Manufacturers & Metal Injection Molding for Precision Parts

San Francisco, CA, renowned for its thriving technology and innovation ecosystem, has witnessed a surge in demand for highly sophisticated micro-precision components. Producing these parts using traditional methods presents numerous challenges, especially given the high operational costs associated with manufacturing in the Bay Area. Increasingly, local manufacturers are seeking transformative solutions, and metal injection molding provided in San Francisco, CA, is at the forefront. Smith Metal Products offers this efficient, scalable method, which is redefining the region's approach to precision manufacturing, delivering exceptional results for industries ranging from electronics to aerospace, defense, and IoT.


The Traditional Precision Parts Manufacturing Challenge
 

The quest for micro-precision parts is nothing new in San Francisco, CA’s dynamic industrial landscape. Traditional manufacturing techniques—such as CNC machining, investment casting, and stamping—often fall short when tasked with producing extremely intricate, small-scale geometries. These methods can result in high material waste, extensive labor requirements, long lead times, and fluctuating quality. In regions like San Francisco, CA, where facility rents, skilled labor, and material costs are significantly higher than the national average, these problems are magnified.
 
For companies developing the next generation of electronics, sensors, or medical devices, even the smallest defects or inconsistencies can render entire batches unusable, jeopardizing product launches and bottom lines. This pressure is especially acute for startups and high-growth enterprises based in the Bay Area that are looking for efficient ways to move to mass production without sacrificing quality or cost control. It has become abundantly clear that a new approach is necessary—one that mitigates the inherent drawbacks of legacy manufacturing methods.


This is where metal injection molding steps in as a game-changer, offering San Francisco, CA, manufacturers a way to overcome traditional limitations and seize new opportunities in precision parts manufacturing.


What Is Metal Injection Molding?


Metal injection molding—or MIM—is an advanced manufacturing process that blends traditional powder metallurgy with plastic injection molding technology. The process involves mixing fine metal powders with a binder to create a feedstock, which is then injected into a mold cavity under high pressure. After forming, the binders are carefully removed, and the parts undergo sintering, resulting in dense, high-strength metal components with exceptional precision.
 
Unlike conventional manufacturing processes that require cutting, machining, or stamping parts from blocks of metal, metal injection molding allows manufacturers in San Francisco, CA, to create intricate designs in a single molding cycle. This is especially advantageous in applications where complexity, tight tolerances, and repeatability are critical. Electronics, aerospace, defense, and IoT companies in the Bay Area increasingly rely on MIM for their most demanding projects.


Overcoming High-Cost Regional Barriers With MIM
 

One of the biggest advantages of metal injection molding is its ability to address the high operational costs endemic to San Francisco, CA. Real estate prices, labor rates, and utility costs are all major concerns for manufacturers. With traditional manufacturing approaches, each additional process—be it cutting, finishing, or assembly—translates to higher costs.
 
Metal injection molding provides a streamlined solution. By consolidating multiple manufacturing steps into a single operation, it drastically reduces labor requirements and production time. It also minimizes material usage, as parts are formed to near-net shape, reducing scrap and post-processing expenses. The result? Lower unit costs, reduced waste, and faster turnaround, making MIM a cost-effective choice for precision parts manufacturing in even high-cost markets like San Francisco, CA.
 
This efficiency empowers startups, small businesses, and established corporations alike, enhancing their competitiveness without forcing them to sacrifice quality or scale.


The Benefits of Metal Injection Molding for Manufacturers


San Francisco, CA’s market for micro-precision parts is bustling, yet challenging. Here’s how metal injection molding is delivering value:


Tighter Tolerances


Metal injection molding offers unparalleled control over part dimensions, enabling manufacturers to achieve extremely tight tolerances—down to microns. This is paramount for applications in electronics, medical devices, aerospace, and defense, where precision directly impacts performance and safety.


Lower Waste


Unlike subtractive manufacturing processes that start with a metal billet and machine away excess material, MIM produces parts to near-net shape. The minimal waste generated not only contributes to cost savings but also supports sustainability goals—a major focus for many San Francisco, CA, companies.


Excellent Surface Finish


With MIM, surface finish quality is consistently high, often eliminating the need for secondary finishing operations. This is particularly beneficial for aesthetic or functional components used in consumer electronics, IoT devices, and luxury goods produced in San Francisco, CA.


Scalability and Mass Production


One of the defining strengths of metal injection molding is its scalability. Once the initial mold and feedstock formulation are developed, manufacturers can produce thousands—even millions—of identical parts with speed and repeatability. This mass production capability is a boon for companies in the Bay Area with ambitious growth plans, facilitating rapid market entry and expansion.


