MS Precision - Surface Roughness Conversion Chart　表面光洁度对照表

Surface Roughness Conversion Chart　表面光洁度对照表

Ra	Ra	v	CLA	Rt	N	Cut off Length
mirco-meter	micro-inches		(N)			in.	mm
0.025	1	1.1	1	0.3	1	0.003	0.08
0.05	2	2.2	2	0.5	2	0.01	0.25
0.1	4	4.4	4	0.8	3	0.01	0.25
0.2	8	8.8	8	1.2	4	0.01	0.25
0.4	16	17.6	16	2.0	5	0.01	0.25
0.8	32	32.5	32	4.0	6	0.03	0.8
1.6	63	64.3	63	8.0	7	0.03	0.8
3.2	125	137.5	125	13	8	0.1	2.5
6.3	250	275	250	25	9	0.1	2.5
12.5	500	550	500	50	10	0.1	2.5
25	1000	1100	1000	100	11	0.3	8.0
50	2000	2200	2000	200	12	0.3	8.0