214327 24 Revision B
Term
Definition
ORFS
O-ring face seal: A style of fitting commonly used for connecting hoses and tubes. This
style of fitting is also commonly called ORS, which stands for O-Ring Seal
SAE
Society of Automotive Engineers
Screw
A headed and externally threaded fastener that threads into preformed threads or forms
its own thread when inserted into a mating part
Self-Propelled (SP)
Windrower
Self-propelled machine consisting of a power unit and a header. It is designed to cut and
lay crops into windrows for later harvest
SK
Single knife
SKD
Single-knife drive
Soft joint
A flexible joint made by use of a fastener in which the joining materials compress or relax
over a period of time
Tension
An axial load placed on a bolt or screw, usually measured in Newtons (N) or pounds (lb.).
This term can also be used to describe the force a belt exerts on a pulley or sprocket
TFFT
Turns from finger tight
Torque
The product of a force * the length of a lever arm, usually measured in Newton-meters
(Nm) or foot-pounds (lbf∙ft)
Torque angle
A tightening procedure in which a fitting is assembled to a specified tightness (usually
finger tight) and then the nut is turned farther by a specified number of degrees until it
achieves its final position
Torque-tension
The relationship between the assembly torque applied to a piece of hardware and the
axial load it induces in a bolt or screw
Truck
A four-wheel highway/road vehicle weighing no less than 3400 kg (7500 lb.)
Washer
A thin cylinder with a hole or a slot located in the center, used as a spacer, a load
distribution element, or a locking mechanism
WCM
Windrower control module
Windrower
The power unit for a header
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