以下是ISO规定的粗糙度数值及其等级表,美国ANSI的数值及其等级与其相同。 $ j, R% c$ \& M7 q3 P& [; h" T
( I$ U d3 r; ?, ~3 N2 T
+ ?' x$ K S. Y9 ~ l! B- M粗糙度数值Ra .... .粗糙度等级数 .... 粗糙度数值Ra .... 粗糙度等级数
0 I, X3 u- k- f3 Q t [* ~0 }/ Eμm(微米).μin(微英寸)..... ......μm(微米).μin(微英寸) . J+ ^2 f, I6 q5 d% `5 j
50 ...... 2000 .....N12 ............0.8 ...... 32 ...... N6 ; U( S; j( {6 E: m- h j' U
25 ...... 1000 .....N11.............0.4 ...... 16 ...... N5 % @6 z( V0 k2 N8 @. _ k! s( x+ b
12.5.....500 ......N10.............0.2 ...... 8 ....... N4 , t, q, F/ A: S+ c4 ~5 r( w' B
6.3......250 ......N9..............0.1 ...... 4 ....... N3 ) e6 E' V! C4 Z8 C6 j
3.2......125 ......N8..............0.05 ..... 2 ....... N2
# s9 h% Y9 ?0 } P _1.6......63 .......N7..............0.025 .... 1 ....... N1 |