“Static” unbalance is the term employed for unbalance within a single plane. Balancing of static unbalance may be performed either at zero speed or at running speed. Wheels are initially balanced statically off the machine but more frequently balanced at a fixed running speed. A confusion of terms
|
TABLE 4.3 Standard Fits for Wheel Bore Tolerancinga
aLower limit nominal (0). |
|
TABLE 4.4 Side Runout Tolerances for Superabrasive Wheels Standard
|
Japanese JIS B4131 Specification for Wheel Balance Tolerances
|
Diameter (mm) |
Max g |
|
> 75-150 |
0.5 |
|
>150-200 |
1 |
|
> 200-300 |
2 |
|
> 300-400 |
3 |
|
> 400-500 |
5 |
|
> 500-600 |
8 |
|
> 600-700 |
12 |
|
> 700-750 |
15 |
 |
is easily caused. Balancing at speed is often incorrectly called dynamic balancing, although strictly, the term “dynamic” balancing means balancing in two or more planes to avoid a conical gyration.