Industries Benefiting From Metal Injection Molding in San Francisco, CA


MIM’s versatility means it is particularly well-suited to the needs of the Bay Area’s diverse industries:

 

  • Electronics: Micro connectivity devices, sensor housings, and shielding components benefit from MIM’s precision and cost efficiency.
  • Aerospace: The ability to produce strong, lightweight, complex geometries supports innovation in aircraft and satellite manufacturing.
  • Defense: High-reliability weapon components, structural elements, and sensing devices require MIM’s tight tolerances and strength.
  • IoT and Tech Startups: Compact form factors and high-volume scalability power the next wave of smart devices and connected technologies.


San Francisco, CA’s unique economy—where speed, quality, and lean operations are essential—makes metal injection molding a strategic tool for product designers and engineers.


The MIM Process: Full Production


One of the most empowering attributes of metal injection molding is its adaptability across the product development cycle. In San Francisco, CA, innovative companies use MIM for everything from mass production. The process is as follows:


1.
Design & Tooling: Engineers create CAD designs to capture even the most complex details. Molds are then precision-fabricated.
2.
Feedstock Preparation: Metal powders are blended with binders to obtain optimal flow during injection.
3.
Injection Molding: The feedstock is injected into the mold, replicating intricate features with consistency.
4.
Debinding & Sintering: Binders are chemically or thermally removed, and parts are sintered to achieve their final density and mechanical strength.
5.
Secondary Operations (Optional): Parts are optionally finished, coated, or assembled, often requiring minimal post-processing.
 
This iterative, scalab
le process means San Francisco, CA, manufacturers can quickly respond to market demands, customer feedback, and evolving technologies.


Why MIM Is the Future of Precision Manufacturing in San Francisco, CA


The Bay Area’s manufacturers face constant pressure to innovate, scale efficiently, and deliver flawless products. Metal injection molding provides San Francisco, CA, businesses with a powerful solution, overcoming the limitations and high costs of traditional manufacturing. Whether creating complex aerospace components, micro connectors for electronics, or robust IoT device housings, MIM offers unmatched advantages: tighter tolerances, reduced waste, exceptional surface finish, and mass production capability.
 
With local expertise and global reach, metal injection molding will play a pivotal role in helping San Francisco maintain its status as a world leader in technology and advanced manufacturing.


Harness the Power of Metal Injection Molding Today!


Manufacturers—if you’re ready to elevate your precision parts production with metal injection molding provided in San Francisco, CA, now is the time! Whether you’re in electronics, aerospace, defense, or the fast-growing IoT industry, our team is ready to guide you through every step of the process. Contact us today to discuss your project needs and discover how MIM can unlock new levels of efficiency and quality for your business.

