.25-20 Helicoil Drill Size: A Comprehensive Guide
Introduction
When it comes to repairing damaged threads, Helicoil is a widely used and trusted solution. But to install a Helicoil, you need to drill a hole of the correct size. In this article, we will focus on the .25-20 Helicoil drill size, its applications, and the importance of using the right drill bit.
What is .25-20 Helicoil?
The .25-20 Helicoil is a type of thread repair insert designed to repair damaged or stripped threads. It is commonly used in industries such as aerospace, automotive, and industrial manufacturing. The .25-20 Helicoil has a major diameter of 0.25 inches and 20 threads per inch.
Drill Size for .25-20 Helicoil
To install a .25-20 Helicoil, you need to drill a hole with a specific size. The recommended drill size for .25-20 Helicoil is #7 (0.2010 inches). This drill size ensures a snug fit for the Helicoil insert, allowing for a strong and reliable thread repair.
Importance of Correct Drill Size
Using the correct drill size is crucial for a successful Helicoil installation. If the drill size is too small, the Helicoil may not fit properly, leading to a weak thread repair. On the other hand, if the drill size is too large, the Helicoil may not provide a secure fit, resulting in a failed repair.
Drill Bit Selection
When drilling a hole for a .25-20 Helicoil, it's essential to choose a drill bit that can maintain its size and accuracy. A high-speed steel (HSS) drill bit or a cobalt steel drill bit is recommended for drilling through metal.
Conclusion
In conclusion, the .25-20 Helicoil drill size is a critical aspect of thread repair. By using the correct drill size, #7 (0.2010 inches), and selecting the right drill bit, you can ensure a strong and reliable thread repair. Remember, attention to detail is key when working with Helicoil inserts.
