Counterbores for sinking until a diameter of 5 mm have two main cutting edges and counterbores for sinking diameters larger than 5 mm up to 20 mm have three or more main cutting edges. They are right-hand cutting and have a fixed pilot pin for guiding in the through hole or in the thread core hole.
Countersinks are used for countersinking and deburring and have three axial-radial reliefed ground cutting edges. 60° countersinks – are used for deburring DIN 334 form C HSS/HSSE 90° countersinks -are mainly used for sinking screws. DIN 335 form C HSS/HSSE CBN grounded version 120° countersinks - are mostly used for blind rivets. DIN 347 form C HSS/HSSE
20-pcs. srewdriver-bit-set 7,98€1,99€
incl. VA, excl. shipping costs
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