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by Ashley Paulson 31 March 2025
How do you know if your part is a good candidate for metal injection molding (MIM)? The first thing to think about is the quantity of parts you need. At Smith Metal Products, we work with customers looking for more than 25,000 parts per year if they have one design. For multiple designs, we look for over 10,000 parts per year for each design. Small runs of parts do not make sense for MIM with the cost of the molds needed for the process. The second determination depends on the material used to make the part. The typical metals we use at Smith Metal Products include stainless steel and titanium. However, there are many other alloys that we have experience with and others that we would be willing to develop depending on the scope of your project. We cannot use aluminum, zinc, magnesium, or brass. Part size can also dictate the compatibility with MIM. We look for maximum part lengths of three inches or less. However, there are some exceptions. Wall thickness (or thin-ness) may have an impact on MIM viability. The minimum wall thickness that we look for is .020" or 5 mm. We also do not want walls that are thicker than .125" or 3mm. In some cases, we may be able to "core out" these areas in the design for manufacturability process. Part weight is another consideration. Most of the parts we manufacture are under 25 grams, but we use 100 grams as the highest weight compatible with MIM. Why does it make sense to use MIM? If you have higher priced machined or cast components, MIM may be a cost savings. If you are a machine shop, MIM can be used to create blanks and free up machine time for you to work on other projects. Some multi-component assemblies may be combined into a single MIM component. Components made out of expensive materials like Inconel or titanium are good candidates since you do not cut away value material in the MIM process. The metal needed for the part is injected, not cut away from bar stock. If you are considering a part for MIM, please email us at DFM@smithmetals.com and we will evaluate the part.
by Ashley Paulson 27 March 2025
When you think about quality, what comes to mind? Meeting tolerances? Consistency? Free of defects? Strong, stable complex parts? All of these things come into play. Quality is important to us at Smith Metal Products. We want our customers to be glad they are working with us each and every time they place an order. We strive to meet or exceed all of our customers' requirements every day.
by Ashley Paulson 24 March 2025
Smith Metal Products manufactures only in the United States. Located in Center City, Minnesota, Smith Metal Products in centrally located. Why is it beneficial to work with a company producing products only in America? 1. You support American jobs and local communities. 2. You reduce shipping times from your metal injection molding supplier. 3. Your parts won't get stuck and delayed in customs. 4. You can speak with the people that work right where your parts are being made and collaborate on design for manufacturability. 5. You don't have to worry about the uncertainty of tariffs, because you are not importing your parts. Some companies say they are manufacturing parts in their United States locations, and then have the designs made abroad. Rest assured that if you work with Smith Metal Products, your parts are being manufactured in Minnesota. If you would like to move your small, complex, high volume, metal part manufacturing back to the United States, email us at DFM@smithmetals.com
by Ashley Paulson 28 February 2025
Last week on Tuesday, Perkins Media visited Smith Metal Products in Center City, Minnesota. They spent the day capturing what we do at Smith Metal Products, why our employees want to be here, and why customers like working with Smith. It is difficult to capture everything you want to say in a short video, but we are excited to see the end result. The video will be used on our website as well as in our tradeshow booths. Here are some things we are looking to communicate through the video: 1. We value our customers and work hard every day to make high-quality products. 2. Since we are employee-owned, employees have an ownership mentality that translates to deeply caring about the products and service we provide. 3. Smith Metal Products takes care of our employees, and they are able to grow wealth for retirement through the ESOP (employee stock ownership plan). 4. We make everything in the USA. By working with us, customers are supporting American jobs. In addition, customers do not have to worry about long overseas lead times, higher shipping costs, uncertain tariffs, and parts getting delayed in customs. 5. Collaboration is important to us. We like to be involved in the product development process early to provide feedback on design for manufacturing. We can describe how different features will affect the metal injection molding process and ways we may be able to save the customer money by removing the need for some secondary machining operations. 6. We are a metal injection molding (MIM) company. Not every part is a good fit for MIM. If we think that a potential customer's part design could be made better in a different way (due to wall thickness, lack of complexity, low volumes, etc.), we will be honest and communicate that. We want our customer to be happy and confident in the choice to work with us. Looking at the list above, we might need a couple videos, but we are excited for some fresh content. We are here and ready to collaborate! If you have a design that might be a good fit for MIM, email us at DFM@smithmetals.com Do you need video content for your business? Find out more about Perkins Media at www.perkinsmediagroup.com or email them at info@perkinsmediagroup.com
by Ashley Paulson 25 February 2025
January and February were busy months for us. First, we attended the SHOT Show® in Las Vegas, Nevada at the end of January. There was a lot to see, and so many people to talk to with 14.1 miles of aisles within the two convention centers! That is a lot of ground to cover. Companies bring their newest products for all to view and connect with fellow companies in the shooting, hunting, and outdoor recreation space. The Smith Metal Products team was able to connect with current customers and discover potential customers as well. At the beginning of February, we traveled to Anaheim, California for MD&M West. This show was previously known as Informa Markets Engineering West. Under the name MD&M West, it now combines MD&M West, ATX West, D&M West, Plastec West, and WestPack. There are all types of manufacturers included in the 1700+ that attend this show. Most of the companies that we interacted with were in the medical device space. There were over 13,500 attendees. Some of the people that stopped by the Smith Metal Products booth were not familiar with metal injection molding, so we had the opportunity to educate some people as well. Hopefully, they will take what they learned and incorporate it into designs they are working on. At both shows, it was fun to talk to companies about their designs and how we can help them. We were thankful to receive a lot of interest and explain why Smith Metal Products is a vendor that can help make a design a reality. Until next year!
by Ashley Paulson 26 December 2024
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by Ashley Paulson 23 December 2024
Merry Christmas to those that celebrate. Smith Metal Products is closed tomorrow, December 24, and Wednesday, December 25 in observance of the Christmas holiday. We will return to the office on Thursday, December 26, ready to collaborate with you. Hopefully, you get some time to relax and spend time with friends and family. Happy Holidays!
by Ashley Paulson 16 December 2024
The answer is yes and no. Yes, metal can be used in injection molding, but not by itself. In order to get the powdered metal to take the shape of the mold and hold the shape, about 20% of plastic is added to approximately 80% powdered metal. These pellets are called feedstock and they are melted and pushed into the mold. After this point, the part is not complete like it may be with plastic injection molding. The metal part needs to go through the debinding process in order to remove all of the plastic. You cannot leave the part alone after debinding, because it is very fragile and you can think of it like a sandcastle like structure. Then the metal parts go through the sintering process to strengthen the part and remove the holes that were left behind by the plastic. We most commonly use stainless steel powder. Titanium is another metal that we commonly work with. There are some metals that are not compatible with our process. We do not use aluminum, zinc, brass, magnesium or copper in the metal injection molding process. If you want to learn more about the whole process, see the "What is MIM?" section of our website.