Today, we are going to discuss the "How to figure out the tap size by the tap inner diameter of the 3D model you have downloaded.I would like to provide you with the information on the inside diameter of taps (inside diameter of female threads). I would like to provide a document that will help you understand the tap bore diameter (female thread bore diameter).
Tap I.D.
I'm sure anyone who works with 3D CAD is dimly aware of this,When you download 3D CAD data of purchased items, for example, you may find, for example, "The tap is supposed to be an M8 tap, but the diameter dimensions are not what one would expect for an M8 tap."It is.
Those who understand the relationship between bolts (male threads) and nuts (female threads) will understand this, but novice designers sometimes make the mistake of thinking that the data is wrong.It is also difficult to tell at this point whether these are corrupt data.
The hole dimensions of the screw part in the 3DCAD intermediate data are the inside diameter of the tapped hole.
In the above caseIt is only necessary to recognize that "the hole dimension of the threaded part is the tap inside diameter dimension."It is. Although the dimensions of the tap for M8 mentioned earlier were φ6.647,That is because the inside diameter of the tap for M8 was φ6.647.It is.
Download a table that shows the inner diameter of taps
Here you can download an Excel sheet that shows the inside diameter of the taps. Please customize it to make it easier to use.
*Note: The CAD data used in this article matched the model diameter and JIS tap bore diameter, but please note that some manufacturers handle slightly different CAD data. (Because each manufacturer may have different CAD settings)
That's it.