30x124mm F/L x 270mm OAL 4MT T/S Armour Piercing Drill Brand_PRECISION Note that the 'SB' Shape

Note that the 'SB' Shape has an endcutting face

Overall length 48mm

Zinc Alloys and Copper

blades C42

30x124mm F/L x 270mm OAL 4MT T/S Armour Piercing Drill Brand_PRECISION Note that the 'SB' ShapeUsed 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