steel balls | carbon steel balls | stainless steel balls from china
JINAN BALLS INDUSTRIAL CO., LTD     
Phone: +86 531 85950369; Fax:+:86 531 85061061    
E-Mail:wangxingyun20082403@hotmail.com    
Home About Us Products Technical Contact Us
 
   ANSI/AFBMA Std 10-1989
   Grade Standard
   Hardness Convertion
   ISO3290 Standard
   Manufacturing Process
   Materials Contrast
   Size & weight of steel balls
E-mail:wangxingyun@126.com
MSN:wangxingyun20082403@hotmail.com
Skype:wangxingyun2403
 
 
 
Location : Home >Technical
 
GB308-84 ISO 3290 - 1975 (E) Standard
    VDws Sph Ra
Grade Maximum Diameter
mm
Ball Dia. Variation
μm
Deviation From Spherical Form
μm
Surface Roughness
μm
3 12 0.08 0.08 0.012
5 12 0.13 0.13 0.02
10 25 0.25 0.25 0.025
16 25 0.4 0.4 0.032
20 38 0.5 0.5 0.04
28 38 0.7 0.7 0.05
40 50 1 1 0.08
100 all 2.5 2.5 0.125
200 all 5 5 0.2
 
Grade VDwL
Dia. Variation
μm
Gauge
Interval
μm
Preferred Gauge
μm
Subgauge
Interval
μm
Subgauge
μm
3 0.13 0.5 -5,-4.5,...,1,-0.5,0,+0.5,+1,...,+4.5,+5 0.1 -0.2,-0.1,0,+0.1,+0.2
5 0.25   -8,-7,...,-2,-1,0,+1,+2,...,+7,+8    
    1   0.2 -0.4,-0.2,0,+0.2,+0.4
10 0.5   -10,-9,...,-2,-1,0,+1,+2,...,+9,+10    
16 0.8        
20 1 2 -16,-14,...,-4,-2,0,+2,+4,...,+14,+16 0.4 -0.8,-0.4,0,+0.4,+0.8
28 1.4        
40 2 4 -20,-16,...,-8,-4,0,+4,+8,...,+16,+20 0.8 -1.6,-0.8,0,+0.8,+1.6
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,+6
 
 
Copyright © 2008 JINAN BALLS INDUSTRIAL CO., LTD