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Surface Roughness Produced by Common Production Methods per Machinery's Handbook (25th Edition, pg 708)

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There are many things to explore when choosing among manufacturing processes for your metal product(s). The chart below provides surface roughness values produced by common processing methods and is intended to be used as a general guideline. The ability of a processing operation to produce a specific surface roughness depends on many factors. For example, in surface grinding, the final surface depends on the peripheral speed of the wheel, the speed of the traverse, the rate of feed, the grit size, bonding material and state of dress of the wheel, the amount and type of lubrication at the point of cutting, and the mechanical properties of the workpiece being ground. A small change in any of the above factors can have an impact on the final surface that is produced.

50 25 12.5 6.3 3.2 1.6 0.80 0.40 0.20 0.10 0.05 0.025 0.012 μ m
PROCESS (2000) (1000) (500) (250) (125) (63) (32) (16) (8) (4) (2) (1) (0.5) (μ in)
Flame Cutting                        
Sawing                        
Planing, Shaping                        
Drilling                        
Elec. Discharge Mach.                          
Milling                        
Broaching                        
Reaming                        
Laser                        
Boring, Turning                        
Roller Burnishing                        
Grinding                        
Honing                        
Polishing                        
Lapping                        
Superfinishing                        

KEY:

Less Frequent Application =
Average Application =

The ranges shown above are typical of the process listed. Higher or lower values may be obtained under special conditions.

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