Design by GTUT, B2BManufactures

TEL : 886-3-5596105
FAX : 886-3-5593732
ADD : 453,SUN-KEN VILLEGE HSIN-FONG
HSIANG HSINCHU TAIWAN R.O.C.
E-MAIL : ysl.ysl4814@msa.hinet.net
Chemical Analysis of Material
JIS AISI CHEMICAL COMPOSITION% (MAX)
C Si Mn P S Ni Cr Al
SUJ-2 AISI52100 0.95~1.10 0.15~0.35 0.50 0.025 0.025 1.30~1.60
SUS-304 AISI 304 0.03 0.20~0.10 2.0 0.45 3.3 12.0 19.0
SWRCH 15A SAE 1015 0.13~0.18 0.10 0.30~0.60 0.03 0.035 0.02
SWRCH 18A SAE 1018 0.15~0.20 0.10 0.30~0.60 0.03 0.035 0.02
HRC Carbon Steel Ball
SIZE CRUSHING Kgf HARDNESS HRC
inch mm YSL JIS AFBMA
1/8" 3.175 500 500 364 56.0~60.5
5/32" 3.969 800 800 568 57.0~61.5
3/16" 4.763 1100 1100 818 57.5~62.0
7/32" 5.556 1400 1400 1400 58.0~62.0
1/4" 6.350 2000 1800 1455
9/32" 7.144 2200 2200 1841 59.5~63.5
5/16" 7.938 2700 2700 2150
Chrome Steel Ball
SIZE CRUSHING Kgf HARDNESS HRC
inch mm MEASUREMENT STANDARD
1/8" 3.175 85.9 × DIAMETER1.773 666 56~60.5
5/32" 3.969 990 57~61.0
3/16" 4.763 1370 57.5~62.0
7/32" 5.556 1800 58~62
1/4" 6.350 2280
9/32" 7.144 2810 59.5~63.5
5/16" 7.938 3380
Grade and Tolerance
SIZE
mm/inch
Grade Stardard Lot diameter Variation  VDwl (max.) Ball diameter Variation  VDms (max.) Surface  Roughness Ra  (max.)
2
2.54
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
9
1/16" GRADE
40
YSL
JIS
AFBMA
1
1
2.032
1.0
1.0
1.016
0.08
5/64"
3/32"
7/64 GRADE
50
YSL
JIS
AFBMA
1.2
1.2
2.54
1.2
1.2
1.27
0.08
1/8"
9/64"
5/32" GRADE
60
YSL
JIS
AFBMA
3
3
3.048
1.5
1.5
1.524
0.095
11/64"
3/16"
7/32" GRADE
100
YSL
JIS
AFBMA
5
5
5.08
2.5
2.5
2.54
0.125
1/4"
17/64"
9/32" GRADE
200
YSL
JIS
AFBMA
10
10
15.24
5
5
7.62
0.2
5/16"
11/32"
3/8"
Measurement Conversion Table
DIAMETER   
mm
Inches weight     
pcs 1000    
Balls KGs
weight     
One Gross    
Balls KGs
0.397 1/64" 0.00026 0.00000374
0.500 ----- 0.00051 0.0000734
0.794 1/32" 0.0021 0.000303
1.000 ----- 0.0041 0.000590
1.190 3/64" 0.0073 0.00105
1.588 1/16" 0.0164 0.00236
2.000 ----- 0.0326 0.00469
2.381 3/32" 0.0560 0.00806
2.560 ----- 0.0638 0.00919
2.778 7/64" 0.0825 0.2119
3.000 ----- 0.1103 0.0159
3.175 1/8" 0.1301 0.0187
3.500 ----- 0.1762 0.0254
3.969 5/32" 0.2553 0.0368
4.000 ----- 0.2630 0.0379
4.500 ----- 0.3745 0.0539
4.763 3/16" 0.4412 0.0635
5.000 ----- 0.5138 0.0740
5.500 ----- 0.6838 0.0985
5.556 7/32" 0.7028 0.1202
6.000 ----- 0.8878 0.1278
6.350 1/4" 1.045 0.1470
6.500 ----- 1.129 0.1626
7.000 ----- 1.409 0.2029
7.144 9/32" 1.498 0.2157
7.500 ----- 1.734 0.2497
7.938 5/16" 2.056 0.2961
8.000 ----- 2.104 0.3030
8.500 ----- 2.524 0.3635
8.731 11/32" 2.658 0.3828
9.000 ----- 2.996 0.4314
9.525 3/8" 3.554 0.5118
10.000 ----- 4.110 0.5918
10.319 13/32" 4.434 0.6385
11.000 ----- 5.471 0.7878
11.113 7/16" 5.641 0.8123
11.906 15/32" 6.931 0.9981