以下是ISO規(guī)定的粗糙度數(shù)值及其等級表,,美國ANSI的數(shù)值及其等級與其相同。 4 r( X2 V1 g+ T! U, r P8 f
" m5 Z+ @7 P' \. W- w- d5 l
: e* N% ^( j$ \/ Q! o3 r: v粗糙度數(shù)值Ra .... .粗糙度等級數(shù) .... 粗糙度數(shù)值Ra .... 粗糙度等級數(shù) - X" c% b9 J( \: Q
μm(微米).μin(微英寸)..... ......μm(微米).μin(微英寸) ) K/ ^) w" R, v: e1 R3 {% l
50 ...... 2000 .....N12 ............0.8 ...... 32 ...... N6 0 c& k6 a% g4 {
25 ...... 1000 .....N11.............0.4 ...... 16 ...... N5 & Y$ x) w l+ ^3 {% F0 p! a' ~: U* Q
12.5.....500 ......N10.............0.2 ...... 8 ....... N4
7 J5 o( N! m* j2 _6.3......250 ......N9..............0.1 ...... 4 ....... N3 ' N7 Z9 T* _1 c) ?6 n, v
3.2......125 ......N8..............0.05 ..... 2 ....... N2 4 \. @3 @( w, c1 x
1.6......63 .......N7..............0.025 .... 1 ....... N1 |