REFERENCE
Term
Definition
Knife A cutting devi
ce which uses a reciprocating cutter (also called a s ickle)
MDS Mechanical deck shift
n/a
Not applica b le
Nut
An internal
ly threaded fastener that is designed to be paired with a bolt
N-DETENT The slot opposite the NEUTRAL position on operator’s console
NPT
National P
ipe Thread: A style of fitting used for low pressure port openings Threads
on NPT fitt
ings are uniquely tapered for an interference fit
ORB
O-ring boss: A style of fittin g com monly used in p ort opening on ma nifolds, pumps,
and motors
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
rpm
Revolutions per minute
R-Series header
MacDon R80 and R85 rotary disc headers
RoHS (
Reduction of
Hazar
dous Substances)
Adire
ctive by the European Union to restrict use of certain hazardous substances
(such
as hexavalent chromium used in some yellow zinc platings)
SAE Society of Automotive Engineers
Screw
A headed and externally threaded fastener that threads into preformed threads or
forms its own thread in one of mating parts
SDD Sin
gle-draper drive
Self-Propelled (SP)
Windrower
Self-propelled machine consisting of a power unit with a header
SK Single knife
S
KD
S
ingle-knife d rive
Soft joint
A joint made with use of a fastener where joining materials are compressible or
experience relaxation over a period of time
spm
Strokes per minute
Tension Axial load placed on a bolt or screw, usually measured in Newtons (N) or pounds (lb.)
TFFT
Turns from finger tight
Torque
The product of a force X lever arm length, usually measured in Newton-meters
(N·m) or foot-pounds (ft·lbf)
Torque angle
A tightening procedure wh ere fitting is assembled to a precondition (finger tight) and
then nut is turned farther a number of degrees or a number of flats to achieve its
final position
Torque-tension
The relationship between assembly torque applied to a piece of hardware and axial
load it induces in bolt or screw
ULSD
Ultra low sulphu r d ie sel
UCA Upper cross auger
Washer
A thin cylinder with a hole or slot located in the center that is to be used as a spacer,
load distribution element, or a locking mechanism
147962 372 Revision A
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