar), minimum quantity lubrication, cryogenic options
Tool Management: Presetters, in-machine probing, automatic tool changers (30-200+ tools)
5. Secondary Operations & Finishing
A. Value-Added Services
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Operation
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Equipment/Process
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Capability
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Typical Tolerances
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CNC Turning
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Live tooling on mills, separate lathes
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Turning features on milled parts
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±0.01mm
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Grinding
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Surface, cylindrical, jig grinders
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Precision flatness, parallelism, size
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±0.002mm
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EDM
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Wire and sinker EDM
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Complex geometries, hard materials
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±0.005mm
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Heat Treatment
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Vacuum furnaces, atmosphere controlled
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Hardening, tempering, stress relief
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Material dependent
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Welding
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TIG, laser, electron beam
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Component assembly, repair
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±0.05mm after weld
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Assembly
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Press fits, adhesive, fastening
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Multi-component assemblies
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As per drawing
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B. Surface Finishing Options
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Finish Type
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Process Method
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Surface Ra (μm)
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Characteristics & Applications
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As-Machined
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Standard CNC milling
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0.8-3.2
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Cost-effective, visible tool marks, general applications
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Bead Blasting
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Glass bead, aluminum oxide
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0.8-1.6
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Matte finish, uniform appearance, stress relief
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Polishing
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Mechanical, chemical, electro
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0.025-0.4
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Reflective, smooth, food, medical, optical
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Anodizing
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Type I-III, hardcoat (Al)
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Base material dependent
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Decorative, corrosion resistant, wear resistant
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Plating
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Nickel, chrome, zinc, tin
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Varies
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Corrosion protection, appearance, solderability
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Powder Coating
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Electrostatic application
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N/A (coating)
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Durable, color options, corrosion protection
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Passivation
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Nitric or citric acid (SS)
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Base material finish
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Corrosion resistance restoration
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Laser Marking
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Fiber, YAG lasers
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N/A (marking)
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Permanent identification, serialization, logos
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Tumbling/Vibratory
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Media finishing
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0.4-1.6
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Deburring, edge breaking, surface smoothing
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Target Industries & Applications
Aerospace & Defense
Components: Structural frames, brackets, housings, turbine components, fittings
Materials: Aluminum (2024, 7075), titanium, Inconel, high-strength steels
Standards: AS9100, NADCAP (machining), MIL specifications, customer-specific
Critical Requirements: Fatigue resistance, weight optimization, documentation, traceability
Medical & Life Sciences
Components: Surgical instruments, implantable devices, diagnostic equipment, prosthetics
Materials: 316L stainless, titanium (Grade 5, 23), PEEK, cobalt-chrome
Requirements: Biocompatibility, cleanroom manufacturing, sterilization compatibility
Regulations: FDA compliance, ISO 13485, USP Class VI testing where applicable
Automotive & Motorsports
Components: Engine parts, transmission housings, suspension components, brackets
Materials: Aluminum, various steels, brass, magnesium (racing)
Production Volumes: Prototype to high-volume (10,000+ parts)
Special Capabilities: JIT delivery, kanban systems, production line support
Electronics & Semiconductor
Components: Enclosures, heat sinks, wafer handling, test fixtures, connector bodies
Materials: Aluminum, copper, engineering plastics, composites
Precision Requirements: Often ±0.005mm or better, micron-level flatness
Cleanliness: ESD-safe materials, particulate control, specialized cleaning
Industrial Machinery & Automation
Components: Machine frames, brackets, guides, robotic components, fixture
Materials: Carbon steel, aluminum, stainless, cast iron
Requirements: Wear resistance, dimensional stability, rigidity
Capabilities: Large part machining, weldment preparation, assembly interfaces
