Graded Precision Steel Balls
Graded Precision Steel Balls
Sphere Engineers Pvt. Ltd. manufactures Precision Steel balls in various Grades from different raw material under stringent quality control from raw material stage to finish product stage to achieve desired Dimensional control and very fine surface finish. Precision Steel balls are manufactured for the application in Automotive Industries, Bearing Industries, Furniture Industries, Castor Wheel Industries and for many other applications.
Tolerance by grade – AFBMA standard
|
GRADE
|
INDIVIDUAL BALLS
|
LOTS OF BALLS
|
|||||||
|---|---|---|---|---|---|---|---|---|---|
|
-
|
Allowable Ball Diameter Tolerance (µm)
|
Allowable Deviation from Spherical form (µm)
|
Maximum Surface Roughness Arithmetical average (µm)
|
Allowable lot Diameter Variation (µm)
|
Basic Diameter Tolerance (µm)
|
Allowable Bal Gage Deviation (µm)
High & Low |
Container marking increment (µm)
|
||
|
3
|
0.08
|
0.08
|
0.012
|
0.13
|
±0.78
|
+0.75
|
-0.75
|
0.25
|
|
|
5
|
0.13
|
0.13
|
0.02
|
0.25
|
±1.25
|
+1.25
|
-1.00
|
0.25
|
|
|
10
|
0.25
|
0.25
|
0.025
|
0.5
|
±2.5
|
+1.25
|
-1.00
|
0.25
|
|
|
16
|
0.40
|
0.40
|
0.025
|
0.8
|
±2.5
|
+1.25
|
-1.00
|
0.25
|
|
|
24
|
0.60
|
0.60
|
0.05
|
1.2
|
±2.5
|
+2.5
|
-2.5
|
0.25
|
|
|
48
|
1.20
|
1.20
|
0.08
|
2.4
|
±5
|
NA
|
NA
|
1.25
|
|
|
100
|
2.50
|
2.50
|
0.125
|
5
|
±12.5
|
NA
|
NA
|
NA
|
|
|
200
|
5.00
|
5.00
|
0.20
|
10
|
±25
|
NA
|
NA
|
NA
|
|
|
500
|
13.00
|
13.00
|
NA
|
25
|
±50
|
NA
|
NA
|
NA
|
|
|
1000
|
25.00
|
25.00
|
NA
|
50
|
±125
|
NA
|
NA
|
NA
|
|
Note : Steel Balls in accordance with DIN 5401 & ISO 3290 are also possible.
