The MIM (Metal Injection Molding) tolerance range is the permissible variation in part dimensions and shapes, determined by material properties, mold design, and process parameters. Achieving this range involves controlling these factors.
Typical MIM Part Tolerance
| Size | Dimension | Tolerance | Accuracy |
|---|---|---|---|
| Ultra-small | ≤1.2 | +0.025 | ±2% |
| Ultra-small | 1.2-2.5 | +0.038 | +15% |
| Small | 2.5-6.3 | ±0.051 | +8% |
| Small | 6.3-12.5 | +0.064 | +0.5% |
| Medium | 12.5-25 | +0.076 | +0.3% |
| Large | 25-50 | +0.152 | +3% |
| Ultra-Large | 50-75 | +0.229 | +0.3% |
| feature | best possible± | nominal typical± |
|---|---|---|
| absolute dimension | 0.025mm | 0.05mm |
| Angle | 0.05° | 2° |
| density | 0.002 | 1% |
| dimension | 0.0005 | 0.3% |
| flatness | 0.001 | 0.2% |
| hole diameter | 0.0004 | 0.1% |
| hole location | 0.001 | 0.3% |
| parallelism | 0.002 | 0.3% |
| perpendicularity | 0.1%or 0.1° | 0.2%or 0.3° |
| roundness | 0.003 | 0.3% |
| surface roughness | 0.2μm | 0.8μm |
| weight | 0.001 | 0.4% |
| corner radius | 0.1mm | 0.15mm |