Charts

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Random and Useless Scientific Conversions

RandomScientificCalculationsChart.pdf

Random and Useless Scientific Conversions
Ratio of an igloo’s circumference to its diameter = Eskimo Pi
2000 pounds of Chinese soup = Won ton
1 millionth of a mouthwash = 1 microscope
Time between slipping on a peel and smacking the pavement = 1 bananosecond
Weight an evangelist carries with God = 1 billigram
Time it takes to sail 220 yards at 1 nautical mile per hour = Knotfurlong
16.5 feet in the Twilight Zone = 1 Rod Sterling
Half of a large intestine = 1 semicolon
1,000,000 aches = 1 megahurtz
Basic unit of laryngitis = 1 hoarsepower
Shortest distance between two jokes = A straight line
453.6 graham crackers = 1 pound cake
1 million-million microphones = 1 megaphone
2 million bicycles = 2 megacycles
365.25 days = 1 unicycle
2000 mockingbirds = 2 kilomockingbirds
52 cards = 1 decacards
1 kilogram of falling figs = 1 FigNewton
1000 milliliters of wet socks = 1 literhosen
1 millionth of a fish = 1 microfiche
1 trillion pins = 1 terrapin
10 rations = 1 decoration
100 rations = 1 C-ration
2 monograms = 1 diagram
4 nickels = 2 paradigms
2.4 statute miles of intravenous surgical tubing at Yale University Hospital = 1 IV League
1 mouthful of dirt = 1 terabyte (from Sage!)

Drilling Speed Chart

DrillingSpeedChart.pdf

Drilling Speed Chart
WIRE DRILLS CORE DRILLS AND SIMILAR BY OUTSIDE DIAMETER
.75 – 2.5 mm 1/8 to 1/2 inch 5/8 to 1-1/2 inch 1-3/4 to 2-3/4 inch 3 to 4 inch
30,000 TO 18,000 rpm 2,400 -1,000 rpm 1,250 – 1,000 rpm 1,100 – 850 rpm 850 – 200 rpm

Cutting Speeds Table #1 Chart

CuttingSpeedsTableNo1Chart.pdf

Suggested Cutting Speeds with High Speed Steel (HSS) Cutting Tools
Table No. 1
MATERIAL BRINELL (BHN) DRILLSĀ  S.F.M. TAPS-S.F.M. THREADS PER INCH
3-7 1/2 8-15 16-24 25 UP
Aluminum 99-101 200-250 50 100 150 200
Aluminum Bronze 170-187 60 12 25 45 60
Bakelite 80 50 100 150 200
Brass 192-202 200-250 50 100 150 200
Bronze, Common 166-183 200-250 40 80 100 150
Bronze, Phos.; 1/2 Hard 187-202 175-180 25 40 50 80
Bronze, Phos.; Soft 149-163 200-250 40 80 100 150
Celluloid 100 50 100 150 200
Copper 80-85 70 40 80 100 150
Copper, Mang.; 30% Min. 134 15
Duralumin 90-104 200 50 100 150 200
Everdur 179-207 60 20 30 40 50
Iron, Cast; Soft 126 140-150 30 60 90 140
Iron, Cast; Med. Soft 196 80-110 25 40 50 80
Iron, Cast; Hard 293-302 45-50 10 20 30 40
Iron, Cast; Chilled 402 15 5 5 10 10
Iron Malleable 112-126 85-90 20 30 40 50
Monel 149-170 50 8 10 15 20
Nickel, Pure 187-202 75 25 40 50 80
Nickel Steel; 3 1/2% 196-241 60 8 10 15 20
Rubber, Hard 100 50 100 150 200
Screw Stock; C.R. 170-196 110 20 30 40 50
Steel, Carbon 175-225 70 30 40 50 50
Steel, Drop Forged 170-196 60 12 25 45 60
Steel, Machinery 170-196 110 35 50 60 85
Steel, Magnet; Soft 241-302 35-40 20 40 50 75
Steel, Magnet; Hard 321-512 15 5 10 15 25
Steel, Mang.; 7-13% 187-217 15 15 20 25 30
Steel, Mild; .20-.30C 170-202 110-120 40 55 70 90
Steel, Molybdenum 196-235 55 20 30 35 45
Steel, Spring 402 20 10 10 15 15
Steel, Stainless 150-225 50 8 10 15 20
Steel, Stainless 460-520 20 8 10 15 20
Steel, .40-.50C 170-196 80 20 30 40 50
Steel, Structural; A-36 160 110 40 55 70 90
Steel, Tool; S.A.E. and Forging 149 75 25 35 45 55
Steel, Tool; S.A.E. and Forging 241 50 15 15 25 25
Steel, Tool; S.A.E. and Forging 402 15 8 10 15 20
Zinc, Alloy 112-126 200-250 50 100 150 200

Note: 1) HSS reaming tools should be at approximately 2/3 of Drill RPM. 2) Carbide tools should be at approximately double above values.