Determining the screw thread requirement can be difficult. Do you need stainless steel or an exotic metal? What’s going to drive lead time? At PST Group, our custom screw manufacturing experts have been providing this type of engineering advice for years. If you’re struggling to determine the right screw thread design for your project, review our five most frequently asked questions (and answers) based on our years of experience as a custom screw manufacturer.
Q: How do I choose the right Screw material?
A: It depends on your application. If you’re working with a screw thread that needs corrosion protection, we recommend an option like stainless steel, so there is no need for a coating. If you’re looking for something more economical, consider alloy steel.
Q: Should I use a rolled or ground thread?
A: Rolled threads are typically the more economical choice, while ground threads are more accurate. However, at the PST Group, we can manufacture a rolled thread so it’s as accurate as a ground thread. As such, we recommend focusing on the screw thread design that works best for your needs, instead of the price tag.
Q: What drives lead time?
A: Typically, lead time increases when tolerances increase; the higher the tolerance, the more time it could add to the manufacturing process. Similarly, the NADCAP (National Aerospace and Defense Contractors Accreditation Program) process can also add lead time and cost. If a NADCAP solution isn’t needed, we use commercial processors, which are much faster.
Q: Why does the grade of my ball screw matter? Why would I need grade three instead of grade five?
A: If you’re worried about accuracy, grading is important. The lower the number, the more accurate your screw thread. To learn more about how ball screw grades impact design, check out our blog.
Q: Tooling is important to me. What do you have or Will you need to acquire to fit my needs?
A: At The PST Group, we have a lot of manufacturing tooling on hand, including for thread rolling dies. Ultimately, the exact tooling we use will depend on your specifications and its unique specifications. We also have experiencing bringing in tooling for a job and will work with you to develop a solution that meets your needs.
We understand the complications that can go along with starting any project. If you’re struggling with defining your screw thread requirement, contact us. Our team of engineers and custom screw manufacturers are happy to help.