Specification of HSS Jobber DrillSet
Sherwood HSS Jobber Drill sets, Bright Finish-25 pieces
General purpose drills for steels, cast steel, grey cast iron, malleable cast iron, brass, aluminium alloy of nickel and graphite. Point angle: 120 °, helix angle: normal, web thickness: standard, relief angle: 10 ° to 20 °, tolerance of diameter: h8, tolerance of shank: f11. Manufactured to BS 341/DIN338RN.
Bright Finish
Drills with a bright finish are supplied in the as-ground condition and such tools are used
