ABMA
Grade |
Round
DIA Toler
Per Ball |
Uniformity
DIA Toler
Per Unit
Container |
Basic
DIA
Toler |
Marking
Increment |
Surface
Roughness in
Micro-inches |
| 3 |
.000003"
(.08) |
.000005"
(.13) |
±.000030"
(±.75) |
.000010
(.25) |
0.5
(0.012) |
| 5 |
.000005"
(.13) |
.000010"
(.25) |
+.000050/-.000040
(+1.25/-1) |
.000010
(.25) |
0.8
(0.02) |
| 10 |
.000010"
(.25) |
.000020"
(.5) |
+.000050/-.000040
(+1.25/-1) |
.000010
(.25) |
1.0
(0.025) |
| 16 |
.000016"
(0.4) |
.000032"
(.8) |
+.000050/-.000040
(+1.25/-1) |
.000010
(.25) |
1.0
(0.025) |
| 24 |
.000024"
(0.6) |
.000048"
(1.2) |
±.0001"
(±2.5) |
.000010
(.25) |
2.0
(0.05) |
| 48 |
.000048"
(1.2) |
.000096"
(2.4) |
±.0002"
(±5) |
.000050
(1.25) |
3.0
(0.08) |
| 100 |
.000100"
(2.5) |
.0002"
(5) |
±.0005"
(±12.5) |
* |
5.0
(0.125) |
| 200 |
.000200"
(5) |
.0004"
(10) |
±.001"
(±25) |
* |
8.0
(0.2) |
| 500 |
.0005"
(13) |
.0010"
(25) |
±.002"
(±50) |
* |
* |
| 1000 |
.0010"
(25) |
.0020"
(50) |
±.005"
(±125) |
* |
* |
| * Not Applicable |
(microns) |
|
ITI
Valve Grades |
Roundness
DIA Toler
Per Ball |
Basic
DIA
Toler |
Surface
Roughness in
Micro-inches |
| 48V |
.000048" |
±.001" |
3.0 |
| 100V |
.0001" |
±.002" |
5.0 |
| 200V |
.0002" |
±.003" |
8.0 |
| 500V |
.0005" |
±.005" |
* |
| * Not Applicable |
| Balls used in valves usually require close control of roundness and surface finish to insure leak-tight operation. Size variations, however, are not usually critical. The ITI valve ball grades above have been established to complement the ABMA grades for industries using balls for valves and related applications. |
|
ITI
Plastics |
Roundness
DIA Toler |
Basic
DIA
Toler |
| 500P |
.0005" |
±.001" |
| 1000P |
.001" |
±.002" |
| 2000P |
.002" |
±.003" |
| 3000P |
.003" |
±.005" |
| Plastics, because of their reduced hardness and stability, present certain manufacturing problems. The ITI grades above represent the various combinations of tolerances practical to produce. |
|
|
