HMT Goldmax HSS 90º Countersinks with a 3/4" weldon shank are designed to be used with most types of magnetic broaching machines.
Features:
HMT GoldMax™ countersinks are specially coated for increased tool life, even when used without lubricant.
GoldMax™ coating keeps countersinks sharp much longer than standard HSS tools. saving money through longer tooling life.
Standard 19.05mm weldon shank for use in all standard magnet drills.
3 cutting edges, smooth chamfering, high surface finish.
Rpm in Structural Steel < 500Nm
30mm Countersink = 155 Rpm
40mm Countersink = 120 Rpm
55mm Countersink = 95 Rpm
Rpm in Stainless Steel
30mm Countersink = 35 Rpm
40mm Countersink = 30 Rpm
55mm Countersink = 25 Rpm
