Surface finishes 면조도표 (VDI <-> Ra <-> Ry)alex

Surface finishes
VDI 3400	Ra = CLA = AA	Class	Ry
CH
0	0.10	4	0.7
1	0.11	4.4
2	0.12	4.8
3	0.14	5.6
4	0.16	6.4
5	0.18	7.2
6	0.20	8
7	0.22	8.8
8	0.25	10
9	0.28	11.2
10	0.32	12.8	2.0
11	0.35	14
12	0.40	16
13	0.45	18
14	0.50	20	2.8
15	0.56	22.4	3.5
16	0.63	25.2
17	0.70	28
18	0.80	32
19	0.90	36	5.2
20	1.00	40
21	1.12	44.8
22	1.26	50.4
23	1.40	56	8.8
24	1.62	63	9.5
25	1.80	72
26	2.00	80
27	2.20	88
28	2.50	100
29	2.80	112
30	3.20	125
31	3.50	140	14.6
32	4.00	160
33	4.50	180
34	5.00	200	25.3
35	5.60	224
36	6.30	250
37	7.00	280	30.6
38	8.00	320
39	9.00	360
40	10.0	400
41	11.2	448
42	12.6	500	51.6
43	14.0	560
44	16.0	640
45	18.0	720