Presto 0861021.0-12 - 21.00mm SS HSS 1/2" BLACKSMITH'S DRILL - DIN1412A WEB THIN

General-purpose drill, to drill steels with tensile strength up to 1.000 N/mm2, cast steel, grey cast iron, malleable cast iron, nickel brass and graphite.

The additional web thinning enables better positioning and reduced feed force and torque. Reduced parallel shank 1/2".

Sold Individually.

Design characteristics
Point grinding: cone relief point
Point angle: 118°
Web thinning: form A
Helix angle: normal
Web thickness: normal
Web taper: normal
Flute form: normal
Tolerance of dia.: h8
Tolerance of shank: -0,01/,0,08