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High tolerance components may require post MIM machining to reach final dimensions. MIMforms accomplishes this either in-house or through our Value Added Partners. Either way, you'll take advantage of the economies of MIM with CNC precision.
MIM and Machining Tolerances
Different tolerances are achievable with metal injection molding and machining.
The typical tolerance achievable with MIM is +/- 0.5% variation of the subject
dimension. For features < 4.0 mm (160 mil) it is approximately +/- 0.02 mm
(1 mil). The chart below provides some basic guidelines for the dimensional
sizing and tolerances achievable. Specific tolerances should be evaluated
for any design as part of the development process. Some features may be fully
machined to achieve the desired size and tolerance.
|
Minimum
|
MIM
|
Machining
|
Final
Tolerance
|
| Hole radius | 0.5 mm (20 mil) | 0.25 mm (10 mil) | +/- 15 µm (0.6 mil) |
| Corner radius | 0.05 mm (2 mil) | 0.05 mm (2 mil) | +/- 15 µm (0.6 mil) |
| Wall thickness | 0.5 mm (20 mil) | 0.5 mm (20 mil) | +/- 15 µm (0.6 mil) |
Benefits of Machining MIM Parts vs. Machining
from Stock
Waste is
substantially lower than machining from stock
Reduced usage
of consumable cutting tools
Reduced machining
time
Higher productivity
and production volumes possible
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