Technical data:
External ⌀:20.5 mm
Coating:uncoated
Countersink tip angle:90 degrees
Tool material:HSS
Number of cutting edges Z:3
Standard:DIN 335 C
Shank:Plain shank with h9
Through-coolant:no
smallest countersink ⌀ for holes from:3.5 mm
Overall length L:63 mm
Shank ⌀ Ds:10 mm
for countersunk screws DIN 7991:M10
Feed f in steel < 500xa0N/mm2:0.16 mm rev. Shank tolerance:h9 Colour ring:without Type of product:Stepped drill and countersink Version: All countersinks have 3 cutting edges, radially relieved. Flutes are ground from solid.Economy countersink version. Application: High-precision countersink for chatter-free 90° countersinking.