FAQ

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What is Metal Injection Molding (MIM) and how does it work

Metal Injection Molding (MIM) is an advanced manufacturing process that combines the design flexibility of plastic injection molding with the strength and durability of metal. The process involves four main stages: mixing metal powder with a binder (Feedstock), injecting it into a mold (Green Part), removing the binder (Brown Part), and finally Sintering the component in high-temperature furnaces to achieve full density.

When should I choose MIM over traditional CNC machining?

MIM is the most cost-effective and efficient solution when:

  • Your part geometry is highly complex (internal threads, blind holes, or thin walls).

  • Your annual production volume is 5,000 units or more.

  • You want to reduce material waste and eliminate secondary assembly steps.

  • The part weighs between 0.1 grams and 200 gr

What tolerances can be achieved with MIM technology?

Standard MIM tolerances typically range between ±0.3% and ±0.5% of the nominal dimensions. For even tighter tolerances required in mission-critical defense or medical applications, we offer secondary precision CNC machining and grinding operations.

Which materials can you process?

We work with a wide spectrum of materials tailored to specific industrial needs, including:

  • Stainless Steels (e.g., 316L, 17-4 PH): For high corrosion resistance.

  • Low-Alloy Steels (e.g., 100Cr6, 4140): For high hardness and mechanical stress.

  • Heat-Treatable Steels: For components requiring toughness and fatigue strength.

  • Specialty Alloys: Including Titanium and Tungsten for aerospace and defense.

Is the density of a MIM part comparable to forged steel?

Yes. Our sintering process achieves a density of 96% to 99% of the theoretical density. This results in mechanical properties that are nearly identical to wrought or forged materials, making MIM parts suitable for high-stress applications in the firearm and defense industries.

What is the minimum wall thickness you can produce?

One of the primary advantages of MIM is the ability to produce very thin-walled structures. We can reliably manufacture features with wall thicknesses as low as 0.2 mm, depending on the overall part geometry.

Do you provide secondary finishing and coating services?

Absolutely. We offer a “one-stop-shop” solution that includes:

  • Heat Treatment: To optimize hardness and durability.

  • Surface Coatings: Including Cerakote®, Black Oxide, chrome plating, and phosphating.

  • High-Precision Machining: For parts requiring sub-micron accuracy.

What is the typical lead time for a new MIM project?

Typically, the mold design and sampling phase (Green Part to Sintered Part) takes 6 to 10 weeks. Once the samples are approved, mass production lead times depend on the volume but generally range from 4 to 8 weeks.