DRILL POINT SELECTION GUIDE
TWIST DRILLS, DIE DRILLS, & COOLANT FED DRILLS
FOR HIGHER PENETRATION RATES, LONGER TOOL LIFE, & MORE ACCURATE HOLES
TWIST DRILLS (NON-COOLANT) AVAILABILITY POINT GEOMETRY & USE ADVANTAGES
90º Included point (not spotting type) Special Order Cam relieved. Produces thinner chips for very
ductile, soft materials (Chip Class 20 & 40).		 High lip relief for faster penetration.
Less abrasive wear at corners.
118º Standard point Standard Cam relieved. For variety of materials Easily resharpened on standard equipment
118º Split point Modified Standard Cam relieved. Excellent web thinned point. Self centering. Split point acts as chipbreaker.
118º x 45º Double angle point Modified Standard Both angles cam relieved.
For cast irons and abrasive materials.		 Reduces corner wear at point
Reduces breakthrough burrs.
135º Split point Standard Cam relieved and split to NAS 907 standard.
Excellent web thinned point.		 Self centering. Split point acts as chipbreaker.
135º x 45º Double angle point Modified Standard Both angles cam relieved.
For cast irons and abrasive materials.		 Reduces corner wear at point.
Reduces breakthrough burrs.
DIE DRILLS FOR HARD STEELS AVAILABILITY POINT GEOMETRY & USE ADVANTAGES
118º Negative edge point Standard For verry hard materials (50 Rc to 65 Rc). Longer tool life.
118º Positive edge point Standard For less hard materials (35 Rc to 50 Rc). Permits higher feed rates.
140º Negative edge point Standard For extremely tough materials (50 Rc to 65 Rc). Longer tool life
140º Positive edge point Standard For less hard materials (35 Rc to 50 Rc). Permits higher feed rates.
COOLANT FED DRILLS - STRAIGHT FLUTES AVAILABILITY POINT GEOMETRY & USE ADVANTAGES
125º Four facet point Standard Flat relieved point.
Self centering - free cutting.		 Permits higher feed rates.
Longer tool life.
Closer hole tolerance.
125º x 45º Double angle, Four facet point Modified Standard Both angles flat relieved.
Self centering - free cutting		 Reduces corner wear at point.
Reduces breakthrough burrs.
COOLANT FED TWIST DRILLS AVAILABILITY POINT GEOMETRY & USE ADVANTAGES
125º Four facet point Standard Flat relieved point.
Self centering - free cutting		 Permits higher feed rates.
Longer tool life.
Closer hole tolerances.
125º x 45º Double angle, Four facet point Modified Standard Both angles flat relieved.
Self centering - free cutting		 Reduces corner wear at point.
Reduces breakthrough burrs.
135º Split point Standard Cam relieved point.
Excellent web thinned point.		 Self centering.
Split point acts as chipbreaker.
135º x 45º Double angle, Split point Modified Standard Both angles cam relieved.
Excellent web thinned point.		 Reduces corner wear at point.
Reduces breakthrough burrs.