CONVERSION TABLE / DEFINITIONS
169001 Revision E
8
CONVERSION TABLE
QUANTITY
INCH-POUND UNITS
FACTOR
SI UNITS (METRIC)
UNIT NAME ABBR. UNIT NAME ABBR.
Area
acres acres x 0.4047 = hectares ha
Flow
US gallons per minute gpm x 3.7854 = liters per minute L/min
Force
pounds force lbf x 4.4482 = Newtons N
Length
inch in. x 25.4 = millimeters mm
foot ft x 0.305 = meters m
Power
horsepower hp x 0.7457 = kilowatts kW
Pressure
pounds per square inch psi
x 6.8948 = kilopascals kPa
x .00689 = megapascals MPa
Torque
pound feet or foot pounds lbf·ft or ft·lbf x 1.3558 = newton meters N·m
pound inches or inch pounds lbf·in. or in·lbf x 0.1129 = newton meters N·m
Temperature
degrees Fahrenheit ˚F (˚F - 32) x 0.56 = Celsius ˚C
Velocity
feet per minute ft/min x 0.3048 = meters per minute m/min
feet per second ft/s x 0.3048 = meters per second m/s
miles per hour mph x 1.6063 = kilometers per hour km/h
Volume
US gallons US gal. x 3.7854 = liters L
ounces oz. x 29.5735 = milliliters ml
cubic inches in.
3
x 16.3871 = cubic centimeters cm
3
or cc
Weight
pounds lb x 0.4536 = kilograms kg
DEFINITIONS
TERM DEFINITION
API
American Petroleum Institute
APT Articulating Power Tongue
ASTM American Society Of Testing And Materials
Header
The removable portion of a harvesting machine (windrower, combine, mower) that cuts and
conveys crops to a delivery opening. Includes sickle, reel and conveying systems.
Mower Conditioner
A machine that cuts and conditions hay, and is pulled by an agricultural type tractor.
PTO Power Take-Off
RPM Revolutions Per Minute
SAE Society Of Automotive Engineers
Tractor
Agricultural type tractor.
Sickle Drive Box
An enclosed system that translates rotating motion from the machine drive into reciprocating
motion to the sickle.
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