DRILLING SPEEDS FOR HIGH SPEED STEEL DRILLS
Material	Suggested Cutting Speeds
	ft/min	m/sec
Aluminum and its Alloys	200-300	1.0 -1.5
Brass and Bronze (ordinary)	150-300	.75 -1.5
Bronze(HighTensile)	70-150	35- 75
DieCastings(ZincBase)	300-400	1.5-20
Iron-Cast(soft)	100-150	.5-.75
Cast(medium hard)	70-100	.35 -5
Hard Chilled	30- 40	.15-.25
Malleable	80-90	.4-.45
Magnesium and its Alloys	250-400	1.25-2.0
Monel or High-Nickel Steel	30-50	.15-.25
Plastics or Similar Materials (Bakelite)	100-300	.5 -1.5
Steel-Mild .2 carbon to .3 carbon	80-110	.4 -.55
Steel .4 carbon to .5 carbon	70-80	.35-4
Tool 1.2 carbon	50- 60	.25 -.3
Forgings	40-50	.2 -.25
Alloy-300 to 400 Brinell	20- 30	.1 -.15
High Tensile (Heat Treated)
35 to 40Rockwell C 30 - 40 15 - .2 10 - 12	30 - 40	.15-.2
40 to 45 Rockwell C	25- 35	.125- .175
45 to 50 RockweIl C	15- 25	0.075-0.125
50 to 55 RockweIl C	7-15	.035- .075
Stainless Steel
Free Machining Grades	30-80	.15-.4
Work Hardening Grades	15- 50	0.075-0.25
Titanium Alloy Sheet	50-60	.25-.3
Titanium Alloys
Ti-75A (Commercially Pure)	50-60	.25-.3
Ti.6AL-4V BR. 310-350	20- 35	.1 -.175
Inconel Alloy BR. 200-400	15- 20	.075- .1
Hastelloy(Wrought) BR. 140-310	15-20	.075- 1
Hastelloy(Cast) BR. 200-375	5- 7	.025-.035
Rene BR.225-400	12-20	.06 -.1
Zirconium Alloys BR 140-28O	55	.275
Wood	300-400	1.5-2.0
FEEDS FOR DRILLS
Dia. of drill	Feed	Dia. of drill	Feed
(Inches)	(inches/rev.)	(mm)	(mm/rev)
Under 1/8	.001 to .002	Under 3.0	025 to .050
1/8 to 1/4	.002 to 004	3 to 65	.050 to .100
1/4 to 1/2	.004 to.007	6.5 to 13.0	.100 to .175
1/2 to 1	.007 to.015	13 to 25	.175 to.380
1 and over	.015 to 025	25 and over	.380 to .650