Page 1652 - MiSUMi 2025

[Technical Data]
Roughness Ranges by Various Processes

Arithmetic Average Roughness 0.025 0.05 0.1 0.2 0.4 0.8 1.6 3.2 6.3 12.5 25 50 100
Ra
25
Maximum Height 0.1 －S 0.4 －S 1.6 －S 6.3 12.5 －S －S 100 200 400
0.8
0.2
3.2
50
Traditional Roughness Notations Reference Value of 0.25 0.8 2.5 8 25
－S
－S
Rmax.
－S
－S
－S
－S
－S
－S
Standard Length
(mm)
Finish Symbol △ △ △ △ △ △ △ △ △ △ －
Forging Precise
Casting Precise
Die Casting
Hot Rolling
Cold Rolling
Drawing
Extruding
Tumbling
Sand Blasting
Rolling
Face Milling Precise
Planing
Carving / Slotting
Milling Precise
Precision Boring
Filing Precise
Processes Round Turning Precise Fine Medium Coarse
Precise
Boring
Drilling
Reaming Precise
Broaching Precise
Shaping
Polishing Precise Fine Medium Coarse
Honing Precise
Stone Lapping Precise
Buff Finishing Precise
Fine Sanding Precise
Lapping Precise
Hydro Honing Precise
Burnishing
Roller Finishing
Sinker EDM
Wire Cut, EDM
Chemical Polishing Precise
Electropolishing Precise

B-007