GRIT NO.
砂纸目数
USA FINISH #
美国光洁度号
COMMON
NAME
[USA] Ra
MICROINCH 美
国Ra μin
E/P RANGE
Ra MICROINCH
[UK] Ra
MICRON 英
国Ra μm
Rmax
MICROINCH
[JAPAN] Rmax
MICRON
APPROX. RMS
MICROINCH
ISO
NUMBER
ASTM STD
Ra MICROINCH
JAPANESE
STANDARD
2000 50 7875 200 N12
1000 25 3940 100 N11
500 12.5 1968 50 N10
60 #1 Mill Plate 250 50 Max. 6.3 985 25 N9 140 Max.
125 3.2 492 12.5 N8
80 #2 Satin Sheet 70 Max. 80
40 - 60
63 1.6 6.3 N7
100 - 120 #3 52 58
120 #4 Commercial #4 40 - 60 typ.
150 #4 3A Sanitary Finish 42 Max. 42 - 47 46 Max.
30 - 35
ANSI #4 Sanitary 32 0.8 126 3.2 N6
180 #4 30 Max. 15 - 20 34 25 Max. Buff #100
20 - 30
200 - 220 #4S Biothech Finish 25 Max.
20 - 25
240 #6 15 - 20 10 - 15 17 8 - 20
16 0.4 63 1.6 17 Max. N5 6 - 15
320 #7 12 Max.
8 - 12
12 0.3 42 1.5 13 - 14 Buff #200
8 0.2 31 0.8 8 N4 Buff #300
400 #8 Mirror Finish 4 - 8
500 #8 Supermirror Finish < 4
3 - 8
500 #8 Supermirror Finish 4 0.1 16 0.4 4 - 10 N3 Buff #400
2 0.06 8 0.2 N2
1 0.025 4 0.1 N1
↑
Common USA name.
ASTM A480.
SURFACE FINISH CROSS REFERENCE CHART
表
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