Enlarging the end of a hole

Cone shaped enlargement

Final finish and position of the drilled hole

Correct only diameter of the drilled hole

Enlarging the end of a hole

Cone shaped enlargement of the end of a hole

Final finish and position of the drilled hole

Correct only diameter of the drilled hole

Enlarging the end of a hole

Producing a large hole

Final finish and position of the drilled hole

Correct only diameter of the drilled hole

Feed rate is high

Insufficient coolant is used

Cutting speed is too low

Lips of drill are of unequal length

Radial drilling machine

Deep hole drilling machine

Sensitive drilling machine

Portable drilling machine