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Add:Wenzhou longwan shacheng yongfu puhedonglu 21.
Zip:325025
Tel:0577-86813988 86821988 86810711 86995298
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Web:www.pewrjl.cn
E-mail:master@chinahaixing.com
Director:Zhongjie Lin |
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Rolling bearings steel ball Rolling Bearing Balls
GB308-89 ISO3290-1998(E)
STANDARD
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Precision grades
Grade |
Batch diameter changes
VDWL LOt Dia Variation |
Customs value interval
Gauge Interval |
Common customs value
Preferred Gauge |
Regulatory points. Value
Subgauge Interval |
2 Points customs value
Su1bgauge |
μm |
3 |
0.13 |
0.5 |
-5,......,-0.5,0,+0.5......,+5 |
0.1 |
-0.2,-0.1,0,+0.1,+0.2 |
5 |
0.25 |
1 |
-5,......,-1,0,+1......,+5 |
0.2 |
-0.4,-0.2,0,+0.2,+0.4 |
10 |
0.5 |
1 |
-9,......,-1,0,+1......,+9 |
0.2 |
-0.4,-0.2,0,+0.2,+0.4 |
16 |
0.8 |
2 |
-10,......,-2,0,+2......,+10 |
0.4 |
-0.8,-0.4,0,+0.4,+0.8 |
20 |
1 |
2 |
-10,......,-2,0,+2......,+10 |
0.4 |
-0.8,-0.4,0,+0.4,+0.8 |
28 |
1.4 |
2 |
-12,......,-2,0,+2......,+12 |
0.4 |
-0.8,-0.4,0,+0.4,+0.8 |
40 |
2 |
4 |
-16,......,-4,0,+4......,+16 |
0.8 |
-1.6,-0.8,0,+0.8,+1.6 |
60 |
3 |
5 |
-20,......,-5,0,+5......,+20 |
1 |
-2,-1.0,0,+1,+2 |
100 |
5 |
10 |
-40,......,-10,0,+10......,+40 |
2 |
-4,-2.0,+2,+4 |
200 |
10 |
15 |
-60,......,-15,0,+15......,+60 |
3 |
-6,-3.0,+3,+4 |
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Precision grades
Grade |
Ball diameter changes
VDWS Ball Dia.Variation |
Spherical error
△sph Deviation From spherical Foem |
The surface roughness Ra
Surface Roughness |
No overtime No Larger Than |
um |
3 |
0.08 |
0.08 |
0.010 |
5 |
0.13 |
0.13 |
0.014 |
10 |
0.25 |
0.25 |
0.020 |
16 |
0.4 |
0.4 |
0.025 |
20 |
0.5 |
0.5 |
0.032 |
28 |
0.7 |
0.7 |
0.050 |
40 |
1 |
1 |
0.060 |
60 |
1.5 |
1.5 |
0.080 |
100 |
2.5 |
2.5 |
0.100 |
200 |
5 |
5 |
0.150 |
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Precision grades Grsde |
G20 |
G16 |
G10 G5 G3 |
Precision grades Vibration |
Ball diameter Diameter |
DM(mm)
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Z1 |
Z2 |
Z3 |
More than Over |
TO |
average
Average |
A single value
Max |
average
Average |
A single value
Max |
average
Average |
A single value
Max |
4.5 |
6.5 |
39.5 |
41.5 |
37.5 |
39.5 |
35.5 |
37.5 |
6.5 |
7.5 |
40 |
42 |
38 |
40 |
36 |
38 |
7.5 |
10 |
40.5 |
42.5 |
38.5 |
40.5 |
36.5 |
38.5 |
10 |
11 |
42 |
44 |
40.5 |
42.5 |
38.5 |
40.5 |
11 |
12 |
42.5 |
44.5 |
41 |
43 |
39 |
41 |
12 |
13 |
43 |
45 |
41.5 |
43.5 |
39.5 |
41.5 |
13 |
14 |
43.5 |
45.5 |
42 |
44 |
40 |
42 |
14 |
15 |
44 |
46 |
42.5 |
44.5 |
40.5 |
42.5 |
15 |
16 |
44.5 |
46.5 |
42.5 |
44.5 |
40.5 |
42.5 |
16 |
17 |
45 |
47 |
43 |
45 |
41 |
43 |
17 |
17.5 |
45.5 |
47.5 |
43 |
45 |
41 |
43 |
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