Few issues are more frustrating and costly than improperly threaded components. As one of the final manufacturing steps, errors in this step can be major roadblocks to productivity. Explore the ways thread milling tools, metalworking lubrication and the right tool speed can improve the quality of a threaded hole.

Signs of a Poorly Threaded Hole

One of the most obvious signs that you have a poorly threaded hole is that the no-go gauge enters the thread or the go gauge won’t enter it. There are, however, more subtle signs that can still affect the quality of your component:

  • Burr at the end of the threaded hole
  • Chip root isn’t cut off
  • Overall finish quality is poor

Improve the quality of a threaded hole to avoid poor surface finish and these other issues. Even if the threaded inefficiency isn’t serious enough to prevent a go gauge, you can still improve your production quality with the right threading tools and practices.

Choose the Right Threading Method

Review your current threading method as you look for ways to enhance the finish quality. Replacing your existing equipment with a new mill or drill may be a major decision, but it may be what you need to reduce errors and improve threading speed. Here are three common threading options for holemaking:

  1. Thrillers
  2. Threading taps
  3. Threading mills

Thrillers combine chamfering, threading and hole drilling into a single, efficient process. A modern CNC machine can create precise holes in a repeatable, fast-paced process.

A threading tap is a popular option for short- and medium-run production. These tools don’t require the same investment and facility space, so they’re useful if your facility has a range of production steps or products to accommodate.

Threading mills are a great balance with high-sped precision, easy machining processes and CNC compatibility. Used correctly, a threading mill can work on a number of products with competitive tool lifespans.

Compare Threading Inserts

Threading mills can use indexable inserts to create tooling that’s easy to alter, maintain or repair. Acme threading inserts come in a range of insert geometries, materials and other factors, so be sure to compare them carefully to find the optimal insert for your process.

Review the number of cutting edges, the material and the type of tooling your chosen insert is compatible with. When you work with a leading provider of inserts and other tooling, you can enjoy professional guidance and recommendations on inserts for your specific project.

Use Metalworking Lubrication

Lubrication is essential for virtually any metal milling or tapping application. If you aren’t using a metalworking lubricant, or aren’t satisfied with the quality of yours, then tapping fluid may be all you need to improve the quality of your threading process.

Set the Right Tool Speed

Whether you’re tapping deep holes or working on small projects, your threading inserts need to operate at the right tool speed. Calculate the appropriate tool speed and consider adjusting it if you notice excessive heat, tool wear or manufacturing flaws.

Find the Right Tooling With Kennametal

Explore high-quality threading inserts with Kennametal. See how you can expand your threaded holemaking abilities by improving the quality of your existing process.

Sources:

https://www.ctemag.com/news/articles/tapping-deep-hole#

https://www.productionmachining.com/blog/post/threading-options-for-holemaking