I made a couple tool holders and the insert that I used has this nomenclature, '40-60° double countersink'.
I assume the 60° is the taper of the screw but what does the 40 and double countersink mean?
If I were to guess the screw has two tapers, a 40° and 60°?
I assume the 60° is the taper of the screw but what does the 40 and double countersink mean?
If I were to guess the screw has two tapers, a 40° and 60°?