Stainless Steel Materials (Milling-Suitable Only)
For CNC milling, only stainless steel grades with stable machinability are used:
Stainless Steel 303 – optimized for machining efficiency
Stainless Steel 304 – general mechanical and structural use
Stainless Steel 316 / 316L – corrosion-critical environments
Stainless Steel 420 – hardness and wear-resistant parts
Material selection depends on machining behavior, strength, and service environment.
CNC Milling Process Scope
Stainless steel milling parts are manufactured through controlled CNC operations:
3-axis CNC milling
4-axis positioning milling
Multi-face machining in one setup
Pocket milling, contour milling, slotting
Drilling and tapping as secondary operations
Typical tolerance: ±0.02 – ±0.05 mm (depending on part geometry)
Surface Condition & Finishing
Surface finishing is chosen to protect machined surfaces and meet functional needs:
As-milled finish
Brushed surface
Polished surface
Passivation for corrosion resistance
Sandblasting
Nickel or chrome plating (if required)
All surface treatments are applied after dimensional verification.
CNC Milling Equipment
Machining accuracy relies on stable equipment and fixtures:
Precision CNC milling machines
Rigid machining centers
Stainless-steel-specific cutting tools
Dedicated fixtures for repeat production
Equipment selection is based on geometry and accuracy, not output speed.
Inspection & Measuring Equipment
Dimensional accuracy is verified using:
Digital calipers and micrometers
Height gauges
Thread gauges
Optical projectors
Flatness and perpendicularity inspection tools
Inspection focuses on functional and assembly-critical dimensions.
Quality Control Logic
Quality control emphasizes machining consistency rather than appearance:
Raw material verification
In-process dimensional checks
Final inspection before packing
Batch traceability for repeat orders
Typical Applications
Stainless steel milling parts are commonly used in:
Industrial equipment components
Mechanical mounting plates
Automation and fixture parts
Structural brackets and supports
Medical and laboratory equipment
Precision assemblies requiring flat reference surfaces
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