MIM Tolerence
Injection molding tolerances range between 0.3% and 0.5%, although tighter tolerances can be achieved if deemed necessary. Since MIM components range in size over a wide range of sizes, it can be difficult to address tolerances directly. Occasionally, the tolerance versus size table has been created, showing capabilities as follows: MIM tolerances can be obtained in a single batch, but are usually subject to wider variation over time.
Item | Tolerence ± | Qualified ± |
Absoluted Dimension | 0.025 mm (0.001 inch) | 0.05 mm (0.002 inch) |
Angle | 0.05° | 2° |
Density | 0.2% | 1% |
Dimension | 0.05% | 0.3% |
Flatness | 0.1% | 0.2% |
Hole Diameter | 0.04% | 0.1% |
Hole Location | 0.1% | 0.3% |
Parallelism | 0.2% | 0.3% |
Perpendicularity | 0.1% or 0.1° | 0.2% or 0.3° |
Roundness | 0.3% | 0.3% |
Surface Roughness | 0.2 µm (8 µ inch) | 0.8 µm (32 µ inch) |
Weight | 0.1% | 0.4% |
Radius | 0.1 mm (0.004 inch) | 0.15 mm (0.006 inch) |
