Used for heavy duty drilling in work Hardening steel with a manganese content of 12-14 percent .
2 Morse taper
Overall length 190mm
Flute length 92mm

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