Reply To: Huron NU3 Milling m/c adaptor

[Raymond AndersonParticipant @raymondanderson34407]

As far as I know the ISO number identifies the taper ie 30/40/50/60 and Din 2080 identifies the method of holding in the machine spindle. For instance a BT 40 is the same taper as ISO /SK 40 and they are both the same taper as ISO 40 / DIN 2080. the difference is only in how they are held.

The ISO 30 40 et al is suited to auto toolchangers [ hence the grove in the flange ] Whilst those made to ISO / Din 2080 have solid flanges ie no groove. . They are all 7.24 tapers whether BTMas /SK or 2080.