Grade inspection standard

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--Grade inspection standard--

--Grade and Tolerance--

Grade	Standard	Lot diameter variation Vdl (maximum)	Ball diameter variation Vds (maximum)	Surface roughness Ra (maximum)
20	YSL JIS AFBMA	1 1 1.016	0.5 0.5 0.508	0.04
40	YSL JIS AFBMA	2 2 2.032	1 1 1.016	0.08
50	YSL JIS AFBMA	2.5 2.5 2.54	1.2 1.2 1.27	0.08
60	YSL JIS AFBMA	3 3 3.048	1.5 1.5 1.524	0.095
100	YSL JIS AFBMA	5 5 5.08	2.5 2.5 2.54	0.125
200	YSL JIS AFBMA	10 10 10.16	5 5 5.08	0.2
500	YSL JIS AFBMA	25 25 25.4	13 13 12.7	__
1000	YSL JIS AFBMA	50 50 50.8	25 25 25.4	__
2000	YSL JIS AFBMA	100 100 101.6	50 50 50.8	__

Steel Balls Crushing Test, Hardness, Grade Speeification Chart

Grade	Diameter	Sphericity	Lot Diameter Variation	Grade	Diameter Variation	Sphericity	Lot Diame Variation
10	± 1.016	0.254	0.508	600	± 60.96	15.24	30.48
20	± 2.032	0.508	1.016	700	± 71.12	17.72	35.56
30	± 3.048	0.762	1.524	800	± 81.28	20.32	40.46
40	± 4.064	1.016	2.032	900	± 91.44	22.86	45.72
50	± 5.08	1.27	2.54	1000	± 101.6	25.4	50.8
60	± 6.096	1.524	3.048	1100	± 111.76	27.94	55.88
70	± 7.112	1.778	3.556	1200	± 121.92	30.48	60.96
80	± 8.128	2.032	4.064	1300	± 132.08	33.02	66.04
90	± 9.144	2.286	4.572	1400	± 142.24	35.56	71.12
100	± 10.16	2.54	5.08	1500	± 152.4	38.1	76.2
200	± 20.32	5.08	10.16	1600	± 162.56	40.64	81.28
300	± 30.48	7.62	15.24	1700	± 172.72	43.18	86.36
400	± 40.64	10.16	20.32	1800	± 182.88	45.72	91.44
500	± 50.8	12.7	25.4	2000	± 203.2	50.8	101.6

Steel Ball Diameler	Crushing Kgf	H.R.C
1/8"	A: 666KG　　B: 500KG	56-
5/32"	A: 990KG　　B: 800KG	57-
3/16"	A: 1370KG　　B: 1100KG	57.5-
7/32"	A: 1800KG　　B: 1400KG	58-
1/4"	A: 2280KG　　B: 2000KG	58-
9/32"	A: 2810KG　　B: 2300KG	59.5-
5/16"	A: 3380KG　　B: 2300KG	59.5-

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Yuan Sheng Loo Machinery Co.,Ltd
453,SUN-KEN VILLEGE HSIN-FONG
HSIANG HSINCHU TAIWAN R.O.C.
TEL : 886-35-596105~9
FAX : 886-35-593732
This page was last updated on 1999/10/01 10:28:14 AM
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