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.
|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
Waste is substantially lower than machining from stock
Reduced usage of consumable cutting tools
Reduced machining time
Higher productivity and production volumes possible