Metric Tap Drill Size Chart For Standard Threads
Introduction
Tap drill size chart is an essential guide for anyone working with threads. It helps in determining the correct drill size to use for tapping the hole. A metric tap drill size chart is an important tool for those who deal with metric threads. In this article, we will discuss the metric tap drill size chart for standard threads.
Metric Threads
Metric threads are commonly used in Europe and Asia. The metric system is based on the International System of Units (SI) and uses millimeters as the unit of measurement. The pitch of a metric thread is the distance between two consecutive threads, measured in millimeters. The most common metric thread pitch is 1.0mm, 1.25mm, 1.5mm, and 1.75mm.
Tapping a hole
Tapping a hole is the process of cutting threads into a hole using a tap. The tap is a cutting tool that is designed to cut threads into a hole. To tap a hole, you need to first drill a hole of the correct size. The drill size is determined by the size of the tap and the thread pitch.
Metric Tap Drill Size Chart
The metric tap drill size chart lists the correct drill size to use for tapping a hole for a given size of the tap and thread pitch. The chart is based on the ISO metric thread standard (ISO 68-1). The drill size is usually given in millimeters and is the diameter of the drill bit that should be used.
Using the Metric Tap Drill Size Chart
To use the metric tap drill size chart, you need to know the size of the tap and the thread pitch. Once you have this information, you can look up the correct drill size in the chart. For example, if you have a 10mm tap with a pitch of 1.25mm, you can use a 8.5mm drill bit to tap the hole.
Conclusion
A metric tap drill size chart is an important tool for anyone working with metric threads. It helps in determining the correct drill size to use for tapping a hole. By using the chart, you can ensure that the threads are cut correctly and that the threaded part fits tightly and securely.