


machining and grinding finish symbol - grinding machining symbols
Nov 03 2008 · A Sheldon What you are describing is a common but obsolete way to express a grade of machining finish The idea was to represent rough or first machining operation by one …Surface Finish chart Theoretical Machinist . Finish Symbol N Finish Ra μinch Ra μm Super finishing 4 Triangles N1 1 0 025 Lapping N2 2 0 05 N3 4 0 1 Grinding 3 Triangles N4 8 0 2 N5 16 0 4 N6 32 0 8 Smooth Machining 2 Triangles N7 63 1 6 N8 125 3 2 Medium Machining N9 250 6 3 1 Triangle N10 500 12 5 Rough Machining N11 1000 nbsp
