Surface Roughness Associated with Manufacturing Process

	Roughness Average
Manufacturing	Top Number - Micrometers
Process	Bottom Number - (Microinches)
	50 (2000)		25 (1000)		12.5 (500)		6.3 (250)		3.2 (125)		1.6 (63)		0.80 (32)		0.40 (16)		0.20 (8)		0.10 (4)		0.05 (2)		0.025 (1)		0.012 (.5)
Flame Cutting
Snagging
Sawing
Planing, Shaping
Drilling
Chemical Milling
Elect Discharge Machining
Milling
Broaching
Reaming
Electron Beam
Laser
Electro-Chemical
Boring, Turning
Barrel Finishing
	50 (2000)		25 (1000)		12.5 (500)		6.3 (250)		3.2 (125)		1.6 (63)		0.80 (32)		0.40 (16)		0.20 (8)		0.10 (4)		0.05 (2)		0.025 (1)		0.012 (.5)
Electrolytic Grinding
Roller Burnishing
Grinding
Honing
Electro-Polish
Polishing
Lapping
Super Finishing
Sand Casting
Hot Rolling
Forging
Permanent Mold Casting
Investment Casting
Extruding
Cold Rolling, Drawing
Die Casting
	50 (2000)		25 (1000)		12.5 (500)		6.3 (250)		3.2 (125)		1.6 (63)		0.80 (32)		0.40 (16)		0.20 (8)		0.10 (4)		0.05 (2)		0.025 (1)		0.012 (.5)

	Average Range
	Less Frequent