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Metal Grinding & Polishing Services

鉁 Professional Consulting Team 鉁 Fast Prototyping (1-2 weeks) 鉁 Automated & Smart Manufacturing 鉁 Easy Shipping (EXW, FOB, CIF, DDP) 鉁 Global Markets Served

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What is Grinding? Grinding is a precision machining process that uses abrasive wheels or belts to remove material from a workpiece, achieving tight tolerances, accurate dimensions, and controlled surface finishes.
It is widely used in metal grinding services for components that require high dimensional accuracy, such as shafts, molds, and precision CNC parts.

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Surfacegrinding machine sheet metal
What is Polishing? Polishing is a surface finishing process that smooths and refines a material surface to achieve low roughness, high gloss, and enhanced visual appearance.
It is commonly used in metal polishing services for applications where aesthetics, corrosion resistance, and surface quality are critical.

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Metal polishing surfacefinishing result
Surface Treatment Comparison
ProcessPurposeAchievable Roughness Ra (渭m)Dimensional PrecisionAppearance
Grinding (Cylindrical/Surface)Precision material removal + finish0.2鈥0.8 typical; 0.05 superfinishing卤0.002鈥撀0.01 mmMatte / brushed
Polishing (Mechanical/Buffing)Surface smoothing / aesthetic0.05鈥0.4 (mirror 鈮 0.1)Negligible dimensional changeHigh gloss / mirror
Electrolytic PolishingSmoothing + corrosion improvement0.05鈥0.4Removes ~10鈥40 渭m uniformlyHigh gloss
Sandblasting / Bead BlastingSurface texturing / cleaning1.6鈥6.3 (texture dependent)Does not control dimensionsMatte / uniform texture
Anodizing (Type II/III)Surface protection + color (aluminum)Inherits substrate (~0.4鈥1.6)Adds 5鈥50 渭m layerColored / matte / satin
Mirror PolishingHighest-gloss finish鈮 0.1 (Ra 鈮 0.025 on hard chrome)Negligible material lossMirror
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How Does Metal Grinding and Polishing Work?

Grinding Process Rough grinding 鈥 remove excess material
Precision grinding 鈥 achieve tight tolerances
Surface grinding / cylindrical grinding
Polishing Process Pre-polishing (semi-finishing)
Fine polishing
Mirror polishing (Ra 鈮 0.2 渭m)
Grinding Types Surface Grinding
Cylindrical Grinding
Centerless Grinding
Tool & Cutter Grinding
Polishing Types Mechanical Polishing
Electrolytic Polishing
Buff Polishing
Mirror Polishing

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Why Choose STARWAY MFG GROUP
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Grinding and Polishing Materials

Stainless Steel Grades: 304, 316
Features: High strength, corrosion resistance
Applications: Enclosures, brackets, food-grade

Carbon Steel Grades: Q235, SPCC

Aluminum Grades: 5052, 6061

Copper & Brass Features: Excellent conductivity, aesthetic

Galvanized Steel Tensile Strength: 270 鈥 500 MPa
Yield Strength: 140 鈥 300 MPa
Elongation: 20 鈥 38%

Cold Rolled Steel (CRS) Tensile Strength: 300 鈥 550 MPa

Hot Rolled Steel (HRS) Tensile Strength: 370 鈥 700 MPa

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