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Revision A
Table 6.13
Definitions (continued)
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
PARK
The slot opposite the NEUTRAL position on operator
’
s console of M1 and M2 Series
Windrowers
R1 SP Series Header
MacDon R113 and R116 Rotary Disc Headers for windrowers
R2 SP Series Header
MacDon R216 Rotary Disc Headers for windrowers
rpm
Revolutions per minute
SAE
Society of Automotive Engineers
SCR
Selective catalytic reduction
Screw
A headed and externally threaded fastener that threads into preformed threads or forms
its own thread when inserted into a mating part
spm
Strokes per minute
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
Timed (knife drive)
Synchronized motion applied at cutterbar to two separately driven knives from a single
hydraulic motor
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
ULSD
Ultra-low sulphur diesel
Untimed (knife drive)
Unsynchronized motion applied at the cutterbar to two separately driven knives from a
single hydraulic motor or from two hydraulic motors
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
Windrower
The power unit for a header
