The difference between TAP and MACH or CAP is, so I have been told, is a different behaviour when it comes to selection of the actual bolt length from the list of available bolt lengths.
The theoretically bolt length is rounded DOWN to the next available for TAP bolts, while for all others the length is rounded UP to the next value.
Note that there is by default in rounding up a grace distance of .99999, i. e. 40.9999 will result in 40 mm while 41 will determine a 45 mm bolt.
Never checked the TAP behaviour myself, because we define the tap depth be the bolt diameter and then there is enough space in the hole for any additional few millimeters.
The difference between TAP and MACH or CAP is, so I have been told, is a different behaviour when it comes to selection of the actual bolt length from the list of available bolt lengths.
The theoretically bolt length is rounded DOWN to the next available for TAP bolts, while for all others the length is rounded UP to the next value.
Note that there is by default in rounding up a grace distance of .99999, i. e. 40.9999 will result in 40 mm while 41 will determine a 45 mm bolt.
Never checked the TAP behaviour myself, because we define the tap depth be the bolt diameter and then there is enough space in the hole for any additional few millimeters.
