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Comparison table of accuracy and parameters of each machining process (casting/cutting/gear machining, etc.)
Comparison table of process accuracy and parameters
The accuracy that can be achieved by various processing methods is summarized as follows (Note: The accuracy range is affected by processing conditions, materials and economy, the following is the typical economic accuracy):
▶turning
Economic accuracy: IT8~IT7 (fine car up to IT6~IT7)
Surface Roughness: Ra 1.6~0.8 μm (Fine Turning)
▶Milling
Economic accuracy: IT8~IT7
Surface Roughness: Ra 6.3~1.6 μm (Finish Milling)
Flatness tolerance: Fine milling can reach IT8 level
▶ Plane.pare
Economic accuracy: IT9~IT7
Surface roughness: Ra 6.3~1.6 μm
Straightness/flatness tolerance: fine planing up to IT8 level
▶Grinding.
Economic accuracy: IT8~IT5 (fine grinding IT6~IT7, fine grinding IT5~IT6)
Surface Roughness: Ra 1.25~0.16 μm (Fine Grinding)
Ultra-precision grinding: up to the nanometer level (10⁻¹~10³ nm)
▶drill
Economic Precision: IT11~IT12 (Coarse Drill)
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