Smarter Material Choices for Custom Machines

When we begin projects with custom machines at KT Tech, the first conversations usually focus on the big picture. We ask questions like: What is your bottleneck? What are the safety risks? What are your goals? Those answers guide our early design direction and help us define success for your machine.

But there are plenty of smaller design decisions that are often just as critical to a machine’s performance, like material selection. We work closely with customers to understand what factors are most important in material selection and help identify the best material for the job.

Why Material Selection Matters in Custom Machines

Every custom machine is built for a specific environment and set of requirements. Many of our partners are medical device manufacturers, and that can lead to important constraints on materials that can be used. Depending on the application, there may be standards related to corrosion resistance, particulate control, biocompatibility, or any number of other factors.

Even in less regulated industries, the material needs to match the job. Some parts require strength and wear resistance, while others may need to minimize weight. Material selection is where all of those priorities come together.

Balancing Performance and Cost

Cost is always part of the conversation in our projects, whether we’re machining parts or building machines. Our goal is to help customers protect their bottom line without sacrificing performance.

In machine building, many customers provide an approved material list and rely on us to select the best fit for each part of the machine. We base decisions on both performance and budget.

For many components, aluminum is an excellent option. It provides a balance of strength and machinability, leading to efficient machining and cost-effective results. In most applications, it’s more than strong enough for the machine’s function.

Experience Across Materials Gives You More Options

KT Tech’s custom machine building is a turnkey process, in part because we handle the manufacturing in-house. We work with a wide range of metals and plastics in our CNC precision machining services, allowing us to choose the right material from a large set of options. 

Plastics play an important role in many of our systems. They offer potential advantages within medical devices, like low friction and chemical resistance. But they also create unique machining challenges in managing tolerances and the potential for deformation.  

Our team has spent years developing the processes behind our plastic machining services, and we can machine these materials reliably. It allows us to build effective automation systems without concerns about performance or delays. 

A Case Study in Tradeoffs: PTFE in Sensitive Applications

Material selection often comes down to tradeoffs. Here’s one common example: Brass would, in some ways, be an excellent option for items like bushings because it’s accessible, cost-effective, and performs well in many scenarios. 

But in medical manufacturing, particulate control is critical. Brass has the potential to create particulate matter during machining or even simply due to wear during use. As a result, it often cannot be used.

In those cases, we often recommend polytetrafluoroethylene (PTFE). PTFE can be a safer choice in sensitive work, but the tradeoff is that PTFE is not as strong as brass. So the design may require adjustments to account for this and ensure durability and long-term performance. 

Material tradeoffs like this are exactly why engineering input matters. We ensure the right material decisions and design adjustments are in place from the start, and our in-house machining ensures we can quickly iterate and prove out your project.

Building the Right Custom Machines for Your Operations

Material selection is just one example of our customer-first approach to projects at KT Tech. Whether you need Swiss machining services or custom machines, we help you make the decisions that support your success. 

If you’re looking for a machine builder, we want to learn more about your challenge and help you find the best path forward. Reach out today to start the conversation with our California machine shop!