MIL-HDBK-1897(AT)
5.1.4.2 Roundness.
TABLE V. Out-of-roundness tolerances for solid shaft investment castings.
Diameter |
TIR 1/ |
0.500 1.000 1.500 2.000 |
0.005 0.010 0.012 0.015 |
1/ Represents total indicator reading (TIR) and does not carry a plus (+) or minus (-) tolerance.
5.1.4.3 Concentricity. Limit is in relationship of diameters A and B. Gate location is a vital factor in maintaining concentricity (see figure 1).
Diameter A |
Diameter B |
TIR |
0.500 1.000 2.000 2.500 |
0.250 0.500 1.000 1.250 |
0.005 0.008 0.012 0.015 |
FIGURE 1. Concentricity tolerances for solid shaft investment castings.
5.1.5 Angles. Tolerances for angles, as-cast, depend upon the location of angles in the casting. The tolerance may range from + 0.5 degrees ( ) for angles in well supported positions to
+ 2 where inherent distortion could be expected (see figure 2).
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