sales@dspballs.in E-373, Mayur Vihar, Phase-II

Quality Grade

ISO 3290 – STANDARD GRADES & TOLERANCES ( INDIAN. STANDARDS )

ISO- 3290
GRADE
BASIC DIA
TOLERANCE

LOT VARIATION

ALLOWABLE GAUGE INTERVAL

SUB
GAUGE

SUB GAUGE INTERVAL

BALL-DIA
VARIATION

DEVIATION FROM
SPHERICAL FORM

SURFACE
ROUGHNESS

3
+ 5
0.13
0.500
0.2
0.1
0.08
0.080
0.012
5
+ 5
0.25
1.000
0.4
0.2
0.13
0.130
0.020
10
+ 9
0.50
1.000
0.4
0.2
0.25
0.250
0.025
16
+10
0.80
2.000
0.8
0.4
0.40
0.400
0.032
20
+10
1.00
2.000
0.8
0.4
0.50
0.500
0.040
28
+12
1.40
2.000
0.8
0.4
0.70
0.700
0.050
40
+16
2.00
4.000
1.6
0.8
1.00
1.000
0.080
100
+40
5.00
10.000
4.0
2.0
2.50
2.500
0.125
200
+60
10.00
15.000
6.0
3.0
5.00
5.000
0.200
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