Determining the screw thread requirement for a project can be difficult. Do you need stainless steel or an exotic metal? What’s going to drive lead time? At PST Group, our experts have been providing this type of engineering advice for years. If you’re struggling with your project, review our five most frequently asked questions (and answers) for some expert insights.
Q: How do I choose the right material for my project?
A: It depends on your application. If you’re working with a 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 as an option.
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 that works best for your project, instead of the price tag.
Q: What types of things drive lead time for my job?
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 in 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.
Q: Tooling is important to me. What kind of tooling do you have or do you need to acquire for my job?
A: At PST, we have lots of manufacturing tooling on hand, including tooling for thread rolling dies. Ultimately, the exact tooling we’ll use will depend on your job 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 manufacturing expects is happy to help.