30x124mm F/L x 270mm OAL 4MT T/S Armour Piercing Drill 6605250 Cutter diameter 1-33/64"
Baker’s notes & crumb story
Description
Cutter diameter 1-33/64"
Overall length 83mm
Flute Length: 215mm
Handle: Steel
30x124mm F/L x 270mm OAL 4MT T/S Armour Piercing Drill 6605250 Cutter diameter 1-33/64"Used for heavy duty drilling in work Hardening steel with a manganese content of 12 14 percent . 4 Morse taper Overall length 270mm Flute length 124mm Operating Conditions cutting speed between 3 4 meters per minute a feed of only 60 percent of standard drill Very rigid machine set up drilled without coolant Precautions drill must not touch work without feed being engaged no marking of work surface ie centre punch