Cooper Tools Quackenbush 158QGDAV Operations Instructions download pdf (Page 10)

TORQUE CONVERSION – IN. LBS. (NM)

In. Nm In. Nm In. Nm

5 0.6 50 5.7 140 15.8

10 1.1 60 6.8 150 17.0

15 1.7 70 7.9 160 18.1

20 2.3 80 9.0 170 19.2

25 2.8 90 10.2 180 20.3

30 3.4 100 11.3 190 21.5

35 4.0 110 12.4 200 22.6

40 4.5 120 13.6

45 5.1 130 14.7

TORQUE CONVERSION FACTORS

To Convert Into Mulitply By

Inch Pounds Foot Pounds 0.0835

Inch Pounds Newton meters 0.1130

Inch Pounds Kg-meters 0.0115

Inch Pounds Kg-Cm 1.1519

Foot Pounds Inch Pounds 12.000

Foot Pounds Newton meters 1.3560

Foot Pounds Kg-meters 0.1382

Foot Pounds Kg-Cm 13.8240

Newton Meters Inch Pounds 8.8440

Newton Meters Foot Pounds 0.7370

Newton Meters Kg-meters 0.1020

Newton Meters Kg-Cm 10.2000

Kg meters Inch Pounds 86.8100

Kg meters Foot Pounds 7.2340

Kg meters Newton-meters 9.8040

Kg Cm Inch Pounds 0.8681

Kg Cm Foot Pounds 0.0723

Kg Cm Newton-meters 0.0980

MISCELLANEOUS CONVERSION FACTORS

To Convert Into Mulitply By

Inches Millimeters 25.4000

Millimeters Inches 0.0394

Pounds Kilograms 0.4536

Kilograms Pounds 2.2050

psi bar 0.069

bar psi 14.5

AIR PRESSURE CONVERSION

PSI kPa* Bar**

85 586 5.9

90 620 6.2

95 655 6.6

100 690 6.9

125 860 8.6

* Preferred: Approximate to the nearest 5 kPa.

** Approximate to the nearest 0.5 Bar.

Suggested Surface Speeds

for High Speed Steel Drills*

MATERIAL S.F.M.

Alloy Steels – 300 to 4000 Brinell 20-30

Stainless Steels – Medium range 30-40

Automotive Steel Forgings and the like 40-50

Tool Steels Annealed – 90 to 1.20 Carbon 50-60

Steels – .40 to .50 Carbon 70-80

Steels – .20 to .30 Carbon (Machinery Steel) 80-110

Hard, Chilled Cast Iron 30-40

Medium Hard Cast Iron 70-110

Soft Cast Iron 100-150

Malleable Iron 80-90

Monel Metal 40-50

High Tensile Strength Bronze 70-150

Ordinary Brass and Bronze 200-300

Aluminum and its Common Alloys 250-400

Magnesium and its Common Alloys 250-400

Plastics – Common Types 100-150

Wood 300-400

* Carbon Steel Drills should be operated at 40%–50% of the

above speeds.

These speeds indicate the approximate range under normal conditions.

For peak performance on individual jobs, adjustments may be required.

To convert surface feet per minute (SFM) into revolutions per minutes

(RPM) use the following formula:

SFM x 3.82

RPM =

Diameter

Example: To drill 1/4" hole in aluminum:

300 x 3.82

= 4.584 RPM

.250

Drill Diameter

Surface Speed, Feet per Minute

(inches)

30 40 50 60 70 80 90 100 110 200 300 400

Spindle Speeds, RPM

1/4 458 611 764 917 1070 1222 1375 1528 1681 3056 4584 6111

5/16 367 489 611 733 856 976 1100 1222 1345 2445 3666 4888

3/8 306 407 509 611 713 815 917 1019 1120 2037 3056 4074

7/16 262 349 437 524 611 698 786 873 960 1746 2619 3492

1/2 229 306 382 458 535 611 688 764 840 1528 2282 3056

If there is a choice between tools of about the same speed but of different sizes, final selection is made by preference for a lighter-weight tool or one with more

power to maintain speed under load.

Conversion Table

Torque – Air Pressure – Miscellaneous

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 136 137

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Cooper Tools Quackenbush 158QGDAV Operations Instructions Page 10

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