What is a Tap Drill?
In order to make a threaded hole in a material, you need to utilize a tap drill. It is a particular kind of drill bit made with cutting threads into a substance in mind.
The size of the bolt or thread that will be utilized determines the size of the tap drill. The depth and the total number of threads that will be produced depend on the size of the tap drill.
What is the Metric Tap Drill Size?
The metric tap drill size is the size of the drill bit that is used to create the threads in a material. The size of the drill bit is based on the diameter of the bolt or thread that will be used.
Generally, the metric tap drill size is slightly smaller than the bolt or thread so that the threads can be tapped into the material without damaging it.
How to Determine the Metric Tap Drill Size
To determine the metric tap drill size, you will need to know the size of the bolt or thread that will be used. Once you know the size, you can look up the corresponding tap drill size in a chart or calculator. Depending on the material and the application, you may need to use a specific type of drill bit.
How Do You Calculate Metric Tap Drill Size?
Metric tap drill size is calculated by first knowing the size of the bolt or thread that will be used. Once the size is determined, a chart or calculator can be used to determine the corresponding tap drill size. Depending on the material and the application, special drill bits may be needed.
Metric Tap Drill Size Table
Below is a table on the available tap drill sizes for your reference:
|
Size of Bolt or Thread (mm) |
Tap Drill Size (mm) |
|
M3 |
2.5 |
|
M4 |
3.3 |
|
M5 |
4.2 |
| M6 |
5.0 |
| M8 |
6.8 |
|
M10 |
8.5 |
| M12 |
10.2 |
|
M14 |
11.9 |
| M16 |
13.7 |
|
M18 |
15.4 |
| M20 |
17.2 |
|
M22 |
19.0 |
| M24 |
20.7 |
|
M27 |
23.4 |
| M30 |
26.1 |
|
M33 |
28.9 |
| M36 |
31.6 |
|
M39 |
34.3 |
| M42 |
37.0 |
|
M45 |
39.8 |
| M48 |
42.5 |
|
M52 |
46.2 |
| M56 |
49.9 |
|
M60 |
53.7 |
| M64 |
57.4 |
|
M68 |
61.1 |
| M72 |
64.8 |
|
M76 |
68.6 |
| M80 |
72 30 |
|
M85 |
76.0 |
| M90 |
79.8 |
|
M95 |
83.5 |
| M100 |
87.2 |
Conclusion
Metric tap drill sizes are an important factor in ensuring that threads are created properly when drilling into materials. Knowing the size of the bolt or thread that will be used is the key to determining the correct tap drill size.
With the right information and tools, it is possible to accurately determine the metric tap drill size for any